Komatsu 830E-AC Shop Manual page 655

9. Lubricate the thru stud threads (14, Figure 3-9)
with hydraulic oil. Thread the studs into flange
until snug. There are 4 long studs and 4 short
studs. Reference Figure 3-10 for proper stud
location. Lubricate and install O-ring (7). Install
dowel pins (12), if removed. Install gear plate
(13). Make sure the recess in the gear plate will
be toward the connector plate, or facing up
when the gear plate is installed.
FIGURE 3-10. PUMP REASSEMBLY
1. Gear Plate
2. Drive Gear
3. Idler Gear
4. Bearing
5. Steel Ring
6. Retainer
L03039
7. O-Ring
8. Backup Ring
9. Isolation Plate
10. Relief Area
11. Thru Studs
Hydraulic Component Repair
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 fac-
ing 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.
FIGURE 3-11. PRESSURE PLATE INSTALLATION
1. Gear Plate
2. Pressure Plate
3. Slot
L3-11