8
This section describes the removal and installation of the
motor’s shaft seal.
1 Drain the oil from the motor.
2 Position the motor so the shaft seal is accessible.
3 Clean the area around the motor shaft and seal.
Important: Cleanliness is extremely important; be sure
that no contaminates get into the motor.
4 Using a retaining ring pliers remove the retaining ring.
5 Screw a 3 in. X 1/4-20 bolt into the threaded hole in
the stationary seal. Pull on the bolt to remove the seal.
6 Use the special pulling tool, Owatonna Tool Co. P/N
CAS 1844, to remove the rotating seal, see figure 1. If
the special tool is not available pull out the rotating seal
with a wire bent to the shape of the puller.
Note: Detailed drawings of all special tools are given in
the back of this manual.
7 Remove the o-ring; it will either be in the rotating seal
or on the shaft.
Note: Eaton recommends replacing the entire shaft
seal. Use Shaft Seal Kit P/N 990231.
Important: The metal-to-metal sealing surfaces are
critical. Clean the areas of contact with a suitable
solvent then blow them dry. The solvent must evaporate
without leaving a residue. Do not touch the sealing
surfaces after cleaning.
8 Apply petroleum jelly to the o-ring and install it in the
rotating seal
9 Apply a light coating of clean hydraulic oil to the
cleaned metal sealing surface of the rotating seal.
10 Install the rotating seal using the special pulling tool
(CAS 1844).
11 Screw a 3 in. X 1/4-20 bolt into the threaded hole in
the new stationary seal. The bolt provides a convenient
means for holding the seal.
12 Apply petroleum jelly to the o-ring that is around the
largest part of the stationary seal.
13 Apply a light coating of clean hydraulic oil to the
cleaned metal sealing surface of the stationary seal.
14 Install the stationary seal.
15 Using the retaining ring pliers install the retaining ring
with the beveled side out.
Figure 1
Bolt
Rotating Seal
O-ring
Stationary Seal
Pulling Tool
Minor Repair: Seal Shaft Inspection
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