K30139423

Solution K30139423
Monday, April 27, 2020 7:25:25 PM CEST
** SOLUTION **
Title
Automated Manual Transmission (AMT) Oil Filter Cap Leak After Service
Mack Models
Mack Model
MRU - TerraPro , TE - TerraPro , AN - Anthem , CHU - Pinnacle, Axle back , CXU Pinnacle, Axle front , GR - Granite , GU - Granite , PI - Pinnacle , TD - Titan
Volvo Models
Volvo Model
VN , VNL , VNM , VNR , VNX , VAH , VHD , VT
Emission Standard
Emission Standard
US04 , US07 , US10 , US10+OBD13 , US14+OBD13 , US14+OBD15 , US14+OBD
16 , US17 , US17+OBD16 , US17+OBD18 , US17+OBD19
Engine family
Engine family
11L Engine , 13L Engine , 16L Engine , MP7 , MP8 , MP10
Transmission
Transmission
AMT-F With Crawler Gears , AMT-F Without Crawler Gears , AMT-C , AMT-D , A
MT-F , AMT-C , AMT-D , AMT-F With Crawler Gears , AMT-F Without Crawler
Gears
** SOLUTION **
Cause
The AMT gearbox oil filter housing has been found to develop debris buildup or
corrosion under the filter cover flange on the lead in chamfer to the o-ring sealing
surface.
Failure to inspect and properly clean this area during an oil and filter change can lead to
a sealing ring failure during installation of the cap that may not be found during the oil
change. The subsequent oil leak can lead to catastrophic gearbox failure due to loss of
oil if not detected and corrected.
Solution
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Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
Transmission Oil Filter and Housing
Function Group
Function Group
222 oil filter , 431 gearbox, manual
Customer effect
Main customer effect
noise , fluid , road behaviour , efficiency/abnormal behavior , loss of drive
Noise
grinding , whine
Fluid problem
leak
Fluid implicated
Transmission Oil
Visual appearance
leaking
Conditions
Other conditions
after a workshop procedure on the vehicle
Administration
Author
ut9268h
Last modified by
RU4469V
Creation date
01-02-2017 21:02
Date of last update
13-04-2020 16:04
Review date
03-07-2017 00:07
Status
Published
NA_Reviewer
ut9268h
UNCONTROLLED COPY. Printed document is for temporary use only and should not be retained.
AMT oil filter housing corrosion
The AMT gearbox oil filter housing has been found to develop debris buildup or corrosion on the filter
cover flange.
Failure to inspect and properly clean this area during a filter change can lead to a sealing ring failure
during installation of the cap that may not be found during the oil change. The subsequent oil leak can
lead to catastrophic gearbox failure due to loss of oil if not detected and corrected.
If you detect corrosion on the location shown above do not attempt to clean or reuse this housing. The
corrosion is harder than the aluminum. This housing must be replaced.
Inspection and cleaning of the sealing surface for the cap o-ring is important to avoid this damage.
When cleaning is required DO NOT use power tools or grinders to clean the sealing area as this can
damage the housing beyond repair. Gently scrape by hand or use abrasive paper to clean the area. If
the area cannot be reliably cleaned or there is damage to the sealing surface for the o-ring, the housing
must be replaced.
Filter housings that show normal dirt build up (left image) can be cleaned with a Scotchbrite pad or
equal. Some residual staining of the aluminum housing (right image) may still be present after cleaning.
Clean the threads and sealing surfaces before reassembly. Apply a small amount of silicone grease that
meets the specification below on the o-ring, filter housing sealing area and the cap flange below the oring prior to assembly to help seal out moisture and dirt. There must be enough grease present to allow
squeeze-out under the flange so the dirt and moisture is sealed out of the area of concern. Clean the
filter cap of any excess grease squeeze-out after assembly to prevent giving false impression of a leak.
Silicone grease
Base
Consistency
Thickener
Temperature range
Silicone
NLGI 2
Lithium soap
-70°C to +160°C
Approved cleaning pad red or green Scotchbrite pad or equal.