System Checkout - Komatsu 730E Operation & Maintenance Manual

Maintenance - Section 4
Page 4- 22

SYSTEM CHECKOUT

To check system operation (not including timer), pro-
ceed as follows:
1. Turn keyswitch "ON" and start the engine.
2. Actuate the manual override (11, Figure 3-1) on
the end of the solenoid valve.
3. The pump should operate and the system should
build grease pressure.
4. When the pump stalls, release the manual over-
ride knob and motor should turn Off. The vent
valve should open to vent grease pressure from
the injector bank feeder lines.
24 VDC TIMER CHECK
To check the timer operation without waiting for the
normal timer setting, proceed as follows:
1. Remove timer dust cover.
NOTE: The timer incorporates a liquid and dust
tight cover which must be in place and secured at
all times during truck operation.
2. Adjust timer selector (3, Figure 3-9) to 5 minute
interval setting.
3. The timer should cycle in five minutes if the truck is
operating.
NOTE: If the timer check is being made on a cold start,
the first cycle will be approximately double the nominal
setting. All subsequent cycles should be within the se-
lected time tolerance.
4. Voltage checks at the timer should be accomplished
if the above checks do not identify the problem.
a. Insure timer ground connection is clean and tight.
b. Using a Volt-Ohm meter, read the voltage be-
tween positive and negative posts on the solid
state timer with the truck keyswitch "ON".
Normal reading should be 18-26 VDC, depend-
ing upon whether or not the engine is running.
FIGURE 3-9. TIMER (TOP COVER REMOVED)
1. Timer Enclosure
2. Red LED (Light Emitting Diode)
3. Time Selector
Lubrication Cycle Timer Adjustment
The timer is factory set for a nominal 2.5 minute (off time)
interval. Dwell time is approximately 1 minute, 15 sec-
onds. A longer interval (off time) is obtained by turning
the Selector knob (3, Figure 3-9) to the desired position .
NOTE: Set timer by turning the Selector knob (3) to the
2.5 minute setting point. Then, turn the Selector clock-
wise, one detent at a time, to the desired setting, or until
the maximum limit of eighty minutes is reached.
The timer is a sealed unit, do not attempt disassem-
bly.
OM4035.2 02/03
Automatic Lube System