Power Steering Pumps - Heavy Haulers RV Resource Guide
Contents
1. Service Procedures 7 Check that the control valve does not bind in the body If binding is evident replace the control valve N CAUTION Improper equipment operation may occur if the control valve is not in the same tolerance group as the pump housing The valve and the pump housing are stamped with corresponding numerals to indicate the tolerance group such as 1 on the pump and on the valve or 2 and Il Replacing the valve with a valve of the wrong tolerance group could result improper control valve operation and pump damage 8 If the control valve is to be reused disassemble the valve using pliers clamped over the hole in the side of the valve H Clean and inspect the valve components If any of the valve parts are damaged replace the complete valve assembly If the valve is not damaged lubricate the parts with oil and reassemble the valve Note Ensure the same number of washers are used during valve assembly that were removed during disassembly The number of washers determines control valve operating pressure Assembly N CAUTION When the pump is overhauled always replace all O rings and support rings in the pump Failure to replace these parts could result in pump failure Group 64 Power Steering Pumps Service Procedures 4 Using drift 9992996 1 press the needle bearing 2 in until the drift bottoms in the pump body 9992996 W6000015 2 Apply grease between the seal lips and i2. Possible component damage All power steering pump components must be lubricated with power steering fluid during assembly Failure to lubricate pump components could result in pump damage when it is operated Special tools 9991459 9991801 9991866 9992337 9992996 9992997 9994113 9994150 9995433 9995434 9996173 9996178 ZF Disassembly 1 Clean the outside of the pump body Remove and discard the external O ring from the body Possible component damage Use protective jaw caps on the vise Failure to do so can cause damage to the pump Clamp the drive gear in a vise with protective jaw caps Remove the drive gear nut 28 Group 64 Power Steering Pumps N rasse W r gaan WOCH IO 5 A UCI Vu N E A imf iia KG Leg S W s DE DE IE EER N N Q W6000007 A oy U 00 ge ER W6000008 Service Procedures 3 Place the pump in a vise Use puller 9995434 1 and 9995433 2 to remove the drive gear 9995433 9995434 4 Remove the lock ring and the end cap Note Be careful not to lose the spring under the cap 5 Remove the outer plate 1 6 Turn the pump over and take out the rotor vanes and cam ring 7 Remove the two guide pins 29 Group 64 Power Steering Pumps W6000009 W6000010 30 Service Procedures 8 Remove the snap ring 1 from the drive bearing end of the p
3. Power Steering Pumps Service Procedures 6453 06 02 01 Hydraulic Pressure Test See General Work Practices page 17 for important service information before beginning this procedure Before working on a vehicle set the parking brakes place the transmission in neutral and block the wheels Failure to do so can result in unexpected vehicle movement and can cause serious personal injury or death W6000052 Test meter connected for pressure flow checks Power steering reservoir Power steering pump Return line Pressure line Steering gear Gauge J26487 Tool J38282 Tool J35545 Tool J35545 O OO JO Om P Go M 1 Install a flow meter with a pressure gauge 20 Group 64 Power Steering Pumps Service Procedures AP CAUTION Potential pump damage Do NOT leave the shut off valve fully closed for more than 5 seconds Leaving the shut off valve fully closed too long could result in excessive fluid temperatures and pump damage Close the shut off valve and read the pressure gauge Immediately open the shut off valve 3 If pump pressure was below the minimum value listed on the pump nameplate repair or replace the pump 4 Allow the fluid to cool to 52 57 C 125 135 F before performing other tests or shutting off the engine 21 Group 64 Power Steering Pumps Service Procedures 6453 06 02 02 Power Steering Pump Flow Test See General Work Practices page 17 for important service infor
4. ee De ee 36 Eege 44 Power Steering Pump Installation 54 Feedback Operation Numbers Group 64 Power Steering Pumps Power Steering Pumps General Power Steering Pumps W6001351 This service manual describes the design function operation and service procedures ofthe ZF Vickers and LuK power steering pumps installed on all models of Volvo Trucks Group 64 Power Steering Pumps Specifications Specifications Power Steering Pump Note Due to customer preferences the actual pump installed on any vehicle may vary from the chart bellow Direct any questions concerning this information to Volvo Trucks North America Engine een ne rotation reret ma VE 12 TAS65 85 M100 VT72 CW 2175 20 dia straight shaft w key 150 DD S60 TAS65 85 M100 LF73 CCW 2175 11 tooth spline 150 CU N14 TAS65 85 M100 LF73 CW 2175 11 tooth spline 150 CU ISX TAS65 85 M100 LF73 CW 2175 11 tooth spline 150 CAT 3406 TAS65 85 M100 LF73 CW 2175 11 tooth spline 150 CU M11 ISM TAS65 85 M100 LF73 CCW 2175 11 tooth spline 150 VE 12 P 3039 TAS65 85 M100 VT72 CW 2175 20 dia straight shaft w key 150 VE 7 P 3028 TAS65 85 M100 VT79A CCW 2175 20 dia straight shaft w key 150 Engine re Type Rotation pu sn o Group 64 Power Steering Pumps Tools Tools Standard Tools Power steering pump maintenance requires the use of many tools that are part of a technician s normal tool set In addition the following tools are r
