Caterpillar Cat 321D LCR EXCAVATOR (Prefix TXA) Service Repair Manual (TXA00001 and up).pdf

Service Repair Manual
Model
321D LCR EXCAVATOR

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Product: EXCAVATOR
Model: 321D LCR EXCAVATOR TXA
Configuration: 321D LCR Excavator TXA00001-UP (MACHINE) POWERED BY C6.4 Engine
Disassembly and Assembly
C6.4 Engine for Caterpillar Built Machines
Media Number -KENR8106-09 Publication Date -01/10/2017 Date Updated -18/10/2017
i03495529
Fuel Injection Lines - Remove
SMCS - 1252-011
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 278-4138 Fuel System Protection Gp (1)
1
( 1 )
This tool can only be used one time.
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
NOTICE
Contact with high pressure fuel may cause personal injury or death.
Wait 60 seconds after the engine has stopped to allow fuel pressure to
purge before any service or repair is performed on the engine fuel
lines.
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321D LCR Excavator TXA00001-UP (MACHINE) POWERED BY C6.4 Engine(SEB...
2019/10/12
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NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Dispose of all fluids according to local regulations and mandates.
Note: Discard all fuel injection lines after use. Fuel injection lines must only be used one time.
Note: Before opening the fuel system, the engine must be turned off for at least one minute.
Note: Use CaterpillarElectronic Technician (ET) to verify that the fuel system pressure is at zero
before opening the fuel system.
Note: Use Tooling (A) after any fuel line has been disconnected.
Note: Put identification marks on all hoses, on all hose assemblies, on all harness assemblies, and
on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies.
This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.
Contact with high pressure fuel may cause fluid penetration and burn
hazards. High pressure fuel spray may cause a fire hazard. Failure to
follow these inspection, maintenance and service instructions may cause
personal injury or death.
1. Turn the fuel supply to the OFF position.
2/5
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Illustration 1 g01375415
2. Remove bolt (4) in order to remove tube assembly (5) and the O-ring seal.
3. Remove bolts (6) and reposition fuel priming pump (7) .
4. Disconnect harness assembly (1) .
5. Remove clip (2) .
6. Remove two bolts (3) (not shown) and reposition fuel filter base (8) .
7. Remove bolts (9) in order to remove plate assembly (10) .
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8. Remove clips (11) .
9. Remove fuel injection lines (12) and discard fuel injection lines (12) .
10. The following Steps are for removing the fuel return line, if necessary.
a. Remove bolt (13) and the washers in order to disconnect tube assembly (14) . Discard
the washers.
4/5
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The inlet manifold was removed for photographic purposes.
b. Remove bolts (15) and the washers. Discard the washers. Remove tube assembly
(14) .
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat Oct 12 13:21:16 UTC+0800 2019
5/5
2019/10/12

Shutdown SIS
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Product: EXCAVATOR
i03495621
Fuel Injection Lines - Install
SMCS - 1252-012
Installation Procedure
NOTICE
1. Steps 1.a through 1.b are for installing the return fuel line, if necessary.
The inlet manifold was removed for photographic purposes.
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a. Install tube assembly (14) . Install new washers and bolts (15) . Tighten bolts (15) to a
torque of 15 ± 2 N·m (11 ± 1 lb ft).
b. Connect tube assembly (14) . Install new washers and bolt (13) . Tighten bolt (13) to a
torque of 34 ± 4 N·m (25 ± 3 lb ft).
2. Install new fuel injection lines (12) . Tighten the ends of fuel injection lines (12) to a torque
of 41 ± 5 N·m (30 ± 4 lb ft).
3. Install clips (11) .
2/4
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4. Position plate assembly (10) and install bolts (9) .
5. Position fuel filter base (8) and install two bolts (3) (not shown).
6. Install clip (2) .
7. Connect harness assembly (1) .
8. Position fuel priming pump (7) and install bolts (6) .
9. Install the O-ring seal onto tube assembly (5) . Install tube assembly (5) and install bolt (4) .
10. Turn the fuel supply to the ON position.
Sat Oct 12 13:22:12 UTC+0800 2019
3/4
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Shutdown SIS
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Product: EXCAVATOR
i02746263
Fuel Manifold (Rail) - Remove
SMCS - 1702-011
Removal Procedure
Start By:
a. Remove the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines
- Remove".
NOTICE
lines.
NOTICE
NOTICE
1/3
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containing fluids.
NOTICE
Fuel injection lines MUST only be used once. Discard all fuel injection
lines after use.
This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.
Note: Use Caterpillar Electronic Technician (ET) to verify that the fuel system pressure is at zero
2/3
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1. Loosen clamp (4) and disconnect hose (5).
2. Remove fitting (3).
3. Remove bolts (2) and remove fuel manifold (1).
Sat Oct 12 13:23:08 UTC+0800 2019
3/3
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Shutdown SIS
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Product: EXCAVATOR
i02746264
Fuel Manifold (Rail) - Install
SMCS - 1702-012
NOTICE
1. Position fuel manifold (1) and install bolts (2).
2. Install fitting (3). Tighten fitting (3) to a torque of 25 + 3 - 0 N·m (18 + 2 - 0 lb ft).
3. Connect hose (5) and tighten clamp (4).
1/2
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End By:
a. Install the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines -
Install".
Sat Oct 12 13:24:04 UTC+0800 2019
2/2
2019/10/12

