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OM4006.2 10/98
Automatic Lube System
The following maintenance procedures should be used to insure proper system operation.
Daily Lubrication System Inspection
1. Check grease reservoir level.
Inspect grease level height after each shift of
operation. Grease usage should be consistent
from day-to-day operations.
• Lack of lubricant usage would indicate an
inoperative system.
• Excessive usage would indicate a broken sup-
ply line.
2. Check all grease feed lines hoses from the SL-1
Injectors to the lubrication points (Figure 4-6).
a. Repair or replace all worn / broken feed line
hoses.
b. Make sure that all air is purged and all new feed
line hoses are filled with grease before sending
the truck back into service.
3. Inspect key lubrication points for a bead of lubri-
cant around seal.
Make note of all lubrication points that look dry.
Notify maintenance staff for repair service.
250 Hour Inspection
1. Check all grease feed line hoses from the SL-1
Injectors to the lubrication points (Figure 4-6).
a. Repair or replace all worn / broken feed line
hoses.
b. Make sure that all air is purged and all new feed
line hoses are filled with grease before sending
the truck back into service.
2. Check all grease supply line hoses from the pump
to the SL-1 injectors.
a. Repair or replace all worn / broken supply lines.
b. Make sure that all air is purged and all new
supply line hoses are filled with grease before
sending the truck back into service.
3. Check grease reservoir level.
a. Fill reservoir if low.
b. Check reservoir for contaminants.
Clean, if required.
c. Check that all filler plugs, covers and breather
vents on the reservoir are intact and free of
contaminants.
Preventive Maintenance Procedures
4. Inspect all bearing points for a bead of lubricant
around the bearing seal.
It is good practice to manually lube each bearing
point at the grease fitting (Zerk, Figure 4-8) pro-
vided on each Injector. This will indicate if there
are any frozen or plugged bearings, and will help
flush the bearings of contaminants.
5. System Checkout
a. Remove all SL-1 injector cover caps to allow
visual inspection of the injector cycle indicator
pins during system operation.
b. Lift the passenger seat and connect a jumper
wire between the ''SOL'' terminal and the ''LUBE
SW'' terminal on the 24VDC solid state timer
(Figure 4-11).
c. Start engine. The hydraulic grease pump
should operate.
d. Keep the jumper wire connected until the pump
stalls out at 2000 PSI.
e. With the pump in the stalled-out mode, check
each SL-1 injector assembly.
The cycle indicator pin should be retracted
inside the injector body.
f. Once all of the SL-1 injectors have been in-
spected under pressure, remove the jumper
wire between the ''SOL'' terminal and ''LUBE
SW'' terminal on the timer assembly. The pump
should shut off, and the system should vent
back to the grease reservoir, and the pressure
should drop to zero.
g. With the system vented, check all of the SL-1
injector indicator pins.
All of the pins should be visable.
NOTE: Refer to the system troubleshooting
chart, if the injectors are not working properly.
Replace or repair injectors, if defective.
h. Reinstall all injector cover caps.
i. Check timer operation.
With engine running, lube system should acti-
vate within 5 minutes. The system should build
2000PSI within 25-40 seconds.
j. If the system is working properly, the machine
is ready for operation.
k.If the system is malfunctioning, refer to the trou-
bleshooting chart in the service manual.
Maintenance - Section 4
Page 4-25
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