5. excessive fluid temperatures and pump damage Fully close the shut off valve When pump relief pressure is reached verify the flow rate is zero Immediately open the shut off valve Verify the flow rate rapidly returns to the value previously noted for governed engine rpm 8 Allow the fluid to return to 52 57 C 125 135 FF 9 If flow rate did not immediately return to the noted flow rate the pump is malfunctioning and should be repaired or replaced 10 If flow rates for idle and governed engine rpm were not within specification see Power Steering Pump page 5 the pump is malfunctioning and should be repaired or replaced 23 Group 64 Power Steering Pumps Service Procedures 6459 05 03 01 Power Steering Hydraulic System Bleeding See General Work Practices page 17 for important service information before beginning this procedure Note Ensure steering gear poppets are set prior to performing this procedure 1 Before working on a vehicle set the parking brakes place the transmission in neutral and block the wheels Failure to do so can result in unexpected vehicle movement and can cause serious personal injury or death N WARNING HOT ENGINE Keep yourself and your test equipment clear of all moving parts or hot engine parts and or fluids A hot engine and or fluids can cause burns or can permanently damage test equipment N WARNING Always wear appropriate eye protection to preven
6. lubricate the parts with oil and reassemble the valve Note Ensure the same number of washers are used during valve assembly that were removed during disassembly The number of washers determines control valve operating pressure Group 64 Power Steering Pumps W6001353 W6001348 Service Procedures Assembly N CAUTION When the pump is overhauled always replace all O rings in the pump Failure to replace these parts could result in pump failure 1 Assemble the cartridge as follows a Place the inner wear plate on a flat surface with the side with the stamped numbers and machined surface facing up b Place the cam ring on the inner wear plate Place the rotor in the cam ring Install the vanes in the rotor with the rounded and polished edges toward the outside e Place the outer plate on the cam ring with stamped numbers and machined surface facing the rotor a0 2 Grease a new shaft seal and press it into the housing 3 If bearing type pump press a new bearing on the shaft and secure it with the small snap ring 4 Install the shaft into the flange Tap the shaft into the flange using a plastic tipped hammer Install the large snap ring 91 Group 64 Power Steering Pumps Service Procedures 5 Install new O rings on the flange W6000792 6 Insert the guide pins into the holes in the flange W6001344 7 Install the cartridge on the flange Ensure the thinner end plate is again
7. of our literature your opinions and experience when using this manual would be greatly appreciated If you have any comments or suggestions make a copy of this page write down your comments and send them to us either via telefax or mailing directly to the address listed below To From Volvo Trucks North America Inc Dept 516 Service Publications 7825 National Service Road EE RE EE A a LE LE N EE EE P O Box 26115 Greensboro NC 27402 6115 7777 memes USA Fax 336 393 3170 Comments proposals Operation Numbers 0493 06 02 01 Hydraulic Pressure TEST ii sussa ei at 20 6455 00 02 02 Fower Steering Fumo EE 22 6459 05 03 01 Power Steering Hydraulic System Bleeding 24 6453 01 01 01 Power Steering Pump Removal ana eu 26 6453 04 04 01 Power Steering Pump Overhaul iese ee ee ee EE Re RR Ee RR EE ee ee EE ee ee EE ee ee Ee ee ee EE ee ee Ee ee ee ee ee Ee ee 28 6453 02 01 01 Power Steering Pump Isa EN aaa 54 VOLVO Volvo Trucks North America Inc P O Box 26115 Greensboro NC 27402 6115 Volvo Trucks Canada Ltd 5600A Cancross Court Mississauga Ontario L5R 3E9 http www volvotrucks volvo com PV776 TSP194907 1000 08 2003 Volvo Trucks North America Inc 2003
8. to the rear ofthe control valve 4 through the connection channel 5 Due to the orifice the pressure in the connection channel and in the rear of the control valve is slightly lower than the pressure in the delivery channel As pump output pressure increases due to higher engine speed the delivery channel pressure rises enough to overcome the force of the spring 6 behind the control valve forcing the valve open to the right to allow some of the oil to flow back to the suction side of the pump 10 This action limits pump output pressure and is determined by the control valve spring W6001350 Pressure Relief Valve The control valve has another valve located inside it This is the pressure relief valve The pressure relief valve is either a ball valve 7 or a needle valve that is held closed by a spring 8 Oil pressure is supplied to the relief valve through a drilled passage in the rear of the control valve 4 piston In the event the pump flow is stopped e g the steering gear is blocked the pressure in the connection line 5 will be equal to the delivery line pressure and the control valve 4 will be forced back to its normal position closing off the passage to the suction side of the pump This action will cause pump pressure to rise even more When maximum pressure is reached the ball valve 7 will be forced open against the spring 8 providing a passage for oil flow back to the suction side of the pump 10 Thi
