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SERVICE MANUAL
LOAD EXCAVATOR
ZX75 ZX125
Doosan purchased Bobcat Company from Ingersoll-Rand Company in
2007. Any reference to Ingersoll-Rand Company or use of trademarks,
service marks, logos, or other proprietary identifying marks belonging
to Ingersoll-Rand Company in this manual is historical or nominative
in nature, and is not meant to suggest a current affiliation between
Ingersoll-Rand Company and Bobcat Company or the products of
either.
  

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TABLE OF CONTENTS
Service Manual
TITLE PAGE
LOAD EXCAVATOR ZX75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Diesel Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Travel Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Working Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pressure and Setting Values (Working) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Slew Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Check Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Load Warning Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Load Warning Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Joystick, Right. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Working Floodlights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Reach Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Charge Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Oil Pressure Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Air Filter Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Hydraulic Oil Filter Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Hydraulic Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Working Hydraulics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Breaker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Fast Travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Float Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Swing Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Additional Control Circuit I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Additional Control Circuit II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Inspection Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Operator Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Working Equipment Parallel to Tracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Cabin Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Instructions for Tilting the Cabin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
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Service Manual
TITLE PAGE
LOAD EXCAVATOR ZX125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Diesel Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Travel Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Working Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Pressure and Setting Values (Travel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Slew Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Maintenance Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Hydraulic Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Setting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Power Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Description of Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Test and Pressure Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Rexroth Valve Bank SX 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Brakes (Downhill) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Check Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Hydraulic Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Load Warning Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Working Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Joystick, Left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Restriction of Reach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Working Floodlights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Check Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Inspection Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Operator Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
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Load Excavator ZX75
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Load Excavator ZX75
Diesel Engine
Electrical System
Transmission
Travel Range
Manufacturer: KHD
Type: BF4M 1012 E
Output acc. to D/N 70020: kW/PS 53 / 72 at 2.000 min-1
Cooling: water
Injection: direct injection, turbo charged
Capacity: cm³ 3.200
High idle: min-1 2.150
Low idle: min-1
800
Spec. fuel consumption (full load): g/kWh 208
Tappet clearance - inlet cold: mm 0.3±0.1
Tappet clearance - outlet cold: mm 0.5±0.1
Torque of cylinder head studs: Nm 30 / 80 Tightening angle 90°
Further data: see engine operator's manual
Voltage: V 12
Battery: V/Ah/A 12 / 105 / 450
Generator: V/A 14 / 55
Starter: kW/PS 3.1 / 4
Starting aid: 4 glow plug
Lighting: acc. to German motor vehicle construction and use
regulation and Euronorm.
Travel pump: make Lohmann Stolterfoht GFT 9
2-stage variable displacement motor
(integrated in the travel gear):
type A 10 VE45 HZ
Travel range I: m.p.h. 1.67
Travel range II: m.p.h. 3.23
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Working Hydraulics
Pressure and Setting Values (Working)
Working pump (variable displacement
pump):
type A 10 VO 71 DFLR
Displacement: cm³/rev 0 to 71
Gear pumps: make Cassapa
Displacement: cm³/rev 14 + 14
LS-regulator (stand-by pressure
variable displacement pump): psi 362
Servo-controlled valve
(cross servo control stick): type Rexroth 4TH6 N
Servo-controlled valve, pedal (travel): type Rexroth 2TH6
Servo-controlled valve, pedal
(add. control circuit): type Rexroth 2TH6
Valve bank 1: (Mono/Circular boom) type 6 SX 14 / 7 SX 14
Valve bank 2: type 3 SM 12
LS-pressure relief valve (6 SX 14): psi 4061 (valve bank 1)
Main pressure relief valve 1 (6 SX 14): psi 4351 (safety valve)
Main pressure relief valve 2 (3 SM 12)
(high pressure): psi 3335
Line relief pressures - valve bank 1 (SM 12):
MONO and circular boom: psi 2610 / 4351
Intermediate boom: psi 2610 / 4351
Dipper stick: psi 4351 / 4351
Bucket: psi 4351 / 4351
Breaker / additional control circuit: psi 4351 / 4351
Travel left / travel right: psi 4061 / 4061 (in motor)
Line relief pressures - valve bank 2 (3SM 12):
Slewing (valves at the slew motor): psi 1450 / 3625
Dozer blade: psi ---
Articulation: psi ---
Shut-off valve: make Bergin
Shut-off pressure (high idle): psi 1595
Pressure reducing valve (pilot control): make Parker
Pilot pressure - high idle psi 435±2
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Slew Drive
Lubricants
Maintenance Parts
See Operating manual.
