Komatsu 830E Shop Manual page 418

FIGURE 3-10. PUMP REASSEMBLY
1. Gear Plate
2. Drive Gear
3. Idler Gear
4. Bearing
5. Steel Ring
6. Retainer
10. Install steel rings (5, Figure 3-10). Lubricate and
install backup ring (8), O-ring (7) and ring retainer
(6) as shown in Figure 3-10.
11. Install the isolation plate (9) on the suction side of
the gear plate. The isolation plate has a relief
area milled on one side, turn that side up or
toward the pressure plate.
12. With the bronze side up and the milled slot facing
toward the discharge side, slide pressure plate
(2, Figure 3-11) down into the gear bores until it
rests on the backup ring and O-ring. Do not force
the plate down the gear bores. If it hangs up on
the way down, work it back and forth until it slides
freely into place.
13. Coat the inside of the gear plate and the gears
with clean hydraulic oil.
L3-8
7. O-Ring
8. Backup Ring
9. Isolation Plate
10. Relief Area
11. Thru Studs
Hydraulic Component Repair
FIGURE 3-11. PRESSURE PLATE INSTALLATION
1. Gear Plate
2. Pressure Plate
NOTE: To ensure the gear pump is correctly timed
during reassembly, place a mark on the end of the
input shaft to indicate the location of the valley
between any two gear teeth. Refer to Figure 3-12
which illustrates gear pump timing.
FIGURE 3-12. PUMP GEAR TIMING
14. With the extension end of the drive gear facing
toward the shaft seals, install the drive gear. Do
not drop the gear in the bore as damage to the
bronze face of the pressure plate could result.
Use care when pushing the drive gear extension
thru the shaft seals. Install the idler gear.
3. Slot
7/02 L03026