This document provides an overview of the electric steering system used on BOMAG Variocontrol single drum rollers. It describes the key components of the electric steering circuit including the electric steering wheel, ESX control unit, steering valve, steering pump, steering cylinders and optional emergency steering valve. The document also provides diagrams of the steering valve and emergency steering valve along with their positions in the hydraulic and electrical systems.
The document provides information about Bomag's Variocontrol system for single drum rollers. It describes the system's components including the exciter system, gear pump, valve block, swash motor, and acceleration transducer. The system allows independent control of compaction power by automatically adjusting amplitude based on compaction status and travel direction. This provides optimal compaction while preventing over-compaction from drum jumping.
Bomag bw 179 pdh 4 single drum rollers service repair manualfjskekdmmem
This document provides technical data and adjustment values for the BW 177 DH Series 4 single drum roller, including specifications for the Deutz diesel engine, hydrostatic travel pump, drum drive motor, vibration pump, steering pump, rear axle, and recommended filling capacities. The machine's serial number range and manufacture dates are also listed to ensure the correct documentation is referenced.
Bomag bw 177 d 4 single drum rollers service repair manualfjsqazkekdmme
This document provides information about service training for the BOMAG BW 177 D-4 single drum roller. It includes a table of contents, introduction, technical specifications, maintenance schedules and instructions for various components. The maintenance section outlines maintenance tasks to be performed at regular intervals up to 5,000 operating hours. It also provides details on engine type, hydraulic systems, travel systems, vibration, steering and electrical systems.
Bomag bw 141 ac 4 tandem rollers service repair manualpfiskdmjekm
The document provides technical specifications for Tandem Rollers including the BW 141, BW 154, and BW 154 AM models. It includes details on the diesel engine, hydraulic pumps and motors, drum gearboxes, vibration systems, and other components. Technical data such as pump displacements, motor types, pressure settings, and fluid capacities are presented.
Bomag bw 177 d 4 single drum rollers service repair manualujdkkdkdmm
The document provides information about service training for the BW 177 D-4 single drum roller. It includes sections on the Deutz diesel engine, lubrication oil circuit, fuel system, valve clearance checking, plug-in injection pump, travel system components, vibration system, steering system, and electrical system. Technical specifications and maintenance procedures are also outlined. The document aims to support trainers and trainees in maintaining the machine to ensure high reliability and uptime.
Bomag bw 177 d 4 single drum rollers service repair manualwedsrffcdgdv
The document provides information about service training for the BW 177 D-4 single drum roller. It includes sections on the Deutz diesel engine, lubrication oil circuit, fuel system, valve clearance checking, plug-in injection pump, travel system components, vibration system, steering system, and electrical system. Technical specifications and maintenance procedures are also outlined. The document aims to support trainers and trainees in maintaining the machine to ensure high reliability and uptime.
Bomag BW 177 D-4 Single Drum Rollers Service Repair Manual.pdfkm7seydwuhdw
The document provides information about service training for the BW 177 D-4 single drum roller. It includes sections on the Deutz diesel engine, lubrication oil circuit, fuel system, valve clearance checking, plug-in injection pump, travel system components, vibration system, steering system, and electrical system. Technical specifications and maintenance procedures are also outlined. The document aims to support trainers and trainees in maintaining the machine to ensure high reliability and uptime.
Bomag bw 177 single drum rollers service repair manualfjsqazkekdmme
The maintenance table lists maintenance work to be performed on the single drum roller at various intervals. Tasks include checking fluid levels daily, changing engine oil and filters every 500 hours, changing hydraulic oil and filters every 2000 hours, and checking components annually such as the air filters, belts, and scraper adjustments. Thorough and timely maintenance is important to ensure the machine's safety, functionality, and lifetime.
The document provides information about Bomag's Variocontrol system for single drum rollers. It describes the system's components including the exciter system, gear pump, valve block, swash motor, and acceleration transducer. The system allows independent control of compaction power by automatically adjusting amplitude based on compaction status and travel direction. This provides optimal compaction while preventing over-compaction from drum jumping.
