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Maintenance - Section 4
Page 4-18
6. Observe the 5000 PSI (35 MPa) pressure test
gauge in the grease supply line. Pressure should
be 2500 - 3000 PSI (17.2 - 20.7 MPa).
DO NOT EXCEED Maximum Pump Pressure of 3500
p.s.i. (24.1 MPa). Exceeding this value will damage
components and/or cause components to rupture,
resulting in possible serious injury to any nearby
personnel.
If pressure is not correct, adjust the Pressure
Reducing Valve until the pressure gauge (installed
at step 1) indicates 2500 - 3000 PSI (17.2 - 20.7
MPa) grease pressure.
NOTE: DO NOT EXCEED 300 PSI (2.1 MPa) on
the Cylinder Pressure gauge (2, Figure 4-5).
7. While jumper wire is installed, verify that the fol-
lowing events occur in this order:
a. The pump starts stroking and the LED on the
flasher unit atop of SV2 flashes ''On'' and ''Off''
at approximately one second intervals.
b. All of the injectors stroke down.
c. Pump gets to a ''stalled state'' with no notice-
able piston movement.
8. Turn the keyswitch ''Off'' and remove jumper wire
installed in step 5, then verify the following:
a. The pressure on the Cylinder Pressure gauge
(2, Figure 4-5) drops to zero (0).
b. The pressure on the grease pressure test gauge
(installed at step 1) drops to zero (0).
c. All of the injectors reset (indicator pin up).
9. Remove grease pressure test gauge (installed at
step 1).
10. At the Hydraulic Bleeddown Manifold, reconnect
the Bleeddown Solenoid (disconnected in step 4).
Verify that hydraulic system now bleeds down.
24 VDC Solid State Timer Check
To check the solid state 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 to 5 minute interval setting.
3. The timer should cycle in five minutes if the truck
engine 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. With the truck keyswitch on, use a Volt-Ohm
meter and read the voltage between "BAT (+ )"
and "BAT (-)" terminals on the solid state timer.
Normal reading should be 18-26 VDC, depend-
ing upon whether or not the engine is running.
24 VDC Solid State 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 4-7) desired time
interval.
FIGURE 4-7. TIMER ADJUSTMENT (TOP COVER OFF)
NOTE: Set timer by turning the Selector Knob (3) to the
2.5 minute setting point. Then, turn the selector knob
clockwise, one detent at a time, to the desired setting,
or until the maximum limit of eighty minutes is reached.
The recommended setting is 20 minutes.
! CAUTION! The solid state timer is a sealed unit,
do not attempt disassembly.
OM4006.2 10/98
Automatic Lube System
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