9. F 2B M M26 X 1 5 P 1 06 12 UNF 2B U 1 31 12 UNF 2B Direction of Rotation L Left Hand CW R Right Hand CCW Relief Valve Pressure 135 135 7 bar 1 960 100 psi 150 150 7 bar 2 175 100 psi Controlled Flow 12 12 0 liter minute 3 2 gal min 14 14 0 liter minute 3 7 gal min 16 16 0 liter minute 4 2 gal min CW Clockwise 19 19 0 liter minute 5 0 gal min CCW Counter Clockwise 23 23 0 liter minute 6 1 gal min Seen From Back of Pump Theoretical Displacement 17 17 0 cm rev 1 0 in rev 21 20 9 cm rev 1 3 in rev Flange Type Front End Bearing 72 2 Hole VT Ball Bearing 73 SAE A LF Bushing v640596 W6000866 16 Group 64 Power Steering Pumps Service Procedures Service Procedures General Work Practices To ensure personal safety and to help avoid accidental damage to power steering pump components always follow these guidelines any time work is performed on the power steering pump iN DANGER Before working on a vehicle set the parking brakes place the transmission in neutral and chock the wheels Failure to do so can result in unexpected vehicle movement and can cause serious personal injury or death N CAUTION Improper equipment operation may occur if the control valve is not in the same tolerance group as the pump housing The valve and the pump housing are stamped with corresponding numerals to indicate the toleranc
10. N Component damage may occur if the cleanliness of the hydraulic system is not maintained The area around any component to be disconnected should be cleaned prior to disconnecting Used hydraulic fluid should never be put into the hydraulic system Failure to follow these precautions could result in damage to the steering system hydraulic components E O ly id S N 0 N A EC UN 5 Spline driven pump Engine flange Gasket Drive coupler Pump flange Washer Mounting bolt OO P Go M 26 Group 64 Power Steering Pumps Service Procedures Gear driven pump Mounting hole O ring Drive gear Pump flange Mounting bolt 0O POND A 1 Place a drain pan under the vehicle to catch power steering fluid 2 Disconnect the two fluid lines from the pump 3 Remove the two mounting bolts and pull the pump off the engine 4 Clean the mating surfaces on the engine and on the pump 27 Group 64 Power Steering Pumps Service Procedures 6453 04 04 01 Power Steering Pump Overhaul See General Work Practices page 17 for important service information before beginning this procedure N WARNING Always wear appropriate eye protection to prevent the risk of eye injury due to contact with engine debris or fluids Possible component damage Strict cleanliness must be observed when performing power steering pump maintenance Dirt in the hydraulic system can damage the power steering pump or steering gear
11. Service Manual Trucks Group 645 602 Power Steering Pumps ZF Vickers LuK All Models PV776 15P194907 VOLVO Foreword The descriptions and service procedures contained in this manual are based on designs and methods studies carried out up to August 2003 The products are under continuous development Vehicles and components produced after the above date may therefore have different specifications and repair methods When this is believed to have a significant bearing on this manual supplementary service bulletins will be issued to cover the changes The new edition of this manual will update the changes In service procedures where the title incorporates an operation number this is a reference to an V S T Volvo Standard Times Service procedures which do not include an operation number in the title are for general information and no reference is made to an V S T The following levels of observations cautions and warnings are used in this Service Documentation Note Indicates a situation handling or circumstance which should be observed Caution Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury or damage to property Warning Indicates a potentially hazardous situation which if not avoided could result in death serious injury or major damage to property Danger Indicates an imminently hazardous situation which if not avoided will result in death or serio
12. driven pump Engine flange Gasket Drive coupler Pump flange Washer Mounting bolt OO PS Go M Group 64 Power Steering Pumps Service Procedures 3 For spline driven pumps place a gasket on the pump For gear driven pumps install an O ring on the pump Gear driven pump Mounting hole O ring Drive gear Pump flange Mounting bolt 0O P Go h 4 Install the pump on the engine Torque the mounting bolts to 46 1 Nm 34 1 ft lb N CAUTION Component damage may occur ifthe cleanliness of the hydraulic system is not maintained The area around any component to be disconnected connected should be cleaned prior to disconnecting connecting Used hydraulic fluid should never be put into the hydraulic system Failure to follow these precautions could result in damage to the steering system hydraulic components 46 1 Nm 34 1 ft lb 5 Connect the two fluid lines to the pump Using a plastic cable tie strap the fluid lines together to prevent them from rubbing on the frame 6 Fillthe reservoir with power steering fluid and bleed the system in accordance with the hydraulic system bleeding service procedure Verify there is no leakage in the system 55 96 Feedback One of our objectives is that workshop personnel should have access to correct and appropriate service manuals where it concerns fault tracing repairs and maintenance of Volvo trucks In order to maintain the high standards
