Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 - Manual (Page 26)

22
Differential Lockout
Cylindrical Design Lockout - Overhaul
Note: Find instructions for:
Cast Iron Cover Lockout - Overhaul on page 20
Original Design Lockout - Overhaul on page 21
Disassemble and Remove Lockout
Note: With axle installed in vehicle, place differential lock se-
lector valve in the disengaged (or unlocked) position.
Disconnect the air line at the lockout piston cover.
1. Remove capscrews and lock washers fastening
mounting bracket to power divider cover. Remove
bracket and piston housing.
2. Remove lock nut, piston with o-ring, compression
spring and shoulder washer from push rod.
Note: The shift fork and push rod cannot be removed with
power divider cover installed (see Remove Power Divider
on page 24).
Retrofit Cylindrical Design to Cast Iron
Cover Design Lockout
The cast iron cover design lockout assembly is interchange-
able with the cylindrical design lockout, only as a complete as-
sembly. The original shift fork and push rod can be used for
either type lockout and need not be replaced.
Retrofit kits are available to convert the non-current design
lockouts to the current cast iron cover design lockout. For ad-
ditional information, refer to Dana Parts Books AXIP-0085.
Retrofit as follows:
1. Disassemble and remove the cylindrical design lock-
out.
2. Assemble and install the cast iron cover lockout.
Mounting screws are not interchangeable between various
design style lockouts. They are a different length and size.
Assemble and Install Lockout-Cylindrical
Design
1. With shift fork and sliding clutch installed, place the
shoulder washer (white plastic) over push rod. The
large diameter side of the washer must face the pow-
er divider cover.
2. Install compression spring on push rod.
3. Lubricate o-ring with silicone-based lubricant and in-
stall o-ring on piston.
4. Place piston assembly on push rod. The large diame-
ter end of piston must face power divider cover.
5. Install lock nut on push rod and tighten to 13-17 lbs.
ft. (18-23 N•m).
6. Install piston housing, making sure the housing is
correctly seated and piloted in the shoulder washer.
7. Place mounting bracket over housing and position on
power divider cover. Install capscrews and lock
washers and tighten to 48-56 lbs. ft. (65-76 N•m)
Note: If axle is installed in vehicle, apply sealant to air line fit-
ting and connect air line. When tightening air line, hold
piston housing in mounting position using a wrench ap-
plied to the hexagon configuration at outer end of hous-
ing.
CAUTION
1 - Shoulder washer must seat properly
1