Preventive Maintenance Procedures; Daily Lubrication System Inspection; 250 Hour Inspection - Komatsu 930E-4SE Operation & Maintenance Manual

OM4213 7/11
PREVENTIVE MAINTENANCE
PROCEDURES
Use the following maintenance procedures to ensure
proper system operation.

Daily Lubrication System Inspection

1. Check the grease reservoir level after each shift
of operation. Grease
consistent from day-to-day operations. Lack of
lubricant usage would indicate an inoperative
system. Excessive usage would indicate a
broken supply line.
2. Check filter bypass indicator when filling
reservoir. Replace element if bypassing.
3. Check all grease hoses from the SL-1 Injectors
to the lubrication points.
a. Repair or replace all damaged feed line
hoses.
b. Ensure that all air is purged and all new feed
line hoses are filled with grease before
returning the truck to service.
4. Inspect the key lubrication points for a bead of
lubricant around seal. If a lubrication point
appears dry, troubleshoot and repair problem.

250 Hour Inspection

1. Check all grease hoses from the SL-1 Injectors
to the lubrication points (see Figure 42-2).
a. Repair or replace all worn or broken hoses.
b. Ensure that all air is purged and all new feed
line hoses are filled with grease before
returning the truck to 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. Ensure that all air is purged and all new
supply line hoses are filled with grease
before returning the truck to service.
3. Check the grease reservoir level.
a. Fill the reservoir if the grease level is low.
Check the filter bypass indicator when filling
the reservoir. Replace the element if
bypassing.
b. Check the reservoir for contaminants. Clean
the reservoir, if required.
c. Ensure that all filler plugs, covers and
breather vents on the reservoir are intact and
free of contaminants.
usage should be
Automatic Lubrication System - Section 42
4. Inspect all bearing points for a bead of lubricant
around the bearing seal.
It is good practice to manually lube each bear-
ing point at the grease fitting provided on each
Injector. This will indicate if there are any frozen
or plugged bearings, and it 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 lube system override switch (6,
Figure 42-1). The hydraulic motor and
grease pump should operate.
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 is at 16 203 - 17 237 kPa
(2,350 - 2,500 psi), the pump should shut off
and the pressure in the system should drop
to zero, venting back to the grease reservoir.
f. After the system has vented, check the SL-1
injector indicator pins. All of the pins should
be visible. Replace or repair any defective
injectors.
g. Install all injector cover caps.
h. Check the lubrication timer operation.
NOTE: With the engine on, the lube system should
activate within five minutes. The system should build
to 13 790 kPa (2,000 psi) at the rear axle during
normal pump cycle.
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 the pump housing oil level using the
dipstick on top of the pump unit. If necessary,
add SAE 10W-30 motor oil.
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