Yale MPB040-E, Manual

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3. Make alignment marks on commutator end frame
and field frame. Remove four long screws that
hold commutator end frame to drive end frame.
Pry commutator end frame from field frame. The
bearing will stay with the armature. Make sure the
special spring stays in the end frame.
4. Make alignment marks on drive end frame and on
field frame. Use a soft hammer to tap drive end
frame from field frame. The bearing will stay with
the armature.
5. Pull armature assembly from field frame. The
force of the permanent magnets in the frame
makes it difficult to remove the armature. Use a
pry bar to help move armature assembly.
6. Make alignment marks on brush holder plate and
on commutator end frame. Remove two screws
that hold brush plate to commutator end frame.
Remove brush holder assembly.
ASSEMBLE
Traction Motor and Hydraulic Pump Motor
1. Make sure all components are clean. If bearings
were worn, install new bearings in end frames.
See Figure 8 or Figure 9.
2. If cooling fan was removed, install it on armature.
Make sure field coils and pole pieces are installed
correctly in field frame.
3. Install brush holder assembly in commutator end
frame. Make sure alignment marks are aligned.
4. Install drive end frame on armature.
5. Carefully install armature and drive end frame in
field frame. Make sure index marks are aligned.
Install and tighten screws.
6. Carefully install commutator end frame on arma-
ture and fasten it to field frame. Install and tighten
hex head screws.
7. Install brushes and spring assemblies. See Brush
Replacement and Brush Alignment, Traction and
Hydraulic Motors in this section.
8. On hydraulic motor assemblies, install key and
coupler hub to index mark on armature shaft.
Tighten setscrew. Install other key and align
pump with coupler and alignment marks. Install
two capscrews that fasten pump to pump motor.
See Figure 11, Figure 12, or Figure 13.
Motors Repair 0620 YRM 0294
20