Komatsu 830E-AC Shop Manual page 656

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
L3-12
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 exten-
sion thru the shaft seals. Install the idler gear.
15. Install the opposite pressure plate with the
bronze side down and the milled slot facing
toward the discharge side.
Hydraulic Component Repair L03039