Wacker Neuson 28Z3, Service Manual

Page: 141 / 264

SHB 28Z3 EN – Edition 2.0 * 28z3s510.fm
5-9
Hydraulic system
☞
Fit the shaft, grooved ball bearing, rotary shaft lip seal and circlip into the housing in this
order
➥
Use a new rotary shaft lip seal and apply a thin layer of lubricant to the surface of the
sealing lips before assembly
☞
Fit with auxiliary tool Fig. 16 while tapping lightly with a rubber hammer
➥
For easier installation place the housing on the counterpart
☞
Secure the shaft with the circlip
☞
Assemble the stop studs and spring seats (2 x) and then insert them into the pump
housing
➥
Ensure that the stop studs and spring seats are correctly positioned
➥
The stop studs have various lengths and must be fitted in the original position,
otherwise the tilting angle is changed.
➥
Insufficient output and engine droop would result
☞
Insert the piston into the housing
➥
Ensure the correct installation position
☞
Place the balls into the corresponding holes in the cradle
➥
Use grease if the balls do not remain in position in the cradle
☞
Insert the cradle with the two balls into the pump housing
Fig. 14: Fitting the shaft
Fig. 15: Fitting the rotary shaft lip seal
Fig. 16: Auxiliary tool
Fig. 17: Inserting the piston
Fig. 18: Inserting the piston