13. e group such as 1 on the pump and on the valve or 2 and Il Replacing the valve with a valve of the wrong tolerance group could result improper control valve operation and pump damage AP CAUTION Component damage may occur if the cleanliness of the hydraulic system is not maintained The area around any component to be disconnected connected should be cleaned prior to disconnecting connecting Used hydraulic fluid should never be put into the hydraulic system Dirt in the hydraulic system can damage the power steering pump or steering gear Failure to follow these precautions could result in damage to the steering system hydraulic components N WARNING HOT ENGINE Keep yourself and your test eduipment clear of all moving parts or hot engine parts and or fluids A hot engine and or fluids can cause burns or can permanently damage test equipment Group 64 Power Steering Pumps Service Procedures N WARNING Always wear appropriate eye protection to prevent the risk of eye injury due to contact with engine debris or fluids N CAUTION Possible component damage All power steering pump components must be lubricated with power steering fluid during assembly Failure to lubricate pump components could result in pump damage when it is operated AP CAUTION Possible component damage Use protective jaw caps on the vise Failure to do so can cause damage to the pump N CAUTION When the pump is overhauled always rep
14. e seal surface and at the wear surface for the bushing if bushing type pump Inspect the splines and threads for damage Replace the shait if necessary 47 Group 64 Power Steering Pumps Service Procedures 3 Check the bushing for wear small bushing on gear ye driven pumps large bushing on spline driven pumps If damaged replace the bushing as follows a Press the bushing out using a suitable drift b Press a new bushing in flush with the inner flange surface a DE Ze we Beat W6001349 48 Group 64 Power Steering Pumps Service Procedures 4 Separate the parts of the cartridge wear plates cam ring rotor and vanes W6001346 5 Check the outer and inner plates of the cartridge for wear and scoring Pay particular attention to the surfaces that ride against the rotor Check the rotor cam ring and vanes for wear Ensure the vanes fit easily in the rotor If replacement is necessary the rotor vanes and cam ring must be replaced as a unit 6 Check that the control valve does not bind in the body If binding is evident replace the control valve 7 If the control valve is to be reused disassemble the valve using pliers clamped over the hole in the side of the valve W6001347 49 Group 64 Power Steering Pumps 50 Service Procedures 8 Clean and inspect the valve components If any of the valve parts are damaged replace the complete valve assembly If the valve is not damaged
15. embly 4 Remove the O ring or gasket from the pump flange Possible component damage Use protective jaw caps on the vise Failure to do so can cause damage to the pump If the pump has a drive gear clamp the drive gear in a vise with protective jaw caps and remove the drive gear nut 3 If the pump has a drive gear place the pump in a vise o EL Use puller 9995433 1 and 9995434 2 to remove the GA drive gear i P F eg 1 A HE 9995433 d vi E 9995434 eh HD Th TEITE GEL TUTTI TTY N Mu al W6000007 44 Group 64 Power Steering Pumps Service Procedures 4 Remove the plug spring and control valve from the control valve port W6000794 5 Remove the four housing bolts Separate the housing gt from the flange W6000791 45 Group 64 Power Steering Pumps W6000792 ehe ed De en ee N W6001345 46 Service Procedures 6 Remove the cartridge from the housing Keep the cartridge together so the valves stay in place 7 Remove the large snap ring from the shaft Tap the shaft out of the flange with a plastic tipped hammer Group 64 Power Steering Pumps W6001352 Service Procedures 8 If the shaft has a bearing remove the small snap ring which holds the shaft seal Press the shaft out of the bearing 9 Remove the shaft seal from the flange Cleaning and Inspection 4 Thoroughly clean all parts of the pump 2 Check the shaft for wear at th
16. equired to perform maintenance procedures on the power steering pump Torque wrench Special Tools The following special tools are required for work on power steering pumps The tools can be ordered from a Volvo Parts dealer 9991459 9991866 9992337 a i z 9992996 9994113 9994150 9996075 i 9985433 9985434 9986173 9986178 9991459 Drift 9994113 Sleeve 9991801 Handle 9994150 Sleeve 9991866 Drift 9996075 Sleeve 9992337 Pry bar 9985433 Puller 9992996 Drift 9985434 Puller 9992997 Spindle 9996173 Puller 9992658 Drift 9996178 Expander Group 64 Power Steering Pumps Tools Special Eduipment The following special eduipment is reguired for testing the steering system This equipment can be ordered from Kent Moore by calling 1 800 328 6657 Flowmeter J26487 with pressure gauge Group 64 Power Steering Pumps Design and Function Power Steering Pump Description Power steering pumps installed on Volvo Trucks vehicles are from one of three manufacturers ZF Vickers and LuK All three pumps are vane pumps with integral control and relief valve Operation of the three type pumps is similar The major difference between the pumps is the location of the control and relief valve assembly With ZF and Vickers pumps the control and relief valve assembly is located adjacent and perpendicular to the shaft On the LuK pump the control and relief valve is directly behind the shaft Each pump manufactur
