26. OUTLINE OF SERVICE
4-1
26. OUTLINE OF SERVICE
• Use Komatsu Forklift genuine parts for replacement.
• When changing or adding oil, use only the oil that is recommended. Do not use a different kind or grade of oil.
• Unless otherwise specified, the oil and coolant used at delivery from the factory shall be as listed below.
26.1 OIL
• Since the oil is used for the work equipment, etc., under severe conditions (at high temperature and high pres-
sure), it will deteriorate as operating time passes. Always use an oil matching the grade and working tempera-
tures given in the Operation Manual.
• Always replace the oil at specified time intervals even if it is not deteriorated.
• Oil is often compared to human blood. A lift truck should be maintained with the same care taken for the human
body so that impurities (water, metal chips, dust, etc.) do not enter the lift truck system.
• Most lift truck malfunctions are caused by the entry of impurities.
• Take special care to avoid the entry of impurities during storage and lubrication, etc.
• Never blend oils of different grades or brands.
• Add specified volume of oil. Too little or too much oil may both cause problems in the fork lift truck.
• If the oil in the work equipment becomes cloudy, it is likely that air or water have entered the circuit. Consult a
Komatsu Forklift dealer.
• When replacing oil, replace the relevant filters at the same time.
26.2 GREASE
• Grease prevents wear and tear and the generation of squeaking noise from the joints, etc.
• Lift trucks are provided with grease nipples in various places. Some of these are not mentioned in this manual
since they are for overhauling purposes and do not require greasing.
• If friction is noticed in movable parts after operation, grease them.
• After greasing, wipe off any old grease that is forced out, especially on rotating parts that will be worn by adher-
ing sand and dirt.
26.3 OIL STORAGE AND PRESERVATION
• Store and preserve oil so as to prevent entry of dirt, dust, water or other contaminants.
• When storing oil drums for long periods, place them side-by-side with filler sides facing in the same direction.
• If necessary to store drums outdoors, cover them with waterproof sheeting. Ensure that the screw caps
(bung plugs) are tight.
• To prevent oil deterioration during long periods of storage, use drums on a “first-in, first-out” basis.
26.4 FILTERS
• Filters are very important safety items which prevent problems caused by impurities contained in the oil or
hydraulic circuit which sends oil into important units. Periodically replace the filters referring to this manual.
• When replacing oil filters, check for metal powder or shavings deposited on the used filters.
• Do not unpack replacement filters until immediately before installation.
• Always use genuine Komatsu Forklift filters.
Item Type of fluid
Engine oil
SAE 10W30 (gas/LPG)
SAE 30W (diesel)
Differential case SAE 90
Hydraulic tank ISO # 32 Hydraulic Fluid
TORQFLOW transmission case Dexron Automatic Transmission Fluid
Cooling system Fresh water and Glycol-based Coolant
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