Capacities
Slew gear (up to 33010178): type HD 4
Slew gear (from 33010179): type ZFP - DR 140
Slew motor: type A 2 FM 28
Slew pressure (valves at slew motor): psi 1450 / 3625 (high idle)
Engine oil: see engine instruction book
Hydraulic oil: see IR hydraulic oil recommendation table
Transmission oil: MIL-L-2105 B / API-GL 5, SAE 85 W 90 LS or SAE
90 LS
Multiple-purpose grease: acc. to D/N 51825. Dripping point over 170° C.
Lithium-saponified.
gal.
Engine oil (change): approx. 2.64 engine oil
Hydraulic oil (tank and system) approx. 36.98 hydraulic oil
Hydraulic oil (change): approx. 31.70 hydraulic oil
Fuel tank: approx. 34.34 diesel
Travel gear: approx. 0.47 transmission oil, each
Slew gear: approx. 0.42 transmission oil, lifetime
Cooling agent: approx. 3.17 water with anti-corrosive and
anti-freeze agent
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A. Test port for settings at valve bank: B7. Load warning sensor
- LS - pressure (1) 1. Load sensing pressure valve (adjustable)
- safety valve pressure (2) 2. Safety valve (adjustable)
- line relief pressures (4) 3. LS - flow regulator valve (not adjustable)
and 4. Line relief valve(s) (adjustable)
Test port for settings at working pump:
- stand-by pressure
- Ap pressure
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B. Test port for settings at valve bank secondary functions and swing motor:
- main relief at valve bank 2 (SM12) line reliefs at slew motor (10 and 11)
- dozer blade (without line relief valves)
- articulation (anti-cavitation valves 6)
C. Test port for cut-off pressure valve (9)
e.g. dozer blade in end stroke position, full throttle. Slowly increase pressure
D. Test port for
- pilot pressure (12)
Adjustment bolt at pressure reducing valve (14).
Pilot pressure for additional control circuit.
Adjustment of flow (e.g, speed adjustment for
clam shell rotation)
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01. SX 14 valve bank - 1
A. Test port for settings at valve bank - 1: B7. Load warning sensor
- LS - pressure (1) 1. Load sensing pressure valve (adjustable)
- safety valve pressure (2) 2. Safety valve (adjustable)
- line relief pressures (4) 3. LS - flow regulator valve (not adjustable)
and 4. Line relief valve(s) (adjustable)
Test port for settings at working pump:
- stand-by pressure
- Ap pressure
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21. Double gear pump: C. Test port for settings at cut-off valve:
03. Cut-off valve:
B. Test port for settings at valve bank 2, secondary
functions and swing motor
- setting screw (9). e.g. dozer blade in end
stroke position, full throttle, slowly increase
pressure
02. Valve bank 2 (SM12): D. Test port for settings at pressure reducing valve
Main pressure relief valve (5) for 06. Pressure reducing valve pilot pressure
- swing (without line relief valves) - setting screw (10)
- dozer blade (without line relief valves) 13. Pressure reducing valve pilot pressure for
additional control circuit)- articulation (with anti-cavitation valves (6))
22. Swing motor - setting screw (10). e.g. speed adjustment for
clamshell grab rotation- line relief valves at swing motor (7 and 8)
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23. Variable displacement pump -working 24. Travel drive
- Plug (12) - plug (16) (counter balance valve)
- Ap - pressure valve (13) (power regulator) - check valve (17)
- load sensing regulator (14) (setting stand-by
pressure)
- pressure balance valve (18)
- Plug (19) (test port “MB”)
- power valve (15) (setting at test bench) - line relief valve with cushion piston (21) (4061 psi)
- connection “X” (22) (control pressure) fast / slow
- plug (23) (counter balance valve)
- line relief valve with cushion piston (24) (4061 psi)
- check valve (25)
- pressure control valve (26)
- shuttle valve (27)
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1. Valve bank 6 SX 14
2. Valve bank 3 SM 12
3. Pressure cut-off valve 1595 psi
4. 3/2 Way relay valve swing
5. 3/2 Solenoid high torque swing Y12
6. Pressure reducing valve pilot control 507 psi
7. 3/2 Solenoid selector valve breaker Y4
8. Pilot-operated pedal articulation
9. Pilot-operated pressure pedal travel left
10. Pilot-operated pedal travel right
11. Pilot-operated pedal intermediate boom
12. Pilot-operated lever dozer
13. Pressure reducing valve additional control circuit (clamshell)
14. Joystick left
15. Joystick right
16. Double solenoid valve, working hydraulics cut-off Y3, fast/slow Y5
17. 4/3 Solenoid operation additional control circuit clamshell Y18 / Y19
18. 2 X 4/2 Solenoid selector valve ISO - John Deere (option) YZ5 / Y26
19. Hydraulic oil thermostat valve (Wahler)
20. 4/2 Solenoid valve floating position (option) Y11
21. Load holding valve boom
29 of 89
DealerCopy--NotforResale
Service Manual Load Excavator ZX75
30 22856462
Electrical System
Fuse and relay box - Assignment plan.
