5-8 SHB 28Z3 EN – Edition 2.0 * 28z3s510.fm
Hydraulic system
☞ Remove the guide of the spring and the control disc from the housing
☞ Pull the mounting plate with the piston shoes and cylinders out of the cylinder housing
☞ Remove the centring mechanism and pins one after another
☞ Remove the circlip, thrust washers and spring from the cylinder housing
Assembling the hydraulic pump
Before assembly thoroughly clean the parts with clean oil to prevent dirt and water from
accumulating in the parts and to provide lubrication during assembly.
Apply a thin layer of grease to the O-ring surface to secure it in the grooves provided.
☞ Assemble the pump in the reverse order of dismantling
☞ Insert the thrust washers and spring into the cylinder housing and secure in place in the
housing with the circlip
☞ Insert the pins into the cylinder housing on the opposite side, see Fig. 12 and place the
centring mechanism on it
☞ Insert the mounting plate with the piston shoes and cylinders into the cylinder housing
Fig. 10: Removing the control disc
Fig. 11: Dismantling the drive unit
Fig. 12: Dismantling the drive unit
Fig. 13: Assembling the drive unit
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