Table Seal

TM 55-4920-425-13&P

Legend for Figure 3-5.

MFR.

SYMBOL PART NUMBER

DESCRIPTION

MANUFACTURER

CODE

TB1

10-140

STRIP, TERMINAL

CINCH MFG. CO

71785

TB2

2-140

STRIP, TERMINAL

CINCH MFG. CO

71785

TB3

4-140

STRIP, TERMINAL

CINCH MFG. CO.

71785

TB4

6-140

STRIP, TERMINAL

CONCH MFG. CO.

71785

TB5

P/O MODEL 939

STRIP, TERMINAL

BODINE ELECTRIC CO.

07829

223665-1

CABLE ASSY.,POWER INPUT

30120

223666-1

CABLE ASSY., BASE TO CRADLE

30120

1898

CABLE, 3 COND. NO 18AWG.

ALPHA WIRE CORP.

92194

XDS1

30099-0

LAMP HOLDER

SYLVANIA

28107

3-12. Gimbal Assembly. (Fig 3-7).

a. Pull the knob (118) on the right cradle support to release the cradle and move it to its 90 degree position.

Release the knob making sure the locking pin is engaged in its indent at this position.

b. Turn the table until the index is on the 180 degrees line. With a 3/16 hex key wrench, remove two cap screws

(16) (under the table) and one gimbal support plate (15) with the gimbal ring assembly.

3-13. Table Seal (Fig 3-7).

a. If it becomes necessary to lubricate or replace O-ring seal (27) under table, turn table until the index is on the 120

degree line.

b. Remove three flat head machine screws (26) near the center of the table using a 1/8 hex key wrench. Lift and tilt

the table just enough to obtain access to the O-ring seal, being very careful not to stretch or damage the wires to the

connectors on the table rim. Lubricate with grease (Item 3, Table 1-1) and replace table on the shaft at the 120 degree

index. Install three screws (26) and tighten uniformly.

3-14. Manifold Seal. (Fig 3-7).

a. To lubricate or replace manifold seal (110), perform paragraph 3-11 above.

b. With a 3/16 hex key wrench remove six cap screws (93) from the cradle top plate (92), three on each end.

c. Very carefully lift the entire plate with its assembled parts straight up until the lower end of the shaft (111) is

disengaged from manifold bearing (107). Slip the drive belt (113) off the shaft pulley during the above procedure.

d. Inspect and lubricate (refer to Table 1-1, item 3) or replace and lubricate the O-ring seal (110) on the lower end of

the shaft.

e. Reinstall shaft and top plate assembly in exact reverse order as disassembly above. Be sure drive belt is in its

proper place on the shaft drive pulley during reassembly. Tighten top plate screws (93) uniformly.

3-15. Drive Belts (Fig 3-7).

a. If it is necessary to change drive belts, motor to clutch (113), or clutch to shaft (112), follow instructions in

paragraph 3-11 entirely and 3-14b and c.

b. Remove cap screw (78) in the top of the clutch shaft (84) with a 3/16 hex key wrench and remove clutch bearing

arm (77), by loosening the two 1/4-28 nuts (76) at the frame end of the arm with a 7/16 open end wrench. With a 3/16

hex key wrench, back out cap screw (75) from the end of the clutch arm until the arm is free.

c. With a 1/8 hex key wrench, loosen four cap screws (85) at the clutch base and with a 3/16 hex key wrench loosen

the four cap screws (65) holding the motor to the base. The belts may now be removed and replaced.

d. In reassembly first install top plate assembly as instructed in paragraph 3-14c.

e. Tension clutch to shaft belt, Figure 3-6, by moving clutch away from shaft and tighten the four cap screws (85) at

the base of the clutch. Reassemble the clutch bearing arm, the reverse of 3-15 b. Hold the clutch arm with a 1/2 open

end wrench while tightening. Pressure at the center of the belt span should deflect the belt approximately 1/16 inch when

the belt is properly tensioned.

f. Tension motor to clutch belt by moving the motor away from the clutch and tighten the four screws (65) holding the

motor to the cradle. Pressure at the center of the belt span should deflect the belt approximately 1/16 inch when belt is

properly tensioned.

3-11