Drivetrain Troubleshooting Checklist

Drivetrain
Troubleshooting Checklist

Below are a
few Troubleshootings listed:

 

1.
Abnormal Wear/Debris Checks

Check magnetic
drain plug for particles and examine.
Check magnetic
screens.
Drain oil
through a fine cloth or sleve.
Drain oil
and flush if necessary to clear system.
Check operation
of system (e.g. Noise, vibration, oil pressure etc.)
Thief sample
drawn from bottom of the sump.
Not sampled
hot and midstream at drain (see sampling instructions.)
Check correct
oil level is being maintained.
Check correct
oil grade is being used.
Lack of/excessive
particles can result from cold sampling procedure as oil is
not well mixed.
Debris
could come from a previous failure or an accumulation of wear
particles.
Check shaft
alignment.
Check diff
lock operation.
Oil pump
not operating.
Extended
lubricant use.
Check for
misalignment of drive train.
Check tyre
diameters are the same size.


2.
Dirt and Water Checks
Check for
leaking oil seals.
Check for
damaged or missing breathers.
Loose cover
plates or linkage boots/seals damaged.
Oil storage
or top-up containers/funnels dirty.
Dirt entering
when unit filled or topped up with oil.
Pressure
cleaning procedure introducing water or dirt.
Condensation
due to low operating temp or blocked breather.
Oil cooler
leaks.
Check sampling
technique.
Recent
overhaul/rebuild.


3.
Overheating Checks
Sump overfull.
Heat transfer
(e.g. Binding brakes.)
Low oil
level.
Unit caked
with dirt.
Oil cooler
blocked or restricted.
Incorrect
oil grade.
Overload
conditions.
Shaft misalignment.
Localised
high temperature due to wear problem.
Diff lock
left engaged for extended periods.

Clean Oil
System Troubleshooting Checklists

1.
Abnormal wear/debris checks
Check oil
filter for particles and examine.
Drain oil
through a fine cloth or sleve.
Sample
taken from filter bowl (incorrect sampling method).
Drain oil
and flush if necessary to clear system.
Check operation
of system (e.g. Noise, vibration, oil pressure etc.)
Debris
could come from a previous failure or an accumulation of wear
particles through extended lubricant use.
Not sampled
hot and midstream at drain (see sampling instructions).
Lack of/excessive
particles can result from cold sampling procedure as oil is
not well mixed.
Check magnetic
screens.
Oil pump
not operating.
Thief sample
drawn from bottom of the sump (incorrect sampling).
Carry our
stall test and check for knocking at stall speed (transmission).


2.
Overheating Checks
Incorrect
oil grade.
Sump overfull.
Low oil
level.
Unit caked
with dirt.
Oil cooler
blocked or restricted.
Localised
high temperature due to wear problem.
Overload
conditions.


3.
Dirt and water checks.
Check sampling
technique.
Check for
leaking oil seals.
Loose cover
plates or linkage boots/seals damaged.
Dirt entering
when unit filled or topped up.
Recent
overhaul/rebuild.
Oil storage
or top-up containers/funnels dirty.
Oil cooler
leaks.
Pressure
cleaning procedure introducing water and dirt.
Condensation
due to low operating temperature or blocked breather.
Water traps
not functioning or breather blocked (compressor).
Check of
damaged or missing breathers.
Check oil
filter for by-pass operation.