Bomag bw 179 pdh 4 single drum rollers service repair manualfjskekdmmem
This document provides technical data and adjustment values for the BW 177 DH Series 4 single drum roller, including specifications for the Deutz diesel engine, hydrostatic travel pump, drum drive motor, vibration pump, steering pump, rear axle, and recommended filling capacities. The machine's serial number range and manufacture dates are also listed to ensure the correct documentation is referenced.
Bomag bw 177 d 4 single drum rollers service repair manualfjsqazkekdmme
This document provides information about service training for the BOMAG BW 177 D-4 single drum roller. It includes a table of contents, introduction, technical specifications, maintenance schedules and instructions for various components. The maintenance section outlines maintenance tasks to be performed at regular intervals up to 5,000 operating hours. It also provides details on engine type, hydraulic systems, travel systems, vibration, steering and electrical systems.
Bomag bw 141 ac 4 tandem rollers service repair manualpfiskdmjekm
The document provides technical specifications for Tandem Rollers including the BW 141, BW 154, and BW 154 AM models. It includes details on the diesel engine, hydraulic pumps and motors, drum gearboxes, vibration systems, and other components. Technical data such as pump displacements, motor types, pressure settings, and fluid capacities are presented.
Bomag bw 177 d 4 single drum rollers service repair manualujdkkdkdmm
The document provides information about service training for the BW 177 D-4 single drum roller. It includes sections on the Deutz diesel engine, lubrication oil circuit, fuel system, valve clearance checking, plug-in injection pump, travel system components, vibration system, steering system, and electrical system. Technical specifications and maintenance procedures are also outlined. The document aims to support trainers and trainees in maintaining the machine to ensure high reliability and uptime.
Bomag bw 177 d 4 single drum rollers service repair manualwedsrffcdgdv
The document provides information about service training for the BW 177 D-4 single drum roller. It includes sections on the Deutz diesel engine, lubrication oil circuit, fuel system, valve clearance checking, plug-in injection pump, travel system components, vibration system, steering system, and electrical system. Technical specifications and maintenance procedures are also outlined. The document aims to support trainers and trainees in maintaining the machine to ensure high reliability and uptime.
Bomag BW 177 D-4 Single Drum Rollers Service Repair Manual.pdfkm7seydwuhdw
The document provides information about service training for the BW 177 D-4 single drum roller. It includes sections on the Deutz diesel engine, lubrication oil circuit, fuel system, valve clearance checking, plug-in injection pump, travel system components, vibration system, steering system, and electrical system. Technical specifications and maintenance procedures are also outlined. The document aims to support trainers and trainees in maintaining the machine to ensure high reliability and uptime.
Bomag bw 177 single drum rollers service repair manualfjsqazkekdmme
The maintenance table lists maintenance work to be performed on the single drum roller at various intervals. Tasks include checking fluid levels daily, changing engine oil and filters every 500 hours, changing hydraulic oil and filters every 2000 hours, and checking components annually such as the air filters, belts, and scraper adjustments. Thorough and timely maintenance is important to ensure the machine's safety, functionality, and lifetime.
Bomag bw 179 dh single drum rollers service repair manualfjskekdmmem
This document provides technical data and adjustment values for the BW 177 DH Series 4 single drum roller, including specifications for the Deutz diesel engine, hydrostatic travel pump, drum drive motor, vibration pump, steering pump, rear axle, and recommended filling capacities. The machine's serial number range and manufacture dates are also listed to ensure the correct documentation is referenced.
Bomag bw 177 single drum rollers service repair manualwedsrffcdgdv
The document provides a maintenance table for a single drum roller that outlines maintenance work to be performed at various operating hour intervals. It lists over 40 maintenance items ranging from daily checks of fluid levels to annual tasks like changing engine oil and filters. Performing regular maintenance according to the schedule is important to ensure the machine is ready for demanding construction work and all safety systems function properly.
