Spicer Tandem Drive Axles Service Manual D170, D190, and D590 Series - Manual (Page 27)

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Carrier Assembly
Carrier Disassembly - Forward Carrier Assembly
For models having the wheel differential lock option, refer to
the following procedure. These parts must be removed first
before further disassembly of the wheel differential can take
place.
1. For ease of service, mount differential carrier in head
stand with the differential lock facing up.
2. Remove the threaded cylinder cap.
3. Remove the piston push rod from the shift fork.
4. Remove the shift fork and sliding clutch assembly.
Note: Do not disassemble the shift fork from the sliding
clutch unless parts are to be replaced. To disassemble,
use a pin punch to remove spring pin from the fork leg.
The sliding clutch can now be removed from the fork.
5. Remove the shift fork spring.
Note: Omit this step if the ring gear is to be replaced. If the
ring gear is to be reused, check the tooth contact pattern
and ring gear backlash before disassembling the carrier
assembly. When checking the backlash, a yoke or helical
gear must be installed and torqued to the proper specifi-
cation to get an accurate reading. Best results are
obtained when tooth contact patterns are maintained in
used gearing.
Carrier Assembly