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© 2022 Eaton Cummins Automated Transmission Technologies. All rights reserved.
2022.10.7
Oil Leak Inspection Process | Appendix TRSM0940
Oil Leak Inspection Process
Inspect for Oil Leak
Determine if it is a Weep or a Leak.
Weep: Stained, damp, no drips, light oil film
or dirt adhered to the contaminated area.
Leak: Extremely wet or dripping of oil
in the contaminated area.
Gasket/Rear Seal
Leak
1. Clean suspected oil weep
area with a clean, dry cloth
or mild soluble degreaser.
2. Ensure lube is filled to the
prope
r lube level.
3. Notify the customer that it
is only a weep and it is not
considered to be detrimental
to the life of the transmission.
4. Repair is complete.
1. Determine the origin of the leak path.
2. If the origin of leak is obvious, skip to Step 3.
3. If the origin of the oil leak is not obvious, then
use either of the two following steps to determine
the oil leak:
Note: Do not use a high-pressure spray wa
sher to
clean the area. Use of a high-pressure spray may
force contamination into the area of concern and
temporarily disrupt the leak path.
i. Clean area with a clean, dry cloth or mild
soluble degreaser and fill the transmission to
the proper lube level.
OR
ii. Clean the area as noted above and insert t
racer
dye into the transmission lube and fill
transmission to proper lube level.
Operate vehicle to normal transmission operating
temperature and inspect the area for oil leak(s)
visually or if tracer dye was introduced use an UVL
(Ultraviolet Light) to detect the tracer dye’s point
of o
rigin.
Note: When inspecting for the origin of the leak(s)
make sure the assumed leak area is not being
contaminated by a source either forward or above
the identified area such as the engine, shift tower,
shift bar housing, top mounted oil cooler, etc....
Once the origin of the leak is identified, repair the
oil leak using prope
r repair procedures from the
designated model service manual.
After the repair is completed, verify the leak is
repaired and operate the vehicle to normal
transmission operating temperature. Inspect
repaired area to ensure oil leak has been eliminated.
If the leak(s) still occurs, repeat steps or contact
the Road
ranger Call Center at 1-800-826-4357.
Step 1
Step 2
Step 3
Step 4
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