Preventative Maintenance Procedures
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 in-
operative system. Excessive usage would in-
dicate a broken supply line.
2. Check filter bypass indicator when filling reservoir.
Replace element if bypassing.
3. Check all grease feed line hoses from the SL-1
Injectors to the lubrication points.
a. Repair or replace all damaged 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.
4. Inspect key lubrication points for a bead of lubri-
cant around seal. If a lubrication point appears
dry, troubleshoot and repair problem.
250 Hour Inspection
1. Check all grease feed line hoses from the SL-1
Injectors to the lubrication points (see, Figure
3-2).
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.
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 provided on each Injec-
tor. 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. Start truck engine.
c. Actuate the Lube System Test Switch. The
hydraulic motor and grease pump should oper-
ate.
d. With the grease under pressure, check each
SL-1 injector assembly.
The cycle indicator pin should be retracted
inside the injector body.
e. When the system attains 2500 psi (17 237
kPa), the pump should shut off and the pres-
sure in the system should drop to zero, venting
back to the grease reservoir.
f. With the system vented, check all of the SL-1
injector indicator pins; all of the pins should be
visible. Replace or repair injectors, if defective.
g. Reinstall all injector cover caps.
h. Check timer operation.
Note: With engine running, lube system should acti-
vate within 5 minutes. The system should build 2000
to 2500 psi within 25-40 seconds.
i. If the system is working properly, the machine
is ready for operation.
j. If the system is malfunctioning, refer to the
troubleshooting chart.
1000 Hour Inspection
1. Check pump housing oil level and correct if nec-
essary.
P3- 16 Automatic Lubrication System P03018 4/00
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