Preventative Maintenance Procedure - Komatsu 730E Operation & Maintenance Manual

OM4035.2 02/03
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 oper-
ation. Grease usage should be consistent from day-
to-day operations.
•Lack of lubricant usage would indicate an inopera-
tive system. Excessive usage would indicate a bro-
ken 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 lubricant
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 Injector.

PREVENTATIVE MAINTENANCE PROCEDURE

This will indicate if there are any frozen or plugged
bearings, and will help flush the bearings of con-
taminants.
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. Lift the passenger seat and connect a jumper
wire between "SOL" and "LUBE SW" on the lube
cycle timer or activate test switch if installed.
The hydraulic grease pump should operate.
d. Keep the system activated until the pump stalls
out or the pressure switch closes.
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 inspect-
ed under pressure remove the jumper wire be-
tween the "SOL" terminal and "LUBE SW"
terminal on the timer assembly or open test
switch. The pump should shut off and the pres-
sure in the system should drop to zero, venting
back to the grease reservoir.
g. 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.
h. Reinstall all injector cover caps.
i. Check timer operation.
Note: With engine running, lube system should activate
within 5 minutes. The system should build 2000 to 2500
psi 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.
1000 Hour Inspection
1. Check pump housing oil level.
Maintenance - Section 4
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