17. er produces pumps with different ratings and specifications to accommodate the many engine and steering combinations ZF Vickers and LuK power steering pumps are vane type pumps designed to deliver high pressure fluid to the power steering gear The pump body contains the pump assembly and the pressure control valve assembly Power steering pumps are either belt driven by the engine crankshait or direct driven by a gear in the engine timing cover Pump rotation can be either clockwise or counterclockwise depending on the engine manufacturer and model and is indicated by an arrow on the cover at the rear of the pump There are two types of drive available with the LuK pumps a gear or an eleven tooth spline The splined shaft design does not generate excessive axial forces allowing the shaft bearing design to be replaced with a bushing Refer to LuK Power Steering Pump page 15 for LuK pump design variations Power Steering Pump Group 64 Power Steering Pumps Operation The pump shait 1 is turned by the engine through a gear or a spline which also turns the rotor 2 The vanes 3 which are in slots in the rotor move with the rotor as well and are forced outward against the cam ring 4 by a combination of centrifugal force and hydraulic pressure The cam ring is round on the outer edge to fit into the pump body but oval on the inside to allow the vanes to move outward and then inward When the rotor turns the volume of t
18. he space between the rotor cam ring and any two of the vanes changes causing a change in the fluid pressure in that area When two vanes move past the suction channel 5 the area between them increases creating a suction and trapping hydraulic fluid The fluid is moved by the vanes along the inside of the cam ring When the vanes approach the outlet channel side ofthe cam ring the area between them becomes smaller causing the pressure to increase which forces the oil out into the delivery channel 6 The inner plate 7 guides oil from the reservoir to the suction channel 5 The outer plate directs the high pressure oil to the delivery channel 6 and to the rotor and vanes for lubrication 10 en Power Steering Pump W6000005 W6000004 Group 64 Power Steering Pumps Power Steering Pump Delivery channel Delivery line Orifice Control valve Connection channel Spring Relief valve Relief valve spring Relief passage O Suction channel 00 JO Om BOON Control Valve The function of the control valve is to regulate pump pressure and flow The physical design of the control valve on the LuK pump differs from that of the ZF and Vickers pump but the principle of operation is the same During normal operation hydraulic fluid under pressure from the pump passes through the delivery channel 1 the orifice 2 and out the delivery line 3 to the steering gear Fluid is also delivered
19. lace all O rings and support rings in the pump Failure to replace these parts could result in pump failure 1 Always park the vehicle on a level surface chock the front wheels and release the parking brakes 18 Group 64 Power Steering Pumps Service Procedures N WARNING Personal injury hazard A faulty power steering pump high pressure relief valve may not relieve pump pressure Closing the high pressure shut off valve may cause sever pump damage or high pressure hoses to rupture Watch the pressure closely when closing the shut off valve If pressure rises rapidly or exceeds 17236 kPa 2500 psi immediately open the shut off valve Failure to follow these precautions could result in severe equipment damage or personal injury N WARNING Never check for leaks with your hands Oil released under high pressure can penetrate the skin causing severe injury Determine the pump minimum output pressure from the pump nameplate 3 Install a steering system analyzer in the high pressure fluid line between the pump and the steering gear The analyzer should include a pressure gauge flow meter and shut off valve 4 Place a thermometer in the fluid reservoir 5 Start the engine and warm the hydraulic system by partially closing the shut off valve until the pressure gauge reads 6900 kPa LU 000 psi When fluid temperature reaches 52 57 C 125 135 F open the shut off valve 6900 kPa 1000 psi Group 64
