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Page Title:
TRANSMISSION UNUSUALLY NOISY WHEN OPERATING (CONT) |
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 TM 9-2320-366-20-2
f11. TRANSMISSION UNUSUALLY NOISY WHEN OPERATING (CONT)
KNOWN INFO
TEST OPTIONS
2.
Noise Check
Transmission oil level OK.
REASON FOR QUESTION
Oil not contaminated.
Does operating noise
Operating temperature normal.
Worn transmission gear teeth
increase when PTO is
No codes logged in ECU.
and / or PTO gear teeth will
engaged?
POSSIBLE PROBLEMS
cause a noisy transmission.
Faulty PTO engagement.
Faulty scavenge pump
engagement.
NO
Faulty oil pump.
Faulty flexplate bolts.
Faulty flexplate.
Faulty propeller shafts and /
YES
Notify
Notify DS Maintenance.
or universal joints.
Faulty transmission transfer
case,
CAUTION
Read CAUTION
KNOWN INFO
TEST OPTIONS
on following page.
3.
Visual Inspection and
Transmission oil level OK.
Scavenge Pump Suction
Oil not contaminated.
Is scavenge pump free from
Test
Operating temperature normal.
damage?
REASON FOR QUESTION
No codes logged in ECU.
PTO engagement OK.
Worn transmission gear teeth
POSSIBLE PROBLEMS
and / or scavenge pump gear
will cause a noisy transmission.
Faulty scavenge pump
engagement.
Faulty oil pump.
Faulty flexplate bolts.
Faulty flexplate.
Faulty propeller shafts and /
or universal joints.
NO
Faulty transmission transfer
case,
YES
Notify DS Maintenance.
2-1646
Change 1
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