Safety precautions Safety precautions............................................................................................................................................................................4
VSPP version overview VSPP versions.....................................................................................................................................................................................5
Exploded view, VSPP.......................................................................................................................................................................5
Parts list, VSPP....................................................................................................................................................................................5
Seal kit for VSPP.................................................................................................................................................................................7
Required tools....................................................................................................................................................................................7
VSPP holding tool....................................................................................................................................................................... 7
Assembly tool for dust seal......................................................................................................................................................8
Assembly tool for shaft sea, O-ring / RotoGlyd type...................................................................................................... 8
Additional tools needed...........................................................................................................................................................9
VSPP disassembly Remove shock and relief valves from housing....................................................................................................................11
Remove priority valve parts and P-check from housing..................................................................................................12
Priority valve parts and P-check details............................................................................................................................13
Remove end cover, gear set, cardan shaft, distributor plate, O-rings and valves from gear set end of
housing......................................................................................................................................................................................15
Remove spool/sleeve set from housing................................................................................................................................ 17
Disassemble spool/sleeve set and remove dust seal and shaft from housing........................................................18
VSPP maintenance Cleaning............................................................................................................................................................................................ 19
Inspection and replacement......................................................................................................................................................19
VSPP assembly Assemble spool/sleeve set......................................................................................................................................................... 20
Assemble shaft seal and spool/sleeve set to housing......................................................................................................23
Assemble valve parts, O-rings, distributor plate, cardan shaft, gear set, and end cover to gear set
end of housing........................................................................................................................................................................ 26
Assemble priority valve parts and P-check to housing....................................................................................................28
Assemble shock and relief valves, and dust seal, to housing.........................................................................................29
Assembly details for shock and relief valves, and dust seal......................................................................................30
Testing of VSPP Set-up for testing........................................................................................................................................................................... 32
Shock valves.....................................................................................................................................................................................33
Steering tests...................................................................................................................................................................................33
Start up test......................................................................................................................................................................................33
Pilot relief valve test......................................................................................................................................................................33
Neutral positioning test...............................................................................................................................................................34
Check for external leakage......................................................................................................................................................... 34
Tightening torques for connections
Tightening torques for connections....................................................................................................................................... 35
Service Manual
VSPP Steering unit
Contents
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