Bomag bw 179 dh single drum rollers service repair manualujdkdkdmdm
The document provides a maintenance table for a single drum roller that outlines maintenance work to be performed at various operating hour intervals. It lists over 40 maintenance items ranging from daily checks of fluid levels to annual tasks like changing engine oil and filters. Performing regular maintenance according to the schedule is important to ensure the machine is ready for heavy duty work and meets safety standards.
Bomag bw 179 dh single drum rollers service repair manualfjskekazswdmme
The document provides a maintenance table for a single drum roller that outlines maintenance work to be performed at various operating hour intervals. It lists over 40 maintenance items ranging from daily checks of fluid levels to annual tasks like changing engine oil and filters. Performing regular maintenance according to the schedule is important to ensure the machine is ready for demanding construction work and all safety systems function properly.
Bomag bw 177 single drum rollers service repair manualujdkkdkdmm
This document provides technical data and adjustment values for the BW 177 DH Series 4 single drum roller, including specifications for the Deutz diesel engine, hydrostatic travel pump, drum drive motor, vibration pump, steering pump, rear axle, and recommended filling capacities. The machine's serial number range and manufacturer details are given for major components. Technical parameters like power output, displacement volumes, pressure settings, and speed values are listed.
Bomag bw 179 pdh 4 single drum rollers service repair manualfjskekazswdmme
The document provides a maintenance table for a single drum roller that outlines maintenance work to be performed at various operating hour intervals. It lists over 40 maintenance items ranging from daily checks of fluid levels to annual tasks like changing engine oil and filters. Performing regular maintenance according to the schedule is important to ensure the machine is ready for demanding construction work and all safety systems function properly.
Bomag BW 177 Single Drum Rollers Service Repair Manual.pdfkm7seydwuhdw
This document provides technical data and adjustment values for the BW 177 DH Series 4 single drum roller, including specifications for the Deutz diesel engine, hydrostatic travel pump, drum drive motor, vibration pump, steering pump, rear axle, and recommended filling capacities. The machine's serial number range and component manufacturers are also listed. Key specifications include an engine power of 74.9 kW at 2200 rpm, a travel pump maximum displacement of 56 cm3/rev, and a drum drive motor displacement of 60 cm3/rev in stage 1.
Bomag BW 179 PDH-4 Single Drum Rollers Service Repair Manual.pdfkm7seydwuhdw
The document provides a maintenance table for a single drum roller that outlines maintenance work to be performed at various operating hour intervals. It lists over 40 maintenance items ranging from daily checks of fluid levels to annual tasks like changing engine oil and filters. Performing regular maintenance per the schedule is important to ensure the machine is ready for demanding construction work and all safety systems function properly.
Caterpillar cat 950 k wheel loader (prefix j5m) service repair manual (j5m000...wedsrffcdgdv
This document provides instructions for removing and installing the crankshaft front seal on a Caterpillar 950K wheel loader. It describes using a special tool to press the seal out of and into the front cover. Cleanliness is emphasized to prevent premature wear. The instructions are part of a service manual for Caterpillar C7.1 engines.
Caterpillar cat 950 k wheel loader (prefix fer) service repair manual (fer000...wedsrffcdgdv
The document provides instructions for removing and installing a secondary steering pump and electric motor on a Caterpillar 950K wheel loader. It describes 28 steps to disassemble the steering pump, including removing valves, spools, springs, and other internal components. It then lists 34 steps for reassembling the steering pump. The summary advises checking axial shaft end play during installation and adjusting as needed with a shim.
This document provides instructions for disassembling a piston pump used in Caterpillar articulated trucks. It begins by listing the required tools. It then provides step-by-step instructions to disassemble the various components of the pump, including removing seals, springs, valves, and housing pieces. Detailed illustrations accompany each step. Safety notices are included to warn of potential injuries from released springs or pressurized components. The disassembly process yields all individual parts of the pump.
