ASSEMBLE
1. Make sure all components are clean. If bearings
are worn, install new bearings in end cap.
2. Make sure field coils and pole pieces are installed
correctly in housing.
3. Install brush holder assembly in commutator end
cap.
4. Carefully install armature in housing. Install retain-
ing rings.
5. Carefully install commutator end cover to housing.
Install and tighten capscrews.
6. Install brushes and spring assemblies. Replace
brush cover, if used. See Figure 17.
7. Install brake assembly to drive motor. See
Brakes 1800YRM1005.
8. Install drive motor to MDU. Secure in place using
motor mount studs.
Lift Pump Motor
The MPB040-E, MPW045-E, and MPW050-E lift
pumps cannot be disassembled. The motors are serv-
iced as an assembly.
REPAIR (MSW020/025-E AND
MSW025/030-F)
The lift pump motor is an electric motor mounted on
top of the lift pump and hydraulic tank. The motor
drives the lift pump supplying oil pressure to the hy-
draulic system. When repairing the lift pump motor
ALWAYS check that the battery is charged and check
all electrical connections BEFORE removing the mo-
tor from the truck:
1. Check the specific gravity of the battery or the op-
tional battery discharge indicator for proper bat-
tery charge. See Electrical System Checks for in-
formation on how to check the specific gravity.
2. Block the drive wheels to prevent movement.
3. Disconnect battery.
The lift pump motor used on the MSW020/025-E and
MSW025/030-F is a 24-VDC motor and has only two
serviceable items (see Figure 18):
• Brushes
• Brush Plate
Traction Motor 2200 YRM 1007
28
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