NHTSA ID Number: 10237337
Manufacturer Communication Number: KC-2263-Ver5
TSB/Document Date: 2023-06-05
Summary
CBR: Timing Gear Plate Repair. This solution provides supplementary information to be used when installing a Timing Gear Plate with Integrated Seal.
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TSB/Document ID: KC-2263-Ver5
Replacement Service Bulletin Number:
MFR Communication Date: 2023-05-16
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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5/30/23, 1:31 PM
Article
Mack
Chassis - Timing Gear Plate Repair
Information
This solution provides supplementary information to be used when installing a Timing Gear Plate with
Integrated Seal.
Repair Criteria
For inspection procedures and repair criteria, refer to TSB M-212-003 Timing Gear Plate, Inspection in
Impact.
Tools
• For Turbo Compound: A new Turbo Component Support Tool has been developed. This tool is
designed to support the TC unit in place while performing TGP Repair.
Tool Part Number 88800826.
For additional information, see Tool Bulletin STB22-005M and the Trucks Academy Video.
• A list of other tools required can be found on the Job Aid included at the end of this solution.
Parts
• PART KITS have been developed to include all necessary parts for a complete repair. New Seal
Conditioner will be included in all kits (instructions for seal condition application below):
VGT Engines: Spare Parts Kit 24459407
Turbo Compound Engines: Spare Parts Kit 24459389
https://volvo-trkna-prod1.pegacloud.net/prweb/PRAuth/app/VolvoKM_/iNPUIKpeinqPJi2G0hH930k43USdE1gb*/!PS1__TABTHREAD4?pyActivity=%40baseclass.pzProcessURLInWindow&pyPreActivity… 1/7
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Article
Repair
The timing gear plate replacement procedure in Impact should be utilized for this repair in addition
to the supplementary installation steps for application of the seal conditioner below.
The Impact procedure is Operation 2152-03-03-05 Timing Gear Plate, Replacement
- Transmission and Clutch Removed.
IMPORTANT: Loosening of the rocker shaft and overhead adjustment IS NOT
REQUIRED when following the Impact instructions. There are new steps included in the
Impact procedure for setting gear backlash.
Seal Conditioner Application
1. Clean engine block TGP seal mating surface of any oil, grease, dirt. Inspect and clean the TGP bolt
holes in rear of the engine block.
2. Apply a LIGHT FILM of the seal conditioner (included in the part kit) with a gloved finger to the TGP
mating seal surface of the block.
Avoid getting conditioner in bolt holes.
Remove any excess seal conditioner from bolt holes.
IMPORTANT: To keep conditioner from contaminating the T-joints, conditioner should not be
applied beyond the corresponding dowel or bolt holes in the block. The correct application pattern
is shown below:
5/30/23, 1:31 PM
Article
2a. IMPORTANT: For a turbo compound engine, grease should be applied to the surface of the TC
unit.
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Article
3. Install the TGP on the engine block per the Impact procedure. Remove any excess seal
conditioner from T-joints.
4. Refer to the Impact operation for installation of timing gears and set-up procedures.
5. Prior to the installation of the flywheel housing (FWH) onto the TGP, clean the FWH mating surface
of any oil, grease, dirt. Inspect and clean the TGP bolt holes in the FWH.
6. Complete the installation of the flywheel housing onto the engine following the procedure in Impact.
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Article
7. After the flywheel housing has been reinstalled, wipe away any conditioner that has squeezed from
the joints.
Video
A video of the procedure can be found below. Click the YouTube button in the lower right-hand
corner of the video to view the video full-size.
Job Aid
A Job Aid outlining repair times, document information, and a tool list can be found below (click on
the pictures to expand to a larger size)
5/30/23, 1:31 PM
Article
Mack TGP Job Aid V3.pdf
Warranty Information
Warranty Information can be found in the Warranty Operations Manual, 6.2.1.1 - TIMING GEAR PLATE Clean Claim Template.
Log in to TDP prior to clicking the link.
Additional Information
• Use of recommended oils is advised. The Recommended Oil List can be found in Impact or by
clicking here.
5/30/23, 1:31 PM
Tags
Article
tgp
timing gear plate
oil leak
unlocking uptime
Categories
Make and Model > Mack > CXU/CHU/PI - Pinnacle
Make and Model > Mack > LR
Make and Model > Mack > MRU/TE - TerraPro
Powerplant > Mack > MP7
Powerplant > Mack > MP8
Vehicle System > Engine
Make and Model > Mack > AN - Anthem
Make and Model > Mack > GU/GR - Granite
Related links and attachments
Mack TGP Job Aid V3
Feedback
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