This document provides instructions for removing and installing a piston pump and pump control valve on a 725 Articulated Truck. It outlines 37 steps to disassemble the piston pump, checking components for wear, lubricating seals, and precisely adjusting preload on bearings. It then describes 4 steps to install the piston pump and connect hoses. Finally, it warns of hot oil and pressures in the hydraulic system and lists 1 step to remove identification marks from hoses when removing the pump control valve.
Caterpillar cat 336 f l excavator (prefix yfd) service repair manual (yfd0000...wedsrffcdgdv
This document provides instructions to disassemble a 336F excavator travel motor. It outlines 27 steps to remove components such as the motor head assembly, springs, seals, relief valves, plugs and more. Tools required include a transmission repair stand, lifting eye assembly, driver group, retaining ring pliers and other specialized tools. Safety precautions are provided to release spring forces and contain fluids.
Caterpillar cat 336 f l excavator (prefix nbl) service repair manual (nbl0000...wedsrffcdgdv
This document provides instructions for disassembling and assembling the travel motor of a 336F excavator. It begins by listing the required tools. The 30 step disassembly procedure describes how to remove components like springs, seals, plates, and housing pieces. The 28 step assembly procedure describes how to reinstall these components in reverse order and includes notes on lubrication and proper positioning. Personal safety cautions are provided throughout for parts under spring tension.
Caterpillar cat 336 f l excavator (prefix lcl) service repair manual (lcl0000...wedsrffcdgdv
This document provides disassembly instructions for a travel motor on a 336F excavator model. It outlines 27 steps to fully disassemble the travel motor, including removing the motor head assembly, piston assemblies, barrel assembly, swashplate, and other internal components. Various tools are required to remove retaining rings, seals, springs, and other parts in the proper sequence. Care must be taken to mark components' locations and ensure springs and other parts are released safely.
Caterpillar cat 336 f l excavator (prefix dsw) service repair manual (dsw0000...wedsrffcdgdv
This document provides instructions for disassembling the travel motor on 336F and 336F L excavator models. It outlines 27 steps to fully disassemble the travel motor, including removing the motor head assembly, piston assemblies, barrel assembly, friction plates, seals, springs, and other internal components. Detailed illustrations are provided to identify each part mentioned in the procedure. Safety notices advise wearing protective equipment when compressing springs or releasing pressurized components during disassembly.
Caterpillar cat 336 f excavator (prefix yfd) service repair manual (yfd00001 ...wedsrffcdgdv
This document provides instructions to disassemble a 336F excavator travel motor. It lists 27 steps to fully disassemble the travel motor, including removing components like the head, springs, pistons, plates, seals and more. Tools required include bolts, pins, drivers, pullers and stands to safely remove parts and release spring forces. Detailed illustrations accompany each step to show how to disassemble the various systems and components of the travel motor.
Caterpillar cat 336 f excavator (prefix nbl) service repair manual (nbl00001 ...wedsrffcdgdv
This document provides instructions for disassembling and assembling the travel motor of a 336F excavator. It begins by listing the required tools. The 30 step disassembly procedure describes how to remove components like springs, seals, plates, and housing pieces. The 28 step assembly procedure describes how to reinstall these components in reverse order and includes notes on lubrication and proper positioning. Personal safety warnings are provided throughout for components under spring pressure.
Caterpillar cat 336 f excavator (prefix lcl) service repair manual (lcl00001 ...wedsrffcdgdv
This document provides instructions for disassembling the travel motor on a 336F and 336F L excavator. The 27-step process includes removing components like the motor head assembly, piston assemblies, barrel assembly, swashplate, and seals. Special tools are required to remove parts and release spring forces safely. The detailed illustrations and part numbers allow technicians to accurately disassemble and reassemble the travel motor.
Clark esm 12 25 forklift service repair manualwedsrffcdgdv
This document provides maintenance instructions for an electric lift truck. It outlines a planned maintenance program with periodic inspections and maintenance tasks to complete. The inspections and tasks are divided into groups to make the maintenance efficient. Safety practices for maintenance are also described. Completing regular planned maintenance is important for the safe operation and long life of the lift truck.
