OM4064 06/11 Maintenance - Section 40
Lubrication and Service Page 40-1
LUBRICATION AND SERVICE
GENERAL INFORMATION
The recommended preventive maintenance will con-
tribute to the long life and dependability of the truck and
its components. The use of proper lubricants and the
performance of checks and adjustments at recom-
mended intervals is most important.
Lubrication requirements are referenced to the lube
key found in the Lubrication chart in this section. For
detailed service requirements for specific components,
refer to the shop manual.
Refer to the manufacturer's service manual when ser-
vicing any components of the General Electric system.
Refer to the engine manufacturer's service manual
when servicing the engine or any of its components.
The service intervals presented here are in hours of
operation. These intervals are recommended as a sub-
stitute for an oil analysis program, which may deter-
mine different intervals. However, if the truck is being
operated in extreme conditions, some, or all of the
intervals, may need to be shortened and the service
performed more frequently.
Komatsu trucks are equipped with an automatic lubri-
cation system. The system is designed to automatically
deliver the proper amount of lubricant to a specified
lubrication point such as a steering cylinder pin or body
pivot pin. This system uses lubrication injectors, one for
each lubrication point, which can be adjusted to supply
the precise amount of lubricant to each specific lubrica-
tion point. A timer is also designed into the system to
activate the lube pump on a preset interval. This time
interval is adjustable, depending on the requirements
for lubrication. For additional information on the sys-
tem, refer to Automatic Lubrication System in this man-
ual.
HYDRAULIC TANK SERVICE
There are two sight gauges on the side of the hydraulic
tank. With the engine stopped, key switch OFF, hydrau-
lic system bled down and body down, oil should be vis-
ible in the top sight gauge. If hydraulic oil is not visible
in the top sight gauge, follow Adding Oil instructions
below.
Adding Oil
Keep the system open to the atmosphere only as long
as absolutely necessary to lessen the chances of sys-
tem contamination.
Service the tank with clean Type C-4 hydraulic oil only.
All oil being put into the hydraulic tank must be filtered
through filters rated at three microns.
1. Ensure that the engine is stopped, key switch is
OFF, hydraulic accumulators depressurized, and
body is down.
2. Remove fill cap (2, Figure 40-1) and add hydraulic
oil until the oil level is visible in the center of the
top sight gauge.
3. Install the fill cap.
4. Start the engine. Raise and lower the dump body
three times.
5. Check the hydraulic oil level again with the engine
stopped, key switch OFF, hydraulic accumulators
depressurized, and body down.
6. Repeat Steps 1 - 5 until the oil level is maintained
in the center of the top sight gauge.
730E SERVICE CAPACITIES
Crankcase
(including lube oil filters)
Liters
US
Gallons
223 59
Cooling System 409 108
Hydraulic System 731 193
Wheel Motor Gear Box
(each side)
40 10.5
Fuel Tank (diesel fuel only) 3 217 850
1. Sight Gauges 2. Fill Cap
FIGURE 40-1. HYDRAULIC TANK SERVICE
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