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Page Title:
TABLE 6-2. TROUBLESHOOTING - continued |
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 TABLE 6-2. TROUBLESHOOTING (Cont'd)
STEP
PROCEDURE
CORRECTIVE ACTION
Electrical (Cont'd)
2. Neither forward or
c. Defective suppressor
c.
Check diode across ter-
reverse operation.(Cont'd) 3SP.
minals 4 and 5 of sup-
pressor 3SP using ohm-
meter. Replace sup
pressor 3SP If defective.
d. Defective accelera-
d. Check continuity through
tion switch
switch, using ohmmeter,
with accelerator pedal
depressed. Replace if
defective.
e. Open brake switch.
e. Check continuity through
switch using ohmmeter.
Replace switch if
defective.
f. Defective control
f. Check in accordance
pack ICP or 2CP
with manufacturers'
recommendations. Re-
place defective con-
trol packs.
g. Turn on silicon
g. Check using ohmmeter or
control rectifiers
test light. Replace
1SCR or 2SCR.
defective SCR.
h. Accelerator speed
h. Check resistance of
potentiometer.
potentiometer. Replace
if defective.
i. Defective travel
i. Check motor. Remove or
motor.
repair as required.
3.No forward motion.
a. F relay fails to
a. With truck drive wheels
pick-up.
off floor, make follow-
ing checks:
(1) Check F relay coil
for continuity.
Replace if relay
is defective.
(2) Directional switch.
Check for closed FWD
contacts. Adjust or
replace as required.
(3) Check for shorted
suppressor circuit
between terminals 6
and 4 of 3SP. Re-
place 3SP if de-
fective.
6-6
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