or other continuity testing
device, check continuity between
connector pins E-D, E-F
and D-F, and between G-H, H-J and G-J. Continuity should be indicated. Also check to be sure that no continuity exists
between each pin and the motor frame (stator). If continuity requirements are not met, replace the motor.
Disassemble the motor only to the extent necessary to effect repairs. Proceed as follows:
a. Remove four screws from the 3-3/4-inch bolt diameter
of the end plate
(11, figure 5-13), and remove the end
Keep load spring, shims and washers in their proper relationships at disassembly if they will be need-
ed at assembly.
b. Withdraw the rotor (9) from the stator (1), and put aside until needed for assembly.
an arbor press
or equivalent. press the bearings (8) out
of the end plate and the stator. being careful
d. Remove four screws from the corners
of the junction box (3, figure 5-13) and lift box away from stator.
e. Tag wires for identification, and unsolder from connector.
f. Remove four screws from corners of connector, and remove connector from junction box (3).
Dry cleaning solvent (Fed. Spec PD-680) used to clean parts is potentially dangerous to personnel and
property. Do not use near open flame or excessive heat. Flash point of solvent is 100F to 138F (38C
Bearings are permanently lubricated and sealed at the time of manufacture. Do not attempt to clean
or relubricate them. Keep bearings in plastic bags or wrap securely in grease-proof paper until need-
ed for assembly.
Blow loose dirt from cavities and windings. Wipe external surfaces with a cloth moistened with dry cleaning solvent (Fed
Assemble the motor as directed in the following procedure (See figure 5-13).
a. Pull wires through connector hole
in junction box (3),
them to their respective connector pins. (See
wiring diagram, figure FO-1, for proper connections.)
b. Install receptacle (4, figure 5-13) injunction box (3), and secure with four screws.
c. Position junction box (3) on motor frame (stator); and secure with four screws through corners.
d. Install a bearing (8), shim (7) and washer (6), in that order, on the shorter shaft of the rotor (9). Insert the rotor
into the stator (1). and guide the bearing into the bearing recess in the stator.
e. Place a bearing (8), shim (7) and load spring (10) in that order. over the longer shaft of the rotor (9). Carefully
fit end-plate (11) over the assembly, guiding the bearing into the bearing recess.