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60. FIRST AND SECOND SPEEDS ONLY; NO 2-3 SHIFT | Up
/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual | Next
64. UPSHlTS PROPERLY; WILL NOT DOWNSHIFT |
TM 9-2320-289-34
Table 2-1, Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
Corrective ACTION
Step 5.
Remove, disassemble, clean, and inspect transmission oil pump. (See paragraph
5-15)
Step 6.
Remove, disassemble, clean, and inspect forward clutch assembly. (See
paragraph 5-1 6)
Step 7.
Remove, clean, and inspect roller clutch assembly. (See paragraph 5-1 9)
62. NO REVERSE OR SLIPS IN REVERSE
Step 1.
Inspect transmission linkage for damage,
Replace any damaged components. (See paragraph 5-2)
Step 2.
Test transmission oil pressure with brakes applied, “ R“ (Reverse), engine at
1000 rpm. (See paragraph 5-11)
If oil pressure is normal, perform step 3.
If oil pressure is low, perform step 4.
NOTE
There is no approved way to check transmission oil filter for blockage or
restrictions.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Step 8.
Step 9.
Remove transmission oil filter and check for water in hydraulic fluid. (See
TM 9-2320-289-20) Inspect intake pipe and “ O“ ring for improper positioning and
damage.
Replace hydraulic fluid and transmission oil filter if any water is present.
Replace intake pipe and “O” ring if damaged. Replace transmission oil filter if
blockage or restrictions are suspected.
Remove, disassemble, clean, and inspect transmission oil pump, (See paragraph
5-1 5)
Remove, disassemble, clean, and inspect transmission control valve assembly.
(See paragraph 5-7)
Remove, disassemble, clean, and inspect rear servo assembly. (See paragraph
5-9)
Remove, disassemble, clean, and inspect direct clutch assembly. (See paragraph
5-17)
Remove and inspect rear band, (See paragraph 5-1 9)
Remove, clean, and inspect center support assembly and seals. (See paragraph
5-1 9)
2-38
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