20. mation before beginning this procedure Before working on a vehicle set the parking brakes place the transmission in neutral and block the wheels Failure to do so can result in unexpected vehicle movement and can cause serious personal injury or death W6000052 Test meter connected for pressure flow checks Power steering reservoir Power steering pump Return line Pressure line Steering gear Gauge J26487 Tool J38282 Tool J35545 Tool J35545 O OO JO Om P Go M 1 Install a flow meter with a pressure gauge 2 Ensure the engine is idling and fluid temperature is between 52 to 57 C 125 to 135 F 3 Note the fluid flow rate 22 Group 64 Power Steering Pumps Service Procedures AP CAUTION Possible equipment damage The substeps within this step must be performed in rapid succession Leaving the shut off valve closed for too long could result in excessive fluid temperatures and pump damage Fully close the shut off valve When pump relief pressure is reached verify the flow rate is zero Immediately open the shut off valve Verify the flow rate rapidly returns to the value previously noted for idle engine rpm 5 Allow the fluid to cool to 52 57 C 125 135 F 6 Set engine speed at governed rpm then note the fluid flow rate Possible equipment damage The substeps within this step must be performed in rapid succession Leaving the shut off valve closed for too long could result in
21. ng 19 Lock ring 8 Body 20 Control valve 9 Guide pin 21 Spring 10 Inner plate 22 Copper washer 11 Vane 23 Plug 12 Rotor Group 64 Power Steering Pumps Vickers Power Steering Pump Power Steering Pump Shaft Snap ring Bearing Lock ring Seal Needle bearing O ring Body 9 Guide pin 10 Inner plate 11 Vane 12 Rotor 13 Cam ring 14 Support ring OO NOU BOD 14 T6006636 15 O ring 16 Outer plate 17 O ring 18 Spring 19 Support ring 20 Cap 21 Lock ring 22 Control valve 23 Spring 24 Washer 25 Plug 26 Support ring 27 Support ring Group 64 Power Steering Pumps LuK Power Steering Pump Power Steering Pump Plug Spring Control valve Housing Wear plate Casing ring Rotor Vane Wear plate 10 Dowel pin 11 Flange 12 Retaining ring 13 Bearing 14 Shaft CON OU P Go h co W6001363 15 Retaining ring 16 Gear 17 Lock nut 18 Flange 19 Bushing 20 Shaft 21 Seal 22 Retaining ring 23 O ring 24 O ring 25 Backup ring 26 O ring 27 O ring Group 64 Power Steering Pumps Power Steering Pump Power Steering Pumps Model Number Designations XXXX XX XX XXX X X X X XX 10 j Design No Shaft lype Code 00 Straight Shaft 1 in Keyed 03 Straight Shaft 5 8 in Keyed 38 11 Tooth Spline Tapered Shaft 1 in 8 Keyed 77 lapered Shaft 1 in 5 Keyed NI de Il Pressure Port Position Pressure Port Type M M16X1 5 P 62 18 UNF 2B Inlet Port Type U 75 16 UN
22. nstall the seal using sleeve 9994150 2 and handle 9991801 1 Ensure the flat side of the seal faces outward 9991801 9994150 W6000016 3 Install the shaft and bearing in the pump body Press in the bearing using sleeve 9994113 1 9994113 W6000017 33 Group 64 Power Steering Pumps Service Procedures 4 Install the snap ring 1 W6000009 5 Install the O rings in the pump body Note Refer to ZF Power Steering Pump page 13 for correct O ring placement The inner O ring 14 and support ring 15 have a smaller diameter than the outer O ring 17 and support ring 19 6 Install the guide pins 2 if removed and inner plate 1 in the pump body Tap the plate into position using a brass drift W6000018 7 Place the cam ring 1 in the pump body with the recess facing the direction of normal pump rotation W6000019 34 Group 64 Power Steering Pumps W6000020 W6000021 Service Procedures 8 Place the rotor 1 in the pump body The smooth drilling in the internal splines must face the drive side Place the vanes 2 in the rotor with the rounded sides facing outward toward the cam ring 9 Place the outer plate on the cam ring with the guide pins in their respective holes 10 Place the springs on the outer plate and install the cap Press the cap down with clamp pliers and install the lock ring 11 Install the control valve washers and spring Install
23. nstall the snap ring 1 Make sure the snap ring seats fully in the groove 4 Install the two guide pins in the pump body 5 Install the inner plate in the pump body with the stamped number and the molded outlet facing toward the cam ring 6 Place the cam ring 1 in the body Ensure the channels in the cam ring align with the channels in the inner plate 41 Group 64 Power Steering Pumps Service Procedures 7 Install the rotor in the pump body with the chamber for the internal splines facing the drive side Place the vanes in the rotor with the rounded sides outward toward the cam ring W6000039 8 Install anew O ring 1 in the pump body W6000040 9 Install the outer plate 1 in the pump body with the stamped number and the machined surface toward the cam ring Ensure the guide pins are aligned in the holes 10 Install a new O ring 1 in the pump body W6000054 42 Service Procedures Group 64 Power Steering Pumps W6000042 11 Place the spring on the outer plate and install the cap Press down on the cap with pliers and install the lock ring 12 Install the key in the shaft if it was removed Heat the drive gear to approximately 100 C 212 F and install it on the shaft 13 Install the washer and retaining nut Torque the nut to 100 Nm 74 ft Ib 100 Nm 74 ft Ib 14 Install anew O ring on the pump body 43 Group 64 Power Steering Pumps Service Procedures LuK Disass