Clark cq202530 l forklift service repair manualwedsrffcdgdv
The document provides information on servicing and maintaining the CQ20-30 truck transaxle:
- The transaxle construction includes a torque converter, single-speed transmission, differential, drive axle, and drum brakes. Maintenance includes checking fluid levels, changing fluid and filters regularly, and adjusting the service brakes.
- Precautions for disassembly and assembly emphasize cleanliness to prevent contamination. The transaxle has openings for checking fluid levels and draining fluid. Filters should be replaced every 1,000 hours.
- Brake adjustments can be made through openings in the backing plate or wheel hub, aiming for a brake shoe to drum clearance of 0.255-0.304
Clark cq202530 d forklift service repair manualwedsrffcdgdv
The document provides information on servicing the CQ20-30 transaxle:
- It describes the construction of the TA18 transaxle assembly and its components.
- Maintenance procedures are outlined, including checking fluid level and changing fluid and filter every 1,000 hours.
- Pressure specifications and check points for the regulator valve, converter, clutches, and other components are provided.
- The process for adjusting the service brakes via the backing plate or wheel hub opening is described in detail. Cleanliness and proper adjustment are emphasized to prevent issues.
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Bomag BW 177 Single Drum Rollers Service Repair Manual.pdfkm7seydwuhdw
This document provides technical data and adjustment values for the BW 177 DH Series 4 single drum roller, including specifications for the Deutz diesel engine, hydrostatic travel pump, drum drive motor, vibration pump, steering pump, rear axle, and recommended filling capacities. The machine's serial number range and component manufacturers are also listed. Key specifications include an engine power of 74.9 kW at 2200 rpm, a travel pump maximum displacement of 56 cm3/rev, and a drum drive motor displacement of 60 cm3/rev in stage 1.
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The document provides a maintenance table for a single drum roller that outlines maintenance work to be performed at various operating hour intervals. It lists over 40 maintenance items ranging from daily checks of fluid levels to annual tasks like changing engine oil and filters. Performing regular maintenance per the schedule is important to ensure the machine is ready for demanding construction work and all safety systems function properly.
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Caterpillar cat 950 k wheel loader (prefix j5m) service repair manual (j5m000...wedsrffcdgdv
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2. Service Training
Variocontrol Single Drum Rollers Series 4
Table of contents
Foreword A 1
Documentation A 2
General B 1
Peculiarities B 3
Electric steering C 1
Steering circuit C 2
Steering pump C 4
Steering wheel C 5
Steering valve C 6
Steering angle sensor C12
Trouble shooting C15
Compaction measuring system D 1
BEM D 1
BTM plus D 2
BTM prof. D 3
BVC D 4
BVC - System E 1
Exciter system E 4
Gear pump E 5
Valve block E 7
Swashing motor E 9
Acceleration transducer E 10
MESX-control E 11
BOP E 12
Working principle of the system F 1
3. Service Training
Variocontrol Single Drum Rollers Series 4
Repair and adjustments G 1
Replacement of swashing motor G 2
Replacement of potentiometer G 3
Potentiometer adjustment G 4
Trouble shooting H 1
Electrics I 1
Service Training
MESX - Service Training
Wiring diagram
Hydraulic diagrams
4. Service Training
Variocontrol Single Drum Rollers Series 4 - A 1 -
Foreword
Reliable construction equipment is of greatest advantage for all parties involved:
• for the customer/user it is a basis for an exact calculation of utilization periods and the completion of
projects as scheduled.
• in the rental business it means that the equipment can be reliably used and planned without having
to stock a large number of stand-by machines.
• for the manufacturer it means that customers are satisfied, provides him with a good image and gives
him a feeling of confidence.
It is BOMAG’s philosophy to design and produce the machines with highest possible reliability. This
aspect of simple and easy maintenance was one of the key issues when developing and designing the
machine:
• the location of components in the machine eases maintenance work,
• the high quality standard of BOMAG is the basis for the considerable extension of the service and
maintenance intervals.
