User's Manual

10 308-674
Service
Disconnecting the Displacement Pump
CAUTION
When servicing the left and center displacement
pumps (as viewed from the rear of the system), the
packings in both units must be replaced at the same
time, or uneven performance will result.
1. Flush the entire system.
NOTE: Any residual paint may clog the system.
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
2. Relieve the pressure.
3. Disconnect the filter hose and the inlet hose.
CAUTION
Be sure to support the displacement pump while it is
being disconnected, to prevent it from falling and
causing injury or property damage. Do this by se -
curely bracing the pump, or by having one person
hold it while another disconnects it.
4. Using an adjustable wrench, remove the three
bolts (1) and the tie rods (2). Slide the
pump (102) down as far as possible.
5. With two adjustable wrenches, use one to hold the
coupler (6) to prevent it from turning, and the other
to disconnect the displacement rod (105). Carefully
remove the pump from the hydraulic
motor (101).
6.
Unscrew the lower tie plate (3), and retaining nut
(4) from the displacement pump.
7. Refer to manual 308–650 for displacement pump
service.
Fig. 3
1
2
102
101
103
6
3
4
105
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