Komatsu 830E-AC Shop Manual page 1032

LUBRICANT PUMP
Pump Housing Oil Level
The pump housing must be filled to the proper level
with SAE 10W-30 motor oil. Oil level should be
checked at 1000 hour intervals. To add oil, remove
pipe plug (4, Figure 3-5) and fill housing to bottom of
plug hole.
Pump Pressure Control
High pressure hydraulic fluid from the truck steering
system is reduced to 2240 - 2413 kPa (325 - 350 psi)
by the pressure reducing valve located on the mani-
fold on top of the pump motor. This pressure can be
read on the gauge installed on the manifold and
should be checked occasionally to verify pressure is
within the above limits.
Pressure Control Valve Adjustment
1. With the truck engine on, activate the test
switch (2, Figure 3-5) to start the hydraulic
motor and pump.
2. Loosen the locknut on the pressure control (1,
Figure 3-5) by turning the nut counterclockwise.
3. Turn the valve stem counterclockwise until it no
longer turns. (The valve stem will unscrew until
it reaches the stop - it will not come off.)
NOTE: This is the minimum pressure setting, which
is approximately 1172 kPa (170 psi).
4. With the pump stalled against pressure, turn the
pressure control valve stem clockwise until
2240 - 2413 kPa (325 - 350 psi) is attained on
the manifold pressure gauge (3).
5. Tighten the locknut to lock the stem in position.
Note: The flow control valve (5) is factory adjusted to
9.5 lpm (2.5 gpm). Do not change this setting.
P3-8
1. Pump Pressure Control
2. Test Switch
3. Pressure Gauge
Automatic Lubrication System
FIGURE 3-5. PUMP CONTROLS
4. Oil Level Plug
5. Flow Control Valve
P03030