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Table 5-2. Direct Support Troubleshooting-continued -706880686
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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Table 5-2. Direct Support Troubleshooting-continued -706880688
TM 5-4210-233-14&P-1
Table 5-2. Direct Support Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TRANSMISSION - Continued
3
TRANSMISSION WILL NOT SHIFT INTO GEAR, SLIPS OUT OF GEAR,
OR OPERATES ERRATICALLY - Continued
Step 4. Remove oil pan (see para 6-53). Manually shift transmission and see if manual shaft and
detent lever engage selector valve and that actuator pin is attached to detent lever.
If selector valve does not engage detent lever, repair or replace defective parts
(see para 6-62).
If selector valve engages detent lever, disassemble transmission and valve body to check
for worn clutch packs in transmission, loose valve body screws, and sticking valves invalve
body (see para 6-52, 6-57, 6-59, 6-60 and 6-61).
4
OIL LEAKING AT CONVERTER HOUSING
Step 1. Remove cover from top of converter housing. Check for signs of oil.
If engine oil is inside housing, replace rear engine crankshaft oil seal (see para 6-31).
If transmission oil is inside housing, inspect inner converter housing mounting screws,
converter pump to converter housing seal ring, converter housing gasket, torque converter
cover seal ring, oil pump seal, pilot attachment screws, pump hub seal rings and converter
pump hub (see para 6-51).
5
EXCESSIVE CREEP IN FIRST AND REVERSE
Step 1. Check for too high engine idle speed.
If idle speed is more than 750 rpm, adjust engine idle speed.
If there is any lockup pressure, inspect lockup clutch valve for sticking pistons (para 6-64).
6
AUTOMATIC SHIFTS OCCUR AT TOO HIGH A SPEED
Step 1. Governor valve malfunctioning (stuck). Clean or replace governor screen and/or governor.
Step 2. Vacuum modulator vacuum hose to engine kinked o leaking - light throttle shifting delayed.
r
Step 3. Modulation delayed (vacuum). Replace vacuum modulator. Be sure that O-ring is installed.
Step 4. Mechanical actuator cable is kinked, broken, or not properly adjusted. Replace, adjust,
or repair cable. Full modulator travel must correspond with full throttle.
Step 5. Mechanical actuator malfunctioning. Replace actuator.
Step 6. Shift signal valve adjustment is too high. Adjust shift speeds.
5-17

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