SEAT SWITCH.

6-61.

SEAT SWITCH.

holding mounting bracket (3) to truck and remove

assembly.

Removal.

(5) Remove cover screws (13), cover (12)

(1) Remove valve cover (para. 6-30).

and gasket (14).

(2) Disconnect and tag leads at switch (60,

figure 7-2).

Installation. Reverse procedures in a. above.

(3) Remove switch attaching screws, nuts

and lockwashers securing switch to bracket and remove

6-65.

CONTROL VALVE LEVERS AND LINKAGE.

switch.

Removal.

(1) Remove valve cover plate (para. 6-30).

b. Installation. Reverse procedures in a. above,

(2) Remove retaining rings (4, figure 7-20)

adjusting switch position up or down as required so that

securing connecting rods (6) to hoist (2) and tilt levers

it is just actuated as the operator's seat is fully lowered.

(1).

Loosen bracket screws to position bracket with attached

(3) Pull out cotter pin (3) securing pin (5) in

switch for proper actuation and then tighten bracket

bracket (13) and pull out pin to release hoist and tilt

screws.

levers.

6-62.

TERMINAL RELAY.

(4) Remove two screws (14), nuts (15) and

lockwashers (16) securing bracket (13) to truck and

remove bracket.

6-63.

Each motor is protected by a thermal relay

(5) Remove cotter pins (l I) and clevis pins

which will open the motor circuit if overheating occurs.

(12) securing clevis (10) and connecting rods to control

When temperature sensed by the relay drops to a safe

valve. If valve actuation is proper, note position of

operating value, the relay will automatically close.

sleeves

and

connecting

rod

devises

before

a. Removal.

disassembling them from the connecting rods.

(1) Remove

nut, lockwasher and clamp

(6) Compress spring (22) turn disc (21) to

(figure 7-2) which fastens relay to motor and lift relay

release pin (23) and remove disc, spring and pin from

from motor.

bracket.

(2) Scrap sealing compound from relay

(7) Remove screws (25) securing spacer clips

terminals. Unsolder leads at terminals.

(24); remove spacer clips.

b. Installation. Reverse procedures in a. above,

(8) Remove screws (18), nuts (19) and

soldering leads to terminals with rosin flux and solder.

lockwashers (20) securing bracket (27) and switch

Avoid unnecessary heating of the relay while soldering.

actuator hinge (26); remove bracket and switch actuator

Coat terminals after soldering with silicone rubber

hinge.

sealing compound.

b. Installation. Reverse procedure in a. above,

Test.

adjusting position of sleeves (7) on connecting rods until

(1) Test electrical continuity of relay between

control valve actuation is proper, then secure with

terminals with an ohmmeter or test light. Test at room

setscrews (8).

temperature.

(2) If controlled temperature is available, test

6-66.

TILT CYLINDERS.

opening temperature of relay. It should open on rising

Removal.

temperature at 224 degrees F. plus or minus 4 degrees.

(1) Remove truck floor plate (para. 6-27).

6-64.

ACCELERATOR CONTROL CONTACT

(2) Tag and disconnect hoses (2, 3, 4, 5,

ASSEMBLY.

figure 7-13) from tilt cylinders. Cap hoses and plug

ports in cylinders (18, 19) to exclude dirt.

Removal.

(3) Support mast so it will not suddenly tilt on

(1) Remove floor plate from truck (para. 6-

removal of tilt cylinders.

27).

WARNING

(2) Disconnect Iinkage ball joint (I, figure 7-

If not supported the mast will fall forward when

11) and spring from operating lever (9).

the tilt cylinders are disconnected.

(4)

(3) Disconnect wiring harness at connector

Remove screws (22) attaching pins to

(6).

brackets on truck frame and on uprights.

(4)

Remove screws (4) and lockwashers (5)

6-22