SM04-019-0
Page 4
DISASSEMBLY.
3. Inspect the gear end faces, outside diameter, and
teeth for roughness and score marks.
NOTE
4. Check all internal threads for damage.
Discard all O-rings and seals upon re-
5. Inspect the wall of the gear bore diameters for ex-
moval.
cessive wear or score marks.
1. Clean the unit thoroughly with solvent, kerosene, or
ASSEMBLY.
other non-corrosive cleaning fluid.
NOTE
2. Scribe a line across the pump sections to act as a
guide during assembly.
Use only new seals and O-rings during
assembly. Thoroughly coat all seals
3. Remove the four capscrews securing the cover
and O-rings with clean hydraulic oil
plate, gear plate, and flange together.
prior to installation.
4. Separate the sections by lightly tapping them with a
1. If removed, install the parts that make up the pres-
soft metal hammer.
sure relief valve assembly into the cover plate.
5. Remove the O-rings and backup ring from the
2. If removed, install the parts that make up the flow
cover plate and the flange.
control valve assembly into the cover plate.
6. Remove the O-rings and pressure plate from the
3.
Install the seals and backup ring into the flange.
cover plate and the flange.
4. Install the dowels into the gear plate and the cover
7. Remove the dowels from the gear plate and the
plate.
cover plate.
5. Install the O-rings and pressure plate into the cover
8. Remove the seals and backup ring from the flange.
plate and the flange.
9. If necessary, remove the parts that make up the flow
6. Install the O-rings and backup ring into the cover
control valve assembly from the cover plate.
plate and the flange.
10. If necessary, remove the parts that make up the
7. Assemble the cover plate, gear plate, and flange to-
gether using the scribe marks made during DISASSEM-
pressure relief valve assembly from the cover plate.
BLY and install the four capscrews securing the cover
INSPECTION.
plate, gear plate, and flange together.
1. Inspect the shafts for roughness in the bearing and
8. Add a generous amount of clean hydraulic oil into
both ports to ensure the pump is adequately lubricated.
sealing areas.
Rotate the drive shaft to distribute the oil and check for
2. Inspect the splines for damage or excessive wear.
freedom of shaft rotation.
