4-19.2.2 Cleaning, Inspection, and Repair
Check all mating surfaces. Replace any parts that have scratches or burrs that may cause leakage. Clean all
metal parts in an approved cleaning solvent.
Blow dry parts with air; do not wipe dry with paper towel or cloth because lint or other matter could get into the
hydraulic system and cause damage.
Do not use a coarse grit or try to file or grind motor parts. Check around the keyway and chamfered areas of the
shaft for burrs, nicks, or sharp edges that can damage the seals when reassembling the retainer.
Lubricate all seals prior to installation with a light petroleum jelly. Use only new seals when reassembling the
Place the bearing housing (31) on a smooth, flat surface with the largest open end of the housing up. Aline the
small inside diameter end of a seal driver (Tool No. 600469) with the shaft face seal (30) and press the seal into
the seal seat of the bearing housing.
Install the shaft and bearing kit (29) in the bearing housing. Be careful not to damage the seal in the housing. It
may be necessary to use a press to install the shaft and bearing kit. Using a press, install the dust seal (28) in
the front retainer (25). Then, install the shaft seal (27) and seal (26) in the retainer. Apply a light petroleum jelly
to the inside diameter of the shaft seal and dust seal.
Place a protective sleeve over the shaft. To prevent damage to seals, install retainer (25) over shaft part of shaft
and bearing kit (29) with a twisting motion. Do not cut or distort shaft seal-such would cause external leakage.
Lightly oil the threads of six bolts (24) and install through retainer holes into the bearing housing. Tighten bolts,
first to 50 inch pounds in the following sequence: first12 o'clock, second--6 o'clock, third--10 o'clock, fourth--4
o'clock, fifth--8 o'clock, and sixth-2 o'clock; final torque to 300 inch pounds, repeating the sequence.
Position the motor in vise with output shaft down, clamping as described for disassembly. Pour a small amount
of light oil inside the output shaft.
Apply a light film of petroleum jelly on the seal (19) and install in bearing housing (31). Install drive (23) in output
shaft, longer splined end first. Apply petroleum jelly to two small seals (22) and install seals in geroler. Apply
petroleum jelly to the valve plate seal (19) and install in valve plate (18).
Assemble the valve (17), valve plate (18), valve drive (20), and geroler (21) as shown in Detail A of Figure 4-45A
to correctly time the motor. This is important to the correct rotation of the output shaft.