1 = Instrument panel 2 = Next to Battery
Fuses Relay
Item Ampere Assigned to Position Function
F1 15 Interior light, radio, immobilizer, rotating
beacon
K01 Pre-heat relay
K1 Working floodlight, front
F2 20 Socket, refueling pump. Optional
additional heating
K2 Working floodlight, rear
K3 Not assigned
F3 15 Working floodlight, front
F4 15 Working floodlight, rear Colors of Fuses
F5 15 Horn, switch light, immobilizer 5A Yellow-brown
F6 15 Heater fan 10A Red
F7 15 Wipe/Wash system 15A Blue
F8 5 Control module signal input 20A Yellow
F9 15 Additional heating (option)
Seat with electrical heating (option)
Working floodlight(s) (optional)
FA 30 Main fuse
FB 60 Pre-heating
Cable colors
bg Beige dgr Dark gray hbr Light brown rt Red
bl Blue ge Yellow hgr Light Gray sw Black
br Brown gn Green hr Light Red vi Violet
dbl Dark blue gr Gray nt Nature ws White
dbr Dark brown hbl Light Blue or Orange
30 of 89
DealerCopy--NotforResale

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Ingersoll rand zx125 load excavator service repair manual

  • 1. SERVICE MANUAL LOAD EXCAVATOR ZX75 ZX125 Doosan purchased Bobcat Company from Ingersoll-Rand Company in 2007. Any reference to Ingersoll-Rand Company or use of trademarks, service marks, logos, or other proprietary identifying marks belonging to Ingersoll-Rand Company in this manual is historical or nominative in nature, and is not meant to suggest a current affiliation between Ingersoll-Rand Company and Bobcat Company or the products of either.     2 of 89
  • 2. 3 TABLE OF CONTENTS Service Manual TITLE PAGE LOAD EXCAVATOR ZX75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Diesel Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Travel Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Working Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Pressure and Setting Values (Working) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Slew Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Maintenance Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Check Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Load Warning Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Load Warning Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Joystick, Right. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Working Floodlights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Reach Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Charge Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Oil Pressure Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Air Filter Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Hydraulic Oil Filter Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Hydraulic Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Working Hydraulics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Breaker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Fast Travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Float Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Swing Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Additional Control Circuit I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Additional Control Circuit II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Inspection Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Operator Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Working Equipment Parallel to Tracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Cabin Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Instructions for Tilting the Cabin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3 of 89 DealerCopy--NotforResale
  • 3. 4 TABLE OF CONTENTS Service Manual TITLE PAGE LOAD EXCAVATOR ZX125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Diesel Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Travel Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Working Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Pressure and Setting Values (Travel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Slew Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Maintenance Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Hydraulic Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Setting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Power Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Description of Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Test and Pressure Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Rexroth Valve Bank SX 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Brakes (Downhill) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 Check Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Hydraulic Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Load Warning Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Working Hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Joystick, Left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Restriction of Reach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Working Floodlights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Check Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Inspection Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Operator Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 4 of 89 DealerCopy--NotforResale
