Contactor Panel - TM-10-3930-631-340141

TM 10-3930-631-34

(2) Remove bottom plate (5) and insulator (6).

(4) Install items (24 and 32 through 39) or.

Remove nut (7) and tube (9) from stud (8).

shaft. When segments (33, 35 and 36) are in- stalled,

(3) Remove bushing (29), washer (30), and

make certain that center punch marks on underside of

spacer (31) from shaft (26).

segments are alined with center punch mark on gear

(4) Remove blocks (21) and (22) with attached

wheel. Bent edges of contacts must point down when

contact assemblies (20) from studs. Remove nuts (12)

installed.

and washers (13) and remove bus bars (14) and nuts

(5) Install contact assemblies (20) on blocks (21

(16), washers (15, 17, 18), and screws (19) and contact

and 22) and secure with screws (19), nuts (12 and 16)

assemblies (20) from blocks (21 and 22).

and washers (13, 15, 17 and 18). Install blocks on studs

(5) Remove remaining parts from shaft (26).

(41). Install bus bar (14) on blocks against inner nuts.

Note position of center punch marks on segments (35

(6) Install spacer (31), washer (30) and bushing

and 36) and wheel (40) for identification and direction.

(29) on shaft. Install tube (9) and nut (7) on stud (8).

Check position of pin (25) in bushing (27) and on wheel.

(7) Position insulator (6) and lower plate (5) on

Mark and locate the above for proper assembly.

studs. Aline shaft assembly in upper frame and lower

(6) Drive pin (25) from bushing (27) and

plate. Secure plates with nuts (2), lock washers (3) and

shaft (26). Remove bushing.

washers (4). Tighten nuts securely.

(7) Remove springs (10) and roller arms (11)

(8) Install washer (28), lock washer (3) and

from upper frame (42). Remove shaft (26) and studs

screw (23) in shaft. Tighten screw securely.

(41).

(9) Rotate shaft and observe operation of

d. Cleaning, Inspection and Repair.

contact segments and contact assembly. Contact points

should meet and disengage smoothly and securely.

(10)Install cover (1) on switch.

WARNING

f. Installation.

(1) Position spacers (15 and 16, fig. 9-16) and

Cleaning compound, solvent (P-D-680) used

for

lever stop (17) on switch. Install forward and reverse

cleaning is potentially dangerous to personnel and

switch beneath instrument panel and secure switch with

property. Do not use near an open flame. Flash point of

screws (14). Tighten screws securely.

solvent is 100 F to 138 F (38 C to 590 C).

(2) Connect wires to forward and reverse switch

(1) Clean all metal parts in cleaning com-

terminals. Check to be certain all connections are tight.

pound, solvent (P-D-680) and dry thoroughly.

(3) Install cover (23) on instrument panel and

(2) Check screws and studs for worn threads

secure with screws (18) and nuts (19).

and other damage.

(4) Refer to TM10-3930-631-12 and install

(3) Check bushings for wear and scoring.

hourmeter on instrument panel.

(4) Inspect springs for wear and lack of tension.

(5) Operate truck and check switch operation.

(5) Inspect contact assemblies and contact

Truck should move in forward or reverse direction

segments for wear and damage to contact surfaces.

smoothly. No movement should occur with switch in N

Dress surfaces with crocus cloth if possible.

(neutral) position.

(6) Inspect control lever, knob and tube for wear

9-24. Contactor Panel

and damage.

a. General.

Many of the removal and repair

(7) Replace damaged and unserviceable

parts.

procedures listed below can be performed with the

e. Assembly.

contactor panel installed in the truck. For clarity the

(1) Install roller arms (11, fig. 9-17) and springs

following are performed with the contactor panel

(10) on pins on under side of upper frame.

removed.

b. Removal. Refer to paragraph 2-16 and remove

(2) Position bushing (27) on shaft (26) and

secure bushing with pin (25). Install shaft in upper frame

contactor panel from truck.

(42).

c. Disassembly.

(3) Install gear wheel (40) on shaft. Wheel pin

(1) Tag and identify the location of all leads and

must be in same position as when removed. Center

cables before they are disconnected from terminals in

punch mark on underside of wheel must be located on

the panel. Refer t(o figures 2-7, 9-1 and 9-18 to identify

center line of pin hole in shaft and wheel pin must be

harness, leads and cable connections in the panel.

positioned between the two stops. Make certain wheel is

Disconnect and remove wiring harness and cables

positioned between two rollers on roller arms.

9-27