Replacing The Hydraulic Pump - Wittke STARLIGHT Maintenance Manual

84 Hydraulic System
3. Lock out and tag out the vehicle (see Locking Out and Tagging Out the Vehicle on page 21).
Caution!
If the unit has to be driven away for repairs on the hydraulic system, remove the drive shaft
between the engine and the pump before restarting the engine.

Replacing the Hydraulic Pump

Occasionally, circumstances such as a broken pump drive shaft, a leaking or noisy pump or a lack of
hydraulic pressure or oil flow may necessitate the replacement of the pump.
Before proceeding with the replacement of the pump, determine the type of pump setup that is used
on your W
ITTKE
(pump connected to PTO via a drive shaft) and direct mount PTO. Basically, each setup calls for the
same replacement method but with some differences due to the position of the pump.
A. To replace a front-mounted hydraulic pump, perform the following procedure:
1. Disengage the pump and turn OFF the engine.
2. Make sure the parking brake is applied and the vehicle is tagged out for maintenance purposes
(refer to "Locking Out and Tagging Out the Vehicle" on page 21).
3.
Close the shut-off valve (see Figure 7-14).
4.
Remove the pump guard.
Figure 7-4 Pump guard
5. Disconnect the electric coil on the dump valve (if equipped).
™ unit. There are 3 types of pump setups: front-mounted, PTO-driven mounted