3-64. TRACTION MOTOR ASSEMBLY (cont)
Drycleaning solvent P-D-680 is toxic and flammable. Wear protective goggles and gloves and use
only in a well-ventilated area. Avoid contact with skin, eyes, and clothes and don't breathe vapors.
Do not use near open flame or excessive heat. The flash point is 100-138°F (38-59°C). If you
become dizzy, get fresh air and get medical aid, immediately. If contact with eyes is made, wash
your eyes and get medical aid immediately.
c. Use a wiping rag dipped in drycleaning solvent and thoroughly clean the rabbet fits of motor and gear case of dirt,
oil, grease, and foreign matter. Be sure motor and gear case mounting faces are smooth and free from high
d. Check that the armature, fan, hypoid pinion, and pinion-end bearing inner race are installed in their proper places.
e. Slowly guide motor into gear case. Take care that the hypoid pinion meshes properly with the hypoid gear.
f. Install 12 lockwashers (6) and capscrews (5) through fan openings of gearcase. Tighten capscrews evenly. Use a
0.0015-inch (0.0381 mm) feeler gage around edge of motor frame and check that the mounting faces of motor
and gearcase are in full contact.
g. Use a pinion mounting distance gauge and check hypoid pinion (13) for proper location with respect to
intermediate shaft center line. Each pinion has the plus or minus variation from nominal mounting distance
etched on the end. The hypoid pinion location must be checked and possibly readjusted to proper distance if the
following parts have been changed:
(1) The hypoid gears have been changed.
(2) A new armature has been installed, either with new or old hypoid gears.
(3) A new motor frame has been installed.
(4) A new commutator-end bearing has been installed.