Drive Motor Assembly

TM 55-4920-425-13&P

3-16. Drive Motor Assembly (Fig 3-7).

a. To remove the motor assembly (64), proceed as in paragraphs 3-lla and b and 3-12a. Loosen and remove the

three motor wires from terminal strip (114) on the cradle rear plate.

b. With a 3/16 hex keywrench remove four cap screws (65) and four washers (66) holding the motor assembly to the

cradle base.

c. Lift the assembly out of cradle.

3-17. Vibrator Motor (Fig 3-7).

a. Remove six cap screws (40) from front cover (39) and remove cover.

b. Remove four cap screws (72) holding motor to frame. Carefully lift motor (71) out of unit.

3-18. Electrical Connectors (Fig 3-7).

a. All lower connectors are mounted on the rear cover (60). Refer to paragraph 3-11 for removal of these

connectors.

b. All upper connectors (28, 30, 32, 34) are secured to the table (25) with standard screws (29, 31, 33, 35). Remove

all soldered wire leads using a soldering iron and match/mark tag all leads for proper identification and installation during

reassembly.

3-19. Drive Assembly (Fig 3-7).

a. Perform steps in paragraph 3-11 and steps b and c in paragraph 3-14.

b. Remove one screw (89); and four screws and washers (98, 99); and washers (100) that attach slip ring assembly

(97) to finger mounting posts (88, 90). Remove posts (88, 90).

c. Remove collar (95) by loosing setscrew (96) and remove slip ring assembly (97).

d. Remove bushing sleeve (101) by loosing setscrew (102).

e. Remove three screws (104) holding lower bushing housing (103) to bottom plate and remove bushing housing

(103). Remove bearing (107).

f. Remove pulley (108) from shaft (111) by loosing set-screw (109). Remove 0-ring (110).

3-20. Clutch Assembly (Fig 3-7).

a. Loosen screw (75) and nuts (76) and free arm (77). Remove arm (77) from clutch assembly (84) by removing

screw (78).

b. Remove bearing (79). Remove pulley (80) by loosing setscrew (81).

c. Remove pulley (82) by loosing setscrew (83).

d. Remove clutch assembly (84) from base by removing four screws (85), washers (86), and washers (87).

3-21. Reassembly. Refer to figures 3-7, 3-8, and 3-9 for identification and location of items

3-22. Clutch Assembly (Fig 3-7).

a. Position clutch assembly (84) on base (127) and secure with four screws (85), washers (86) and washers (87).

b. Place pulley (82) on clutch assembly shaft and secure with setscrew (83).

c. Place pulley (80) on clutch assembly shaft and secure with setscrew (81).

d. Press bearing (79) on to shaft; then place arm (77) on shaft and secure on shaft with screw 78.

e. Replace screw (75) and nuts (76). Refer to paragraph 3-15 for drive belt and clutch arm adjustment.

3-23. Drive Assembly (Fig 3-7).

a. Secure bushing housing (103) to bottom plate with three screws (104).

b. Place pulley (108) on shaft (111) and tighten setscrew (109). Replace bearing (107) and 0-ring (110) on shaft and

place shaft into housing (103).

c. Replace bushing sleeve (101) and tighten setscrew (102). Place slip ring assembly (97) on shaft (111). Replace

collar (95) and tighten setscrew (96).

d. Attach slip ring assembly to finger mounting posts (88, 90) with screws (98), washers (99), and washers (100).

e. Mount finger mounting post to top panel with screws (89, 99).

3-24. Drive Motor Assembly (Figure 3-7).

a. Place motor on bottom plate and secure with four screws (65) and eight washers (66).

b. Connect the three wire leads to the terminal strip (114) on the cradle rear plate.

c. Adjust the tension on the clutch belt as in paragraph 3-15f.

3-12