  • 4. 22856462 5 Load Excavator ZX75 5 of 89 DealerCopy--NotforResale
  • 5. Service Manual Load Excavator ZX75 6 22856462 Load Excavator ZX75 Diesel Engine Electrical System Transmission Travel Range Manufacturer: KHD Type: BF4M 1012 E Output acc. to D/N 70020: kW/PS 53 / 72 at 2.000 min-1 Cooling: water Injection: direct injection, turbo charged Capacity: cm³ 3.200 High idle: min-1 2.150 Low idle: min-1 800 Spec. fuel consumption (full load): g/kWh 208 Tappet clearance - inlet cold: mm 0.3±0.1 Tappet clearance - outlet cold: mm 0.5±0.1 Torque of cylinder head studs: Nm 30 / 80 Tightening angle 90° Further data: see engine operator's manual Voltage: V 12 Battery: V/Ah/A 12 / 105 / 450 Generator: V/A 14 / 55 Starter: kW/PS 3.1 / 4 Starting aid: 4 glow plug Lighting: acc. to German motor vehicle construction and use regulation and Euronorm. Travel pump: make Lohmann Stolterfoht GFT 9 2-stage variable displacement motor (integrated in the travel gear): type A 10 VE45 HZ Travel range I: m.p.h. 1.67 Travel range II: m.p.h. 3.23 6 of 89 DealerCopy--NotforResale
  • 6. Load Excavator ZX75 Service Manual 22856462 7 Working Hydraulics Pressure and Setting Values (Working) Working pump (variable displacement pump): type A 10 VO 71 DFLR Displacement: cm³/rev 0 to 71 Gear pumps: make Cassapa Displacement: cm³/rev 14 + 14 LS-regulator (stand-by pressure variable displacement pump): psi 362 Servo-controlled valve (cross servo control stick): type Rexroth 4TH6 N Servo-controlled valve, pedal (travel): type Rexroth 2TH6 Servo-controlled valve, pedal (add. control circuit): type Rexroth 2TH6 Valve bank 1: (Mono/Circular boom) type 6 SX 14 / 7 SX 14 Valve bank 2: type 3 SM 12 LS-pressure relief valve (6 SX 14): psi 4061 (valve bank 1) Main pressure relief valve 1 (6 SX 14): psi 4351 (safety valve) Main pressure relief valve 2 (3 SM 12) (high pressure): psi 3335 Line relief pressures - valve bank 1 (SM 12): MONO and circular boom: psi 2610 / 4351 Intermediate boom: psi 2610 / 4351 Dipper stick: psi 4351 / 4351 Bucket: psi 4351 / 4351 Breaker / additional control circuit: psi 4351 / 4351 Travel left / travel right: psi 4061 / 4061 (in motor) Line relief pressures - valve bank 2 (3SM 12): Slewing (valves at the slew motor): psi 1450 / 3625 Dozer blade: psi --- Articulation: psi --- Shut-off valve: make Bergin Shut-off pressure (high idle): psi 1595 Pressure reducing valve (pilot control): make Parker Pilot pressure - high idle psi 435±2 7 of 89 DealerCopy--NotforResale
  • 7. Service Manual Load Excavator ZX75 8 22856462 Slew Drive Lubricants Maintenance Parts See Operating manual. Capacities Slew gear (up to 33010178): type HD 4 Slew gear (from 33010179): type ZFP - DR 140 Slew motor: type A 2 FM 28 Slew pressure (valves at slew motor): psi 1450 / 3625 (high idle) Engine oil: see engine instruction book Hydraulic oil: see IR hydraulic oil recommendation table Transmission oil: MIL-L-2105 B / API-GL 5, SAE 85 W 90 LS or SAE 90 LS Multiple-purpose grease: acc. to D/N 51825. Dripping point over 170° C. Lithium-saponified. gal. Engine oil (change): approx. 2.64 engine oil Hydraulic oil (tank and system) approx. 36.98 hydraulic oil Hydraulic oil (change): approx. 31.70 hydraulic oil Fuel tank: approx. 34.34 diesel Travel gear: approx. 0.47 transmission oil, each Slew gear: approx. 0.42 transmission oil, lifetime Cooling agent: approx. 3.17 water with anti-corrosive and anti-freeze agent 8 of 89 DealerCopy--NotforResale
  • 8. Load Excavator ZX75 Service Manual 22856462 23 A. Test port for settings at valve bank: B7. Load warning sensor - LS - pressure (1) 1. Load sensing pressure valve (adjustable) - safety valve pressure (2) 2. Safety valve (adjustable) - line relief pressures (4) 3. LS - flow regulator valve (not adjustable) and 4. Line relief valve(s) (adjustable) Test port for settings at working pump: - stand-by pressure - Ap pressure 23 of 89 DealerCopy--NotforResale
