Yale MPB040E Manual page 53

2200 YRM 1007
Remove brush cover, if used. Measure the brush in
the brush holder, use a tire tread depth gauge or
small scale to measure from the top of the brush
holder to the back of the brush.
Brush replacement is REQUIRED when the height of
the brush measures 5.5 mm (0.22 in.) below the
brush box. If the brush is worn 4 mm (0.16 in.) below
the brush box, then brush replacement is RECOM-
MENDED.
See the section
0620YRM0294 for replacement of the brushes.
If other components of the motor are damaged, then
the entire motor must be replaced. The lift pump mo-
tor for the MPB040-E is a 24-VDC motor where the
MPW045/050-E offers both a 12-VDC and 24-VDC
motor. These motors are not serviceable and must be
replaced when not functioning properly. Repair or re-
place the lift pump motor and install. See Walkie Hy-
draulic Systems 1900YRM1018 or Walkie High Lift
Hydraulic System 2000YRM1044.
DC Motor Maintenance
A. MINIMUM DIMENSION
1. TAPERED END
(SPRING)
Figure 18. Pump Motor Brushes Inspection
Lift Pump Motor
2. WEAR END
3. BRUSH SPRING
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