Komatsu 830E-AC Shop Manual page 653

Inspection Of Parts
1. Examine the gear bores in both gear plates, ref-
erence Figure 3-7. During the initial break-in,
the gears cut into the gear plates. The nominal
depth of this cut is 0.203 mm (0.008 in.) and
should not exceed 0.381 mm (0.015 in.). As the
gear teeth cut into the gear plates, metal is
rolled against the pressure plates. Using a knife
or sharp pointed scraper, remove the metal that
was rolled against the pressure plates. Remove
all metal chips that were broken loose.
When removing the rolled up metal, do not
attempt to remove the gear track-in grooves.
2. Examine the pressure plates. They should not
show excessive wear on the bronzed side. If
deep curved wear marks are visible, discard
and replace with new.
3. Examine the gears. If excessive wear is visible
on the journals, sides, or face of the gears, or at
the point where the drive gear rotates in the lip
seal, discard and replace with new.
4. If any of the internal parts show excessive wear,
replace with new. Replace all O-rings and seals
with new.
L03039
5. Inspect the bearings, if they are worn beyond
the gray teflon into the bronze material, the
complete flange connector plates or bearing
plate should be replaced.
NOTE: Replacing new bearing in the flange,
connector
recommended due to close tolerances and special
tooling required for crimping the bearing in place to
prevent bearing spin.
6. Inspect the flange seal bore for scratches or
gouges which may interfere with shaft seal
installation.
7. For additional pump and system inspection
refer to the Troubleshooting Guide.
FIGURE 3-7. GEAR BORE INSPECTION
1. Gear Track-In
Hydraulic Component Repair
plates or bearing plate
2. Gear Plate
is not
L3-9