This Service Manual contains comprehensive and practical information supported by detailed diagrams and schematics for Dana Axle 37R116 (p/n BM120, BM121, BM151, BM170).
The manual covers safety precautions, technical specifications, design features, step-by-step disassembly and assembly procedures, adjustment settings, inspection data, and service notes. It also includes recommendations required for correct maintenance, troubleshooting, and reliable operation of the axle.
All service procedures should be performed only after carefully reading this electronic manual. Special attention must be paid to the safety section in order to prevent breakdowns, equipment damage, injuries, and operational malfunctions.
Contents:
- Technical Description
- Forward and Caution
- Pad Mount Axle Without Brake - Exploded View
- Pad Mount Axle Without Brake - Parts Description
- Trunnion Mount Axle Without Brake - Exploded View
- Trunnion Mount Axle Without Brake - Parts Description
- Pad Mount Hydraloc Differential - Exploded View
- Pad Mount Hydraloc Differential - Parts Description
- Trunnion Mount Hydraloc Differential - Exploded View
- Trunnion Mount Hydraloc Differential - Parts Description
- Planetary Exploded View and Parts Description
- Pad Mount Axle Without Brake - Cross Section
- Trunnion Mount Axle With Brake - Cross Section
- Hydraloc Differential - Cross Section
- Trunnion Mounting - Cross Section
- Hydraloc Differential Test Instructions
- Face Seal Installation Procedure
- Recommended Lubricants
- Recommended Oils
- Recommended Gear Lubricants
- Bearing Heating and Freezing Guidelines
- Gear Tooth Contact Chart – LH
- Gear Tooth Contact Chart – RH
- Cleaning and Inspection
- Fastener Torque Chart
- Plug Torque Chart
- DISASSEMBLY
- Trumpet Arm Removal
- Trumpet Arm, Brake and Planetary Disassembly
- Hydraloc Differential Disassembly
- Drive Flange V-Ring and Wear Sleeve Removal
- Pinion Seal Retainer Cartridge and Seal Removal
- Differential Retainer and Adjuster Removal
- Differential Assembly Removal
- Ring Gear Removal
- Differential Body Disassembly
- Piston Removal
- Pinion Removal
- Trunnion Mount Removal and Disassembly
Delivery (Instant Download)
Delivered in PDF format, the guide allows you to search for information easily and print complete sections or individual pages as needed. For the best experience, it’s recommended to use Adobe PDF Reader to ensure that all diagrams and graphics are displayed correctly. The manual is available as an instant digital download in PDF format immediately after purchase. No physical shipping is required - you’ll receive access to the files right away, ready to view or print on any device.
All documents are verified for readability and accuracy. You can save the manual to your computer, tablet, or smartphone and use it offline anytime, ensuring you always have critical repair and maintenance information at hand.




