f11. TRANSMISSION UNUSUALLY NOISY WHEN OPERATING (CONT)
YES
Is scavenge pump free from
damage?
CAUTION
Read CAUTION
on following page.
YES
Notify DS Maintenance.
Notify DS Maintenance.
NO
NO
POSSIBLE PROBLEMS
Transmission oil level OK.
Oil not contaminated.
Operating temperature normal.
No codes logged in ECU.
KNOWN INFO
Faulty PTO engagement.
Faulty scavenge pump
engagement.
Faulty oil pump.
Faulty flexplate bolts.
Faulty flexplate.
Faulty propeller shafts and /
or universal joints.
Faulty transmission transfer
case,
Worn transmission gear teeth
and / or PTO gear teeth will
cause a noisy transmission.
REASON FOR QUESTION
Noise Check
TEST OPTIONS
Worn transmission gear teeth
and / or scavenge pump gear
will cause a noisy transmission.
REASON FOR QUESTION
Visual Inspection and
Scavenge Pump Suction
Test
TEST OPTIONS
KNOWN INFO
Transmission oil level OK.
Oil not contaminated.
Operating temperature normal.
No codes logged in ECU.
PTO engagement OK.
POSSIBLE PROBLEMS
Faulty scavenge pump
engagement.
Faulty oil pump.
Faulty flexplate bolts.
Faulty flexplate.
Faulty propeller shafts and /
or universal joints.
Faulty transmission transfer
case,
TM 9-2320-365-20-2
2-1422 Change 1
Does operating noise
increase when PTO is
engaged?
3.
2.
