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Table 5-2. Direct Support Troubleshooting-continued -706880685
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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 -706880687
TM 5-4210-233-14&P-1
Table 5-2. Direct Support Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TRANSMISSION - Continued
1
TRANSMISSION OVERHEATS IN ALL RANGES - Continued
Step 2. Broken parts in converter (can cause excessive fuel consumption). Replace or overhaul
converter assembly.
Step 3. Aerated oil. Adjust oil to proper level; check for defective seal ring at suction tube; check
for defective pump.
Step 4. Cooler flow loss due to internal leakage. Overhaul transmission.
2
NOISE OCCURRING INTERMITTENTLY (BUZZING)
Step 1. Oil leve l is low. Add oil to proper level. Be sure dipstick calibration is correct.
Step 2. Seal ring on oil pickup tube is damaged or missing. Replace pickup tube seal ring
and filter.
Step 3. Filter is clogged. Replace filter.
Step 4. Aerated oil. Check for improper oil level.
Step 5. Hole in filter. Replace filter.
3
TRANSMISSION WILL NOT SHIFT INTO GEAR, SLIPS OUT OF GEAR,
OR OPERATES ERRATICALLY
Step 1. Check for low main pressure. Remove line from main pressure port on transmission and
install tee and 0 to 300 psi (O to 2070 kPa) gauge. Start engine and allow to run at idle
speed. With parking brake applied, shift transmission into D (Drive). Check for 90 psi
(621 kPa) main system pressure.
Step 2. Check for clogged internal filter element. Remove oil pan (see para 6-53).
If internal filter element is clogged, replace internal filter element (see para 6-54).
Step 3. Check for damaged or missing preformed packing on internal filter pickup tube.
If preformed packing is damaged or missing, replace preformed packing and gasket
(see para 6-54).
If preformed packing is not damaged or missing, disassemble transmission and inspect oil
pump, main pressure regulator valve, control valve body for leakage or sticking valves
(see para 6-50, 6-51 and 6-62).
5-16

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