24. r and scoring Pay particular attention to the surfaces that ride against the rotor 7 Check the rotor cam ring and vanes for wear Ensure the vanes fit easily in the rotor lf replacement is necessary the rotor vanes and cam ring must be replaced as a unit 8 Check that the control valve does not bind in the body If binding is evident replace the control valve 39 Group 64 Power Steering Pumps W6000034 40 W6000035 Service Procedures 9 If the control valve is to be reused disassemble the valve using pliers clamped over the hole in the side of the valve 10 Clean and inspect the valve components If any of the valve parts are damaged replace the complete valve assembly If the valve is not damaged lubricate the parts with oil and reassemble the valve Note Ensure the same number of washers are used during valve assembly that were removed during disassembly The number of washers determines control valve operating pressure Assembly N CAUTION When the pump is overhauled always replace all O rings and support rings in the pump Failure to replace these parts could result in pump failure 4 Press a new seal in the pump body using drift 9992997 1 9992997 2 Place the shaft and bearing in the pump body Press the bearing in with sleeve 9996075 1 9996075 Group 64 Power Steering Pumps W6000029 W6000036 W6000037 W6000038 Service Procedures 3 I
25. ring Pumps O AA ao 1 i e A W6000029 W6000030 W6000031 38 Service Procedures 9 Remove the snap ring 1 from the front of the pump body 10 From inside the pump body tap out the shaft and bearing as an assembly 11 Remove the control valve plug Note Note the number of washers behind the control valve plug 12 Remove the spring and control valve assembly from the pump body 13 Pull out the seal using puller 9996173 1 and expander 9996178 2 9996173 99961 78 Group 64 Power Steering Pumps W6000032 W6000033 Service Procedures Cleaning and Inspection 4 Clean all pump parts thoroughly 2 Check the shaft for wear at the seal surface and at the wear surface for the bushing Inspect the splines and threads for damage Replace the shaft if necessary 3 Check the bearing on the shaft If damaged replace the bearing as follows a Remove the lock ring b Press the bearing off using sleeve 9994113 1 c Press a new bearing on the shaft using sleeve 9994113 d Install the lock ring 9994113 4 Replace the seal O rings and support rings on the shaft 5 Inspect the bushing in the pump body for wear If damaged replace the bushing as follows a Press the bushing out using drift 9991459 1 b Press a new bushing in flush to the edge where the inner plate fits using sleeve 9994113 9991459 9994113 6 Check the outer and inner plates for wea
26. s action will reduce the pressure in the connection line 5 causing the control valve to unseat move to the right and provide additional passage for oil to return to the suction line As pump pressure returns to normal the relief valve closes and the control valve returns to its normal position 11 Group 64 Power Steering Pumps Drive End Bearing Change Power Steering Pump AAA 1 Bearing 2 Seal 3 Seal 4 Bushing The previous common bearing design is now offered in two versions depending on the drive option The LuK hydraulic pump formerly sold as Vickers is now driven either by a gear or an eleven tooth splined shaft depending on the engine on which it is installed The splined axle drive is used on all except Volvo and CAT 3306 engines 12 W6001429 A splined axle drive does not generate excessive axial forces and therefore the drive end bearing and housing has been redesigned with a bushing in place of the ball bearing Pumps designed for axial and radial drive forces gear attached to pump are still designated the VT series pumps Pumps redesigned for radial drive forces only splined drive shaft are now designated the LF series pumps Group 64 Power Steering Pumps Power Steering Pump Power Steering Pumps Exploded View ZF Power Steering Pump 1 T6006637 1 Shaft 13 Cam ring 2 Snap ring 14 O ring 3 Bearing 15 Outer plate 4 Lock ring 16 O ring 5 Seal 17 Spring 6 Bushing 18 Cap 7 O ri
27. st the flange Verify proper orientation of the cam ring 8 Put the housing on the flange Install and torque the bolts to 45 5 Nm 33 3 7 ft Ib 45 5 Nm 33 3 7 ft lb 92 Group 64 Power Steering Pumps W6000794 Service Procedures 9 Install the control valve and its spring 10 Install anew O ring on the plug and install and tighten the plug 11 Install a new O ring or gasket on the pump flange 12 If the pump is gear driven place the wedge key in the shaft Heat the drive gear to approximately 100 C 212 F and install it on the shaft 13 Install the washer if used and the nut Torque the nut to 100 Nm 74 ft lb 100 Nm 74 ft lb 53 Group 64 Power Steering Pumps Service Procedures 94 6453 02 01 01 Power Steering Pump Installation See General Work Practices page 17 for important service information before beginning this procedure Before working on a vehicle set the parking brakes place the transmission in neutral and block the wheels Failure to do so can result in unexpected vehicle movement and can cause serious personal injury or death 1 If necessary transfer the fluid fittings from the pump removed or install new fittings on the pump to be installed Ensure the fittings are properly oriented 2 If pump shaft is splined ensure there is a circlip installed in the drive coupler and the drive coupler is placed on the engine timing gears Spline
