Spicer Differential Lock Conversion - Manual (Page 2)

CONVERTING SINGLE SPEED DRIVE AXLES TO EATON DlFF-LOCK AXLES
To change a vehicle that is equipped with a Single Speed Tandem Drive Axle over to a Wheel Diff Lock model, the following items or conditions
are required:
• Working Air System, 1211 PSI required
• In-Cab Misc. Shift Control Components and Body Wiring Harness OEM supplied and outlined below
• 1 Extended Spline Axle Shalt for EACH Affected Axle (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, Spicer 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, DO & RD461 axles w/Wheel Diff Lock.
Reference this schematic when retrofitting your vehicle. Spicer recommends the following procedures and/or parts be used when retrofitting
your vehicle:
• 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 instructions I diagrams.
• Warning label mounted in the cab close to the Diff-lock control valve where the driver can easily read it (Included in Conversion Kit).
SPICER PARTS LISTING
Spicer