Spicer Differential Lock Conversion - Manual (Page 4)

CONVERTING CONTROLLED TRACTION DRIVE AXLES TO SPICER DIFF-LOCK AXLES
To change a vehicle that is equipped with a Controlled Traction Tandem Drive Axle over to a Wheel Diff Lock model, the following items or conditions
are required:
• In-Cab Misc. Shift Controls Components and Body Wiring Harness- OEM supplied and outlined below
* 2 Extended Spline Axle Shafts (1-Forward Axle, 1-Rear Axle)
* Diff Lock Exchange Carrier Assemblies – SEE NOTE BELOW
• Shift Unit Switch Wiring Pigtail – offered by SPICER through OEM
•• NOTE: Because of the extensive list of parts and their cost, cost of labor and warranty issues, Eaton Corporation recommends that customers
order Spicer Exchange Carrier Assemblies. (See page 2 for proper exchange unit).
Shown in Figure 1 is the Plumbing schematic of the Spicer Tandem Drive Axles, DD & RD461 axles w/Wheel Diff-Lock. Reference this
schematic when retrofitting your vehicle. Spicer also recommends the following procedures and/or parts be used when retrofitting your vehicle from
Control Traction Axles to Diff Lock Axles:
• The use of a Pilot Control Valve to disengage the Diff-Lock in high range.
* The use of Cab Mounted Diff-Lock Control Valves, automatic reset type only.
“ The use of Dash Indicator Light(s), mounted next to the proper valve(s)- SEE WARNINGS BELOW!
* The Wiring Harness MUST be installed per OEM wiring instructions I diagrams.
* A Warning Label mounted in the cab, close to the Diff-Lock control valve where the driver can easily read it (Included in conversion kit
* Use Modified Shift Unit Part Number 73503 (Part Number is stamped on mounting flange) on the FORWARD Tandem Axle location.
* Use Modified Shift Unit Part Number 73507 (Part Number is stamped on mounting flange) on the REAR Tandem Axle location.
WARNING! Installation procedures for Spicer Diff Lock other than those covered in this
bulletin are NOT approved by Spicer.
WARNING! FAILURE TO INSTALL THE INDICATOR LIGHT(S) MAY RESULT IN SERIOUS INJURY AND EQUIPMENT DAMAGE BY
OPERATING THE VEHICLE WITH DIFF LOCK ENGAGED ABOVE 20 MPH OR UNDER UNSUITABLE CONDITIONS*
SEE SPICER PUBLICATION AXDR-D130 WHEEL DIFF LOCK DRIVER INSTRUCTIONS.
Spicer Components
Spicer Components