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55. SQUEAL AT LOW SPEEDS, ESPECIALLY WHEN HOT | Up
/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual | Next
58. LONG 1-2 SHIFT WITH END BUMP, 1-2 SLIPPAGE, OR EARLY 1-2 SHIFT |
TM 9-2320-289-34
Table 2-1, Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 6.
Disconnect vacuum hose from vacuum pump. Install hose and vacuum gage on
vacuum pump. Start engine. Calculate proper vacuum gage reading as shown in
chart. Shut off engine.
If vacuum drops 1 in. Hg or more in less than 1,5 seconds, or if vacuum never
reaches
proper
gage
reading,
replace
vacuum
Dump.
(See
TM 9-2320~289-20)
- -
Step 7.
57. ROUGH 1-2
Step 1.
Step 2.
Step 3.
Remove, clean, and inspect vacuum modulator assembly and modulator valve,
(See paragraph 5-3)
SHIFT OR 2-3 SHIFf
Test transmission oil pressure with brakes applied, “ D“ (Drive), engine at
1000 rpm. (See paragraph 5-11)
If oil pressure is normal, perform step 2.
If oil pressure is high, perform step 3.
Check for loose or damaged detent solenoid,
Tighten detent solenoid if loose and replace if damaged. (See paragraph 5-7)
If detent solenoid is not loose or damaged, clean transmission control valve
assembly. (See paragraph 5-7)
Check for loose or damaged vacuum lines and hoses.
Connect vacuum hoses or vacuum lines if loose and replace if damaged, (See
TM 9-2320-289-20)
2-34
Change 2
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