• the After Sales Service of BOMAG, including excellent operating and maintenance instruction
manuals, high quality training courses and on-site machine demonstrations helps the customer to
maintain their machines in good condition over a long period of time.
Permanent training of BOMAG’s own service personnel as well as the service personnel of BOMAG
Profit Centres and dealers is therefore a general prerequisite for BOMAG’s excellent world-wide service.
This program of permanent training is only possible with appropriate and up-to-date training material for
trainers as well as persons attending the training courses.
This training manual has not only been written as a support for the professional work of the trainer, but
also for the trainees attending these training courses.
The different levels of product training demand, that the training performed by BOMAG, its Profit Centres
or its dealers reflects the high quality of the training conducted at the Training Centre at BOMAG in
Boppard. For this reason we invested a lot of time in the preparation of these materials .
The structure of this training manual enables us to change or up-date individual chapters in case of
alterations to the machine.
5. Service Training
Variocontrol Single Drum Rollers Series 4 - A 2 -
Documentation
These Variocontrol training documents are valid for the following single drum rollers of series 4:
BW 177 DH-4 BVC
BW 213 DH-4 BVC
BW 213 DH-4 BVC + vibratory plates
BW 226 DH-4 BVC
For the BOMAG machines described in this training manual the following documentation is additionally
available:
Attention!
The currently valid part numbers for the documents can be taken from the Doclist or the
Customer Service page in the BOMAG (BOMAG Secured Area) in accordance with the serial
number of the machine.
1. Operating and maintenance instructions
2. Spare parts catalogue
3. Wiring diagram *
4. Hydraulic diagram *
5. Repair instructions
6. Service Information
* The document versions valid at the date of printing are part of this training manual.
6. Service Training
Variocontrol Single Drum Rollers Series 4 - B 1 -
General
BOMAG VARIOCONTROL (BVC)
The increased demands concerning quantity and quality in the application and compaction of soils and
rolled asphalt inevitably requires a permanent further development of vibratory rollers.
From the contractor's point of view a vibratory roller must fulfil three major requirements:
1. efficient operation
2. fulfilment of a task according to specification
3.flexible in use
Due to the inflexible parameterization, standard compaction systems are not able to adapt to the
permanently changing construction conditions in an optimal way.
However, this problem can be solved by the introduction of intelligent compaction systems. The control
values required for an automatic optimization of the compaction parameters are directly gained from the
interaction between drum and material to be compacted.
BOMAG VARIOCONTROL is a compaction system, which improves the quality and reproducibility of
compaction and enhances the efficiency of the roller, independently from the roller operator.
BOMAG VARIOCONTROL offers the user the following advantages:
1.Automatic adaptation of the emitted compaction energy to the actual compaction status
2. Better, reproducible results on all materials
3.No jump operation and therefore no particle destruction or loosening of material
4. The resulting direction of force is automatically adapted to the travel direction. This improves the
surface quality of the material and the gradability of the roller.
5.Low vibration loads for driver and environment
The further development of the VARIOCONTROL system for earthwork was founded on experiences
gained with the VARIOMATIC system used for asphalt compaction . The basic difference between
VARIOCONTROL and VARIOMATIC is the new exciter system.
It meets the demands of many users for an "intelligent" roller with automatic adaptation
of compaction.
7. Service Training
Variocontrol Single Drum Rollers Series 4 - B 2 -
Part of this new further development is the new display and control element BOP (Bomag
Operation Panel) in connection with the MESX.
Besides the display of the entire operation of the measuring technology the BOP also enables a simple
self diagnose of the overall system.
The operation of the BOP is described in detail in the operating and maintenance instructions.
Error and input codes can be found on the electrics page (MESX Service Training).
BOP ----- Bomag Operation Panel
8. Service Training
Variocontrol Single Drum Rollers Series 4 - B 3 -
Specialities
All BVC single drum rollers of series 4 are equipped with an electric steering
system as standard.
The hydraulic steering is also available as an option.
