Lubrication Cycle Timer Adjustment; Preventive Maintenance Inspection; 10 Hour Lubrication System Inspection; 250 Hour Inspection - Komatsu 730E Operation & Maintenance Manual

OM4211 07/09
Automatic Lubrication System

Lubrication Cycle Timer Adjustment

The timer is set at the factory for a nominal 2.5 min-
ute (off time) interval. Dwell time is approximately 75
seconds. A longer interval (off time) is obtained by
turning the timer selector to the desired position.
Set the timer by turning the timer selector to the 2.5
minute setting. Then turn the selector clockwise one
detent at a time to the desired setting, or until the
maximum limit of 80 minutes is reached.
This timer will sense whether minimal pressure was
reached by rear axle switch. If minimal pressure is
not achieved during pump cycle, warning system will
lock on until manually reset.
NOTE: The timer is a sealed unit. DO NOT attempt to
disassemble it.

PREVENTIVE MAINTENANCE INSPECTION

Use the following maintenance procedures to ensure
proper system operation.

10 Hour Lubrication System Inspection

1. Check the grease reservoir level.
Inspect the grease level height after each shift
of operation. The grease usage must be consis-
tent from day-to-day operations.
Lack of lubricant usage would indicate an inop-
erative system. Excessive usage would indicate
a broken supply line.
2. Check the filter bypass indicator when filling the
reservoir. Replace the element if bypassing.
3. Check all the grease hoses from the SL-1 injec-
tors to the lubrication points.
a. Repair or replace all damaged feed line
hoses.
b. Ensure all air is purged and all new feed line
hoses are filled with grease before sending
the truck back into service.
4. Inspect the key lubrication points for a bead of
lubricant around the seal. If a lubrication point
appears dry, troubleshoot and repair the prob-
lem.

250 Hour Inspection

1. Check all grease hoses from the SL-1 injectors
to the lubrication points. Refer to Figure 42-2.
a. Repair or replace all worn and broken hoses.
b. Ensure all the air is purged and all new feed
line hoses are filled with grease before send-
ing 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 and broken supply
lines.
b. Ensure all air is purged and all new supply
line hoses are filled with grease before send-
ing the truck back into service.
3. Check the grease reservoir level.
a. Fill the reservoir if low. Check the filter
bypass indicator when filling the reservoir.
Replace the element if bypassing.
b. Check the 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 lubricate each
bearing point at the grease fitting provided 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 indica-
tor pins during system operation.
b. Start the truck engine.
c. Actuate manual override switch (6, Figure
42-1). The hydraulic motor and grease pump
must operate.
Maintenance - Section 42
Page 42-13