Spicer Tandem Drive Axles Pro-40 Single Reduction and Single Reduction with Differential Lock User Manual

Page 13

Forward Assembly

Differential Carrier Assembly - Forward

Disassemble Carrier - Forward

Note: The removal of the forward carrier does not require dis-

connecting of the inter-axle driveline and removal of the
output shaft yoke assembly as most other Dana tan-
dems require.

Standard Differentials

1. Block the vehicle.

2. Drain axle lubricant.

3. Disconnect main driveline.

4. Disconnect differential lockout air line.

5. Disconnect lead wires to the selector switch and air

line at shift cylinder.

6. Remove axle shafts.

Diff-Lock Models
For removal of the locking wheel differential carrier assembly,
the differential lock must be engaged and held in the engaged
position. This can be accomplished by one of two methods;
either engage via air pressure or engage manually.

Engage via Air Pressure

a. Using an auxiliary air line, apply 80–120 PSI air

pressure to shift cylinder air port to engage clutch.

Engage Manually

a. Install a 0.250 – 18 NPTF bolt over 1.5" long in the

cylinder air port to manually engage the clutches.
GM models require a M12 X 1.5 X 38mm bolt.

Note: Hand-tighten the bolt, over-torquing may cause damage

to the shift unit. To facilitate hand-tightening, coat bolt
threads with axle lube.

Note: With either method, the axle shaft may have to be

rotated to permit the clutch to become engaged.

Do not lie under carrier after fasteners are removed. Use
transmission jack to support differential carrier assembly
prior to loosening fasteners.

7. To remove axle shaft, remove axle stud nuts. (If

used, remove lock washers and taper dowels.)

8. Remove axle shafts.

Note: All models in this publication use axle shafts with

unequal lengths. Axle shafts may also be location spe-
cific with various wheel equipment. Do not misplace axle
shafts from their intended location. Identify left and right
shafts for reference during reassembly.

TIP: If necessary, loosen dowels by holding a brass drift in the
center of the shaft head and striking drift a sharp blow with a
hammer.

Do not strike the shaft head with a steel hammer. Do not
use chisels or wedges to loosen shaft or dowels.

9. Remove carrier cap screws, nuts and lock washers.

10. Remove differential carrier assembly.

1—Connect 80-120 PSI air line to cylinder port

1—Hand tighten with socket
2—M12 x 1.5 x 38mm bolt – GM only 0.250 – 18 NPTF –

all models except GM

WARNING

CAUTION