Spicer Single Drive Axles Service Manual: 34DS, 34RS, 38DS, 38RS, DS340, RS340, DS380, RS380, DS400, RS400, DS3 - Manual (Page 20)

General Information
17
Repair and Replacement
To achieve maximum value from an axle rebuild. Replace lower-cost parts, such as thrust washers, seals, etc. These items
protect the axle from premature wear or loss of lubricants. Replacing these parts will not increase rebuild cost significantly.
It is also important to replace other parts which display signs of heavy wear even though not cracked or broken. A significant
portion of such a parts useful life has been expended and the damage caused, should the part fail, is far in excess of its cost.
Steel Parts- Gear sets, input and output shafts, differential parts and bearings are not repairable. Worn or damaged parts should
be discarded without hesitation. Also discard mating parts in some cases. Gear sets, for example, must be replaced in sets.
Miscellaneous Parts - Seals and washers are routinely replaced. None of these parts can be reused if damaged. Fasteners using
self-locking nylon patches may be reused if not damaged, but should be secured by a few drops of Loctite #277 on the threaded
surface of the hole during installation and carefully torqued during installation.
Axle Housings - Repairs are limited to removal of nicks or burrs on machined surfaces and the replacement of loose or broken
studs.
Any damage which affects the alignment or structural integrity of the housing requires housing replacement. Repair by weld-
ing or straightening should not be attempted. This process can affect the housing heat treatment and cause it to fail complete-
ly when under load.
Silicone Rubber Gasket Compound - For more effective sealing. Spicer uses silicone rubber gasket compound to seal the
majority of metal-to-metal mating surfaces.
Spicer includes gasket compound and application instructions in many repair parts kits.
It is recommended that this compound be used in place of conventional gaskets. The compound will provide a more effective seal
against lube and is easier to remove from mating surfaces when replacing parts.
Seals, Yoke & Slinger Service Information
During the 4th Quarter of 1990, new seals and yoke & slingers were used on the models in this publication. The new seals and
slingers are noticeably different from the current seals and will affect interchangeability.
The upgraded seals can be used on axles originally equipped with the old seals.
Dana recommends the replacement of old yoke & slinger assemblies when the new seals are installed.
The old yokes and slingers will work with the new seals, but new yoke and slinger assemblies provide maximum sealing protection
and prevent premature seal wear due to poor yoke condition.
New yoke and slinger assemblies cannot be used with the old seal design on the tandem forward axles.
New yoke and slinger assemblies can be used with the old seal on the tandem rear pinions.
Yoke Assembly & Oil Seal Kits contain oil seal, yoke & slinger and instructions.
Most non-Dana aftermarket seals will not be compatible with the new Dana Yoke and Slinger assemblies.
Spcier recommends the use of special installation tools conveniently packaged in one single kit (listed below).
Refer to Dana parts Book AXIP-0089 and Eaton Bulletin 90-06 for additional information.
Seal Driver Installation Kit 272139
126917 Driver (Rear Axle Pinion)
127787 Adapter (use with 126917 Driver for Forward Axle Input)
127786 Driver (Forward Axle Output)
IMPORTANT
CAUTION