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 TM 5-1940-277-20
TM 1940-20/2
Using two 13 mm box wrenches, with one person working Inside cab and one person working outside cab, remove
2.
four units (1), eight washers (2), four spacers (3), and four bolts (4) securing drive unit to cab (5).
Remove drive unit (6) from cab (5) by pulling straight out from sealing grommet (7) fitted into drive access hole (8)
3.
in cab (5).
4.
Remove grommet (7) from hole (8) in cab (5).
INSTALL:
1.
Place new shaft sealing grommet (7) into drive access hole (8) with its flange towards back of wiper drive unit (6).
2.
Place a thin coat of sealant, Item 22, App. C, to inside of grommet (7) to assist in shaft installation.
Place wiper drive unit (6) into position, ensuring that drive shaft fully enters sealing grommet (7) without disturbing
3.
its position in drive access hole.
4.
Install four washers (2) on four bolts (4) and insert bolts thru wiper drive unit (6), spacers (3) and cab (5).
On inside of cab install four washers (2) and four nuts (1). Tighten using two 13 mm wrenches, taking the following
5.
precautions:
a.
Casing is not twisted or bent during bolting down.
b.
Sealing grommet is even on drive shaft and pressed firmly into drive access hole to make a watertight joint.
Install windshield wiper motor (refer to paragraph 3-12).
6.
NOTE
Do not run wiper on dry windows for more than one or two strokes or wiper blades or
Plexiglas windshield may be damaged. Wet down windshield if further testing is needed.
3-22
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