P3-10 Automatic Lubrication System P03022
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 (6, 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 3-8) 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 selected time tolerance.
4. Voltage checks at the timer should be accom-
plished 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
between positive and negative posts on the
solid state timer with the truck keyswitch
"ON".
Normal reading should be 18-26 VDC,
depending upon whether or not the engine is
running.
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 seconds. A longer interval (off time) is obtained by
turning the Selector knob (3, Figure 3-8) to the
desired position.
NOTE: Set timer by turning the Selector knob (3) to
the 2.5 minute setting point. Then, turn the Selector
clockwise, 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 disas-
sembly.
FIGURE 3-8. TIMER (TOP COVER REMOVED)
1. Timer Enclosure
2. Red LED (Light Emitting Diode)
3. Timer Selector
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