28. t the risk of eye injury due to contact with engine debris or fluids Fill the fluid reservoir nearly full Do NOT steer 2 Start and run the engine for 10 seconds then shut it off Check the reservoir and refill if necessary Repeat this step at least three times 24 Group 64 Power Steering Pumps Service Procedures Equipment damage Do NOT allow the fluid level to drop significantly or run out of the reservoir This may introduce air into the system which could result in damage to the steering gear Start the engine and let it idle for two minutes then shut it off Check the reservoir and refill if necessary Do NOT steer 4 Start the engine Steer the vehicle from full left to full right several times Add fluid as necessary to maintain it at the full line on the dipstick 25 Group 64 Power Steering Pumps Service Procedures 6453 01 01 01 Power Steering Pump Removal See General Work Practices page 17 for important service information before beginning this procedure Before working on a vehicle set the parking brakes place the transmission in neutral and chock the wheels Failure to do so can result in unexpected vehicle movement and can cause serious personal injury or death N WARNING HOT ENGINE Keep yourself and your test equipment clear of all moving parts or hot engine parts and or fluids A hot engine and or fluids can cause burns or can permanently damage test equipment N CAUTIO
29. the control valve plug 12 Place the wedge key in the shaft if it was removed Heat the drive gear to approximately 100 C 212 F and install it on the shaft 13 Install the washer if used and install the nut Torque the nut to 100 Nm 74 ft lb 100 Nm 74 ft lb 14 Install a new O ring on the pump body 35 Group 64 Power Steering Pumps Service Procedures Vickers Disassembly 1 Clean the outside of the pump body Remove and discard the external O ring from the body AP CAUTION Possible component damage Use protective jaw caps on the vise Failure to do so can cause damage to the pump Clamp the drive gear in a vise with protective jaw caps Remove the drive gear nut 3 Clamp the pump in a vise f E Use puller 9995433 1 and 9995434 2 to remove the A drive gear a FE 1 z 9995433 d E 9995434 ABE EE A EES ch ECG wp 7 dh EA ES CL ve Y DE W6000007 4 Remove the lock ring cap and spring from the rear of the pump W6000024 36 Group 64 Power Steering Pumps Service Procedures 5 Remove the two guide pins W6000026 6 Remove the O ring 1 from inside the pump body W6000025 7 amp SIA Turn the pump over and tap it against a flat surface to EN remove the outer plate 1 cam ring rotor and vanes 2 and inner plate 3 W6000027 8 Remove the O ring 1 from inside the pump body W6000028 37 Group 64 Power Stee
30. ump 9 Using a brass drift tap out the shaft and bearing 10 Using a 16 mm 5 8 in brass drift tap the inner plate out from the drive side 11 Press out the needle bearing using drift 9991866 9991866 12 Tap out the seal using drift 9992337 1 or equivalent 9992337 13 Unscrew the plug for the control valve Pull out the spring washers and control valve Note Note the number of washer for reassembly Cleaning and Inspection 4 Clean all pump parts thoroughly 2 Check the shaft for wear at the seal surface and at the needle bearing surface Inspect the splines and threads for damage Replace the shaft if necessary Group 64 Power Steering Pumps Service Procedures 3 Check the bearing 1 on the shaft If damaged replace 2 the bearing as follows b Press the bearing off using sleeve 9994113 2 c Press a new bearing on the shaft using sleeve 9994113 d Install the lock ring 1 E a Remove the lock ring 9994113 W6000011 4 Check the outer and inner plates for wear and scoring Pay particular attention to the surfaces that ride against the rotor 5 Check the rotor cam ring and vanes for wear Ensure the vanes fit easily in the rotor Note If replacement is necessary the rotor vanes and cam ring must be replaced as a unit 6 Replace the seal O rings and support rings on the shaft 31 Group 64 Power Steering Pumps W6000012 W6000013 sr W6000014 32
31. us injury Volvo Trucks North America Inc Greensboro NC USA Order number PV776 TSP194907 2003 Volvo Trucks North America Inc Greensboro NC USA All rights reserved No part of this publication may be reproduced stored in retrieval system or transmitted in any forms by any means electronic mechanical photocopying recording or otherwise without the prior written permission of Volvo Trucks North America Inc USA14074 Contents A EE EE CPP PEE nn EE EE OP ease 3 Par cierro FUNDS iis ierdie ese Ge ee Ee ee an ee 3 o A EA OS OO EN N OE EA ETE 5 Pal Gale POUR WEED 5 TOOR EE 7 oe IE is die sg NE N EE EE KO OE EE 7 GE TOE sedasie vee ee od ie ie ee N A 7 BEE LEN GED sissies ede eie De n da oe de AT 8 Design and FUNGION sussies Ri ii ca 9 Power Steering PUMP una een 9 Bei iek ME Ed EE EA N EE EE ER EI 11 Pressure Relief Valve u une 11 Di End Beat na GANS ae 12 Power Steering Pumps Exploded View eie ees ee ee ee ee Ee ee ee ee 13 EF e lee FUMED ae 13 Vickers Power Steering PUMP 14 LUK Power gie PUMO asii anna 15 Power Steering Pumps Model Number Designations 16 SITIOS POCOS ainia 17 E rd EE 17 Hydraulic Pressure TEST rica 20 Power Steering Pump Flow Test iese es ee Ee ee EE ee ee ee EE ee ee 22 Power Steering Hydraulic System Bleeding 24 Power Steering Pump Removal 26 Power Steering Pump Overhaul iss SE NGK SEE SKA SS ERK DRAG Ee ed 28 OE EE EE N A 28 ES nda
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