TM-9-2320-273-34
TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
DECEMBER 1980
TM-9-2320-273-34 - Page 41 of 801
TM 9-2320-273-34
Table 2-11. Power Takeoff Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
PTO NOISY.
Step 1.
Check gear backlash of adapter and PTO.
a.
See paras 21-12 thru 21-15 and determine that proper number of gaskets
have been installed.
b.
If gaskets are not correct, make necessary replacement. If gaskets are correct,
go to step 2.
Step 2.
Check for worn and pitted gears.
a.
Remove PTO (para 21-2 and 21-3); then disassemble (para 21-4 thru 21-6).
b.
If gears are defective, replace. If gears are in good condition, go to step 3.
Step 3.
Check for worn or defective bearings.
Inspect bearings. Replace if defective.
2.
PTO JUMPS OUT OF GEAR.
Step 1.
Check to determine that shift linkage is not rigged too short.
a.
Adjust linkage (para 21-8).
b.
If problem is not corrected, go to step 2.
Step 2.
Check for broken shifter ball spring.
a.
Remove shift linkage and cover (para 21-2 and 21-3) and inspect spring.
b.
If spring is broken, replace.
If spring is in good condition, go to step 3.
Step 3.
Check for worn poppet pin.
Replace worn pin.
If pin is in good condition, go to step 4.
Step 4.
Inspect for worn gear teeth.
a.
Remove PTO (para 21-2 and 21-3); then disassemble (Para 21-4 thru 21-6).
b.
Replace defective gears.
2-25
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