Shutdown SIS
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Product: EXCAVATOR
i04554149
Fuel Injection Pump - Remove
SMCS - 1251-011
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 278-4138 Fuel System Protection Gp (1)
1
( 1 )
This tool can only be used one time.
Start By:
A. Remove the fan drive. Refer to Disassembly and Assembly, "Fan Drive - Remove and
Install".
Note: Cleanliness is an important factor. Before you begin the removal procedure, the exterior of
the components should be cleaned. Cleaning the components thoroughly will help to prevent dirt
from entering the internal mechanism.
Plugging all hose assemblies helps to prevent fluid loss, and this helps to keep contaminants from
entering the system.
NOTICE
lines.
1/6
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NOTICE
containing fluids.
NOTICE
Note: Use Caterpillar Electronic Technician (ET) to verify that the fuel system pressure is at zero
Note: Use Tooling (A) after any fuel line has been disconnected.
2/6
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(2) Fuel injection pump drive gear
(3) Idler gear
Note: Mark the teeth on pump drive gear (2) and idler gear (3) for installation purposes.
1. Remove cover (1) .
2. If you are reusing pump drive gear (2) , mark pump drive gear (2) and idler gear (3) .
3/6
2019/10/12

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3. If replacing pump drive gear (2) or a problem is encountered, align the "33" Mark on fuel
injection pump drive gear (2) with the "3" Mark on idler gear (3) by rotating the engine.
Note: The No. 1 cylinder is at the top center position when the "33" Mark and the "3" Mark
are in alignment.
4. Disconnect hose assembly (4) .
5. Remove nut (5) .
6. Disconnect hose assemblies (6) and remove the washers. Discard the washers.
8. Remove tube assembly (9) and remove bracket assembly (8) .
9. Loosen clamp (12) and disconnect hose (13) .
10. Remove fitting (11) in order to disconnect tube assembly (10) and remove the washers.
Discard the washers.
4/6
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11. Remove tube assembly (14) .
13. Remove bolt (16) in order to remove hose assembly (17) and the washers. Discard the
washers.
14. Remove bolt (19) in order to disconnect hose assembly (18) and the washers. Discard the
washers.
15. Remove bolt (20) . Remove tube assembly (10) and the washers. Discard the washers.
16. Remove bolts (22) .
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17. Remove two bolts (23) (not shown).
18. Remove bolts (24) .
19. Remove fuel injection pump (21) and the O-ring seal.
20. If you are reusing the pump drive gear, remove the pump drive gear and install the pump
drive gear on the new fuel injection pump. The marks that were made during removal will
be used to orient the fuel injection pump during installation. If a new gear is being used,
transfer the mark from the original gear to the replacement gear for installation purposes.
Sat Oct 12 13:24:59 UTC+0800 2019
6/6
2019/10/12

Shutdown SIS
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Product: EXCAVATOR
i04786161
Fuel Injection Pump - Install
SMCS - 1251-012
Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning
fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be
deposited on the parts which may cause trouble. Inspect all parts. If any parts are worn or
damaged, use new parts for replacement. Dirt and other contaminants can damage the precision
component. Perform assembly procedures on a clean work surface. Keep components covered and
protected at all times.
Note: Check the O-ring seals, the gaskets, and the seals for wear or for damage. Replace the
components, if necessary.
NOTICE
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2019/10/12

Caterpillar Cat 321D LCR EXCAVATOR (Prefix TXA) Service Repair Manual (TXA00001 and up).pdf

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