9. Service Training
Variocontrol Single Drum Rollers Series 4 - C 1 -
Electric steering
The electric steering consists of an electronically controlled closed control loop and a hydraulic steering
circuit.
The electronically controlled circuit consists of a small electric steering wheel (in the left hand seat
armrest), the ESX-control (located in the electric junction box), which converts the signal from the
steering wheel into electric signals for the proportional solenoids of the steering valve and the
steering angle sensor (located on the articulated joint), which feeds the steering angle back to the
control.
The hydraulic steering circuit consists of steering pump, high pressure filter, steering valve and
steering cylinders.
10. Service Training
Variocontrol Single Drum Rollers Series 4 - C 4 -
Emergency steering:
The emergency steering valve is only an option and can only be operated via a special
input code. The valve is supplied by the additional Variocontrol gear pump.
Pos. Designation Pos. in wiring diagram Pos. in hydraulic
diagram
Measuring values
05 one steering cylinder on BW 177 05
05 two steering cylinders
on BW 213 and 226
05
06 Steering valve with 2 proportional
solenoids and an integrated
accumulator
Y92 / Y93
Page 006
06
07 High pressure filter 12µm 07
09 Steering pump and charge pump 09 / MB 200 +/-10 bar
17 additional gear pump 5.5 cm³ on
BW 177 BVC
17 / MG 80 bar
17 additional gear pump 8 cm³ on BW
213 and 226 BVC
17 / MG 120 bar
20 High pressure line filter for
Variocontrol 100 µm
20
21 Optional emergency steering valve
with 2 B/W solenoids
Y112 / Y113
Page 006
21
11. Service Training
Variocontrol Single Drum Rollers Series 4 - C 5 -
Steering pump with filter
Steering pressure
Steering pump
Pressure test port
12 µm with
Steering circuit
High pressure filter
Pressure differential switc
3,5 bar
Filter outlet
Filter inlet
12. Service Training
Variocontrol Single Drum Rollers Series 4 - C 6 -
Steering wheel
The small steering wheel is located in the left hand armrest of the driver's seat
Pos. Designation Pos. in wiring diagram Pos. in hydraulic
diagram
Measuring values
Electric steering wheel A 45
Page 006
VCC 8,5 V
13. Service Training
Variocontrol Single Drum Rollers Series 4 - C 7 -
Steering valve, electrically proportional
The steering valve, together with the optional emergency steering valve, is located
behind a protection box on the right hand side of the frame under the operator's stand
or the cabin.
to the
Steerin
cylinder
from the
to the charge
system
pump
14. Service Training
Variocontrol Single Drum Rollers Series 4 - C 8 -
Steering valve
Pos. Designation Pos. in wiring diagram Pos. in hydraulic
diagram
Measuring values
1 Steering valve port P 06
2 Steering valve port T 06
3 Steering valve ports A and B 06
4 Steering valve, pressure relief valve 06 175 + 25 bar
5 Steering valve, shock valves 06 230 bar
6 Steering valve, accumulator 06 Accumulator
pressure 50bar
7 Steering valve, prop. solenoid Y 93 Page 006 0,4 - 1,2 A
8 Steering valve, prop. solenoid Y 92 Page 006 0,4 - 1,2 A
9 Emergency steering valve B/W
solenoid
Y 113 Page 006 0/12 V
10 Emergency steering valve B/W
solenoid
Y 112 Page 006 0/12 V
1 2
3
4
5
6
7 8
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16. Service Training
Variocontrol Single Drum Rollers Series 4 - C 9 -
Emergency steering valve (option, can only be operated via input code) !!!
9
10
17. Service Training
Variocontrol Single Drum Rollers Series 4 - C 10 -
BW 177 BVC
Pos. Designation Pos. in wiring diagram Pos. in hydraulic
diagram
Measuring values
1 Steering valve Y92 / Y93 06
2 Optional emergency steering valve Y112 / Y113 21
3 High pressure line filter 100µm in
Vario-circuit
20
1
2
3