Komatsu — HYDRAULIC TANK SERVICE

OM4012.1 03/01 Maintenance - Section 4 Lubrication & Service Page 4-1 LUBRICATION AND SERVICE Recommended Preventive Maintenance will contribute 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 the recom- mended intervals is most important. HYDRAULIC TANK SERVICE There are two sight gauges on the side of the hydraulic tank. With engine stopped, keyswitch “off”, hydraulic system bled down and body down, oil should be visible in the top sight gauge. If hydraulic oil is not visible in the top sight gauge, follow “Adding Oil” instructions below.

Lubrication requirements are referenced to the lube key found in the Truck Lubrication Specifications Chart (page 4-2). For detailed service requirements for spe- cific components, refer to the Shop manual section for that component (i.e. Section “H” for Suspensions, Sec- tion “L” for Hydraulic System, etc.). Adding Oil Keep the system open to the atmosphere only as long as absolutely necessary to lessen chances of system contamination. Refer to manufacturer’s service manual when servicing any components of the General Electric System. Service the tank with clean Type C-4 hydraulic oil only. All oil being put into the hydraulic tank should be filtered through 3 micron filters.

Refer to engine manufacturer’s service manual when servicing the engine or any of its components. 1. With engine stopped, keyswitch “off”, hydraulic system bled down and body down, check to see that hydraulic oil is visible in the top or lower sight gauge. The service intervals presented here are in hours of operation. These intervals are recommended in lieu of an oil analysis program which may determine different intervals . However, if the truck is being op- erated under extreme conditions, some or all, of the intervals may need to be shortened and the service performed more frequently. 2.

If hydraulic oil is not visible in the lower sight gauge, remove the tank fill cap and add clean, filtered C-4 hydraulic oil (Lubrication Chart, Lube Key “B”) until oil is visible in the top sight gauge. The 930E Truck is equipped with a Lincoln Automatic Lubrication System. The initial setup for this system provides for nominal amounts of lubricant to be deliv- ered to each serviced point. The lubrication injectors can be adjusted to vary the amount of lubricant deliv- ered. In addition, the timer for lubrication intervals is normally adjustable. For adjustments to these devices, consult the “Lincoln Automatic Lubrication System” later in this section of the manual. 3. Replace fill cap. 4.

Start engine. Raise and lower the dump body three times. 5. Repeat steps 1 through 4 until oil is maintained in the top sight gauge with engine stopped, body down, and hydraulic system bled down. 930E SERVICE CAPACITIES Crankcase: (including lube oil filters). DDC/MTU 16V4000 Engine Liters U.S. Gallons 220 58 Cooling System: DDC/MTU 16V4000 Engine 606 160 Hydraulic System: Refer to “Hydraulic Tank Service”. 1325 350 Wheel Motor Gear Box (each side) 76 20 Fuel Tank (Diesel Fuel Only) 4542 1200