  • 9. Service Manual Load Excavator ZX75 24 22856462 B. Test port for settings at valve bank secondary functions and swing motor: - main relief at valve bank 2 (SM12) line reliefs at slew motor (10 and 11) - dozer blade (without line relief valves) - articulation (anti-cavitation valves 6) C. Test port for cut-off pressure valve (9) e.g. dozer blade in end stroke position, full throttle. Slowly increase pressure D. Test port for - pilot pressure (12) Adjustment bolt at pressure reducing valve (14). Pilot pressure for additional control circuit. Adjustment of flow (e.g, speed adjustment for clam shell rotation) 24 of 89 DealerCopy--NotforResale
  • 10. Load Excavator ZX75 Service Manual 22856462 25 01. SX 14 valve bank - 1 A. Test port for settings at valve bank - 1: B7. Load warning sensor - LS - pressure (1) 1. Load sensing pressure valve (adjustable) - safety valve pressure (2) 2. Safety valve (adjustable) - line relief pressures (4) 3. LS - flow regulator valve (not adjustable) and 4. Line relief valve(s) (adjustable) Test port for settings at working pump: - stand-by pressure - Ap pressure 25 of 89 DealerCopy--NotforResale
  • 11. Service Manual Load Excavator ZX75 26 22856462 21. Double gear pump: C. Test port for settings at cut-off valve: 03. Cut-off valve: B. Test port for settings at valve bank 2, secondary functions and swing motor - setting screw (9). e.g. dozer blade in end stroke position, full throttle, slowly increase pressure 02. Valve bank 2 (SM12): D. Test port for settings at pressure reducing valve Main pressure relief valve (5) for 06. Pressure reducing valve pilot pressure - swing (without line relief valves) - setting screw (10) - dozer blade (without line relief valves) 13. Pressure reducing valve pilot pressure for additional control circuit)- articulation (with anti-cavitation valves (6)) 22. Swing motor - setting screw (10). e.g. speed adjustment for clamshell grab rotation- line relief valves at swing motor (7 and 8) 26 of 89 DealerCopy--NotforResale
  • 12. Load Excavator ZX75 Service Manual 22856462 27 23. Variable displacement pump -working 24. Travel drive - Plug (12) - plug (16) (counter balance valve) - Ap - pressure valve (13) (power regulator) - check valve (17) - load sensing regulator (14) (setting stand-by pressure) - pressure balance valve (18) - Plug (19) (test port “MB”) - power valve (15) (setting at test bench) - line relief valve with cushion piston (21) (4061 psi) - connection “X” (22) (control pressure) fast / slow - plug (23) (counter balance valve) - line relief valve with cushion piston (24) (4061 psi) - check valve (25) - pressure control valve (26) - shuttle valve (27) 27 of 89 DealerCopy--NotforResale
  • 13. Service Manual Load Excavator ZX75 28 22856462 28 of 89 DealerCopy--NotforResale
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  • 15. Load Excavator ZX75 Service Manual 22856462 29 1. Valve bank 6 SX 14 2. Valve bank 3 SM 12 3. Pressure cut-off valve 1595 psi 4. 3/2 Way relay valve swing 5. 3/2 Solenoid high torque swing Y12 6. Pressure reducing valve pilot control 507 psi 7. 3/2 Solenoid selector valve breaker Y4 8. Pilot-operated pedal articulation 9. Pilot-operated pressure pedal travel left 10. Pilot-operated pedal travel right 11. Pilot-operated pedal intermediate boom 12. Pilot-operated lever dozer 13. Pressure reducing valve additional control circuit (clamshell) 14. Joystick left 15. Joystick right 16. Double solenoid valve, working hydraulics cut-off Y3, fast/slow Y5 17. 4/3 Solenoid operation additional control circuit clamshell Y18 / Y19 18. 2 X 4/2 Solenoid selector valve ISO - John Deere (option) YZ5 / Y26 19. Hydraulic oil thermostat valve (Wahler) 20. 4/2 Solenoid valve floating position (option) Y11 21. Load holding valve boom 29 of 89 DealerCopy--NotforResale
  • 16. Service Manual Load Excavator ZX75 30 22856462 Electrical System Fuse and relay box - Assignment plan. 1 = Instrument panel 2 = Next to Battery Fuses Relay Item Ampere Assigned to Position Function F1 15 Interior light, radio, immobilizer, rotating beacon K01 Pre-heat relay K1 Working floodlight, front F2 20 Socket, refueling pump. Optional additional heating K2 Working floodlight, rear K3 Not assigned F3 15 Working floodlight, front F4 15 Working floodlight, rear Colors of Fuses F5 15 Horn, switch light, immobilizer 5A Yellow-brown F6 15 Heater fan 10A Red F7 15 Wipe/Wash system 15A Blue F8 5 Control module signal input 20A Yellow F9 15 Additional heating (option) Seat with electrical heating (option) Working floodlight(s) (optional) FA 30 Main fuse FB 60 Pre-heating Cable colors bg Beige dgr Dark gray hbr Light brown rt Red bl Blue ge Yellow hgr Light Gray sw Black br Brown gn Green hr Light Red vi Violet dbl Dark blue gr Gray nt Nature ws White dbr Dark brown hbl Light Blue or Orange 30 of 89 DealerCopy--NotforResale