Motor Rewind Data

TM 5-4320-274-14&P

damage, or deterioration.

c. Use an inside growler and test the stator assembly for shorted coils as instructed in TM 5-764 (Electric Motor and

Generator Repair). Place the rotor assembly on an external growler and test for open circuits (see TM 5-764).

d. Replace all damaged or defective parts.

6-10. Motor Rewind Data

The following motor rewind data is furnished in the event it is necessary to rewind the stator.

a. Stator:

(1) Number of poles ..............2

(2) Number of coils ...............36

(3) Number of lots ..................36

(4) Turns per coil....................13 turns of (2) No. 19 AWG conductors in parallel

(5) Coil span ...........................1-14

(6) Wire size ..........................No. 19 AWG

(7) Type of wire ......................Type T, heavy Polythermalex coated round copper magnet wire per MIL-W-

583A

Winding connection ..........1 circuit WYE

b. Insulation materials:

(1) Slot cell .............................5-5-5 DMD-100 (36 pcs.)

(2) Slot phase separator ..........3-3-3 DMD-100 (36 pcs.)

(3) Slot wedge .........................5-5-5 DMD-100 (36 pcs.)

(4) Phase group separator .......0.007 Polyester glass sheet (12 pcs.)

(5) Dipping compound ............Type AN, grade CB, clear baking varnish, per MIL- V-1137A P. D. George No.

2106, class F.

c. Dipping and baking procedure:

(1) Preheat to 225° . (107° .).

(2) Dip in baking varnish until bubbling ceases.

(3) Bake at 240° . (116° .) for four hours.

(4) Redip in baking varnish until bubbling ceases.

(5) Bake at 240° . (116° .) for eight hours.

(6) Spray with air dry varnish and air dry.

6-11. Motor Reassembly

a. Install rotor assembly (26, figure 6-2) on shaft (25). Install bearing (27), internal fan (24), bearing retainer (23),

bearing (22), shaft sleeve (21), and key (20) on shaft.

b. Slide assembled rotor shaft through end shield (19) and install bolts (17) and washers (18). Install opposite end

of rotor shaft through stator and install spring washer (16). Install end shield (15), bolts (14), and nuts (13).

c. Position fan (12) on rotor shaft and install set- screw (11). Install fan guard (19) on motor housing and fasten

with screw (9).

d. Position conduit box gasket (8) and conduit box (7) on the motor housing and install the retaining screws (6).

Install cable gland (5) and gland screw (4) on the conduit box. Install gasket (3), conduit box cover (2), and screws (1).

6-12. Motor Installation

a. Refer to figure 4-4 and position the motor on the frame. Install the four screws, washers, and nuts.

b. Connect the electrical power cable per instructions contained in figure 4-1.

c. Install the centrifugal pump (para 6-5).

6-5