File No:Issue date:Subject:Purpose: PN05-001September 30, 2005 Importance of Oil and Oil Filter Service This Parts News is intended to provide you with the important information regarding regular oil and fil-ter change including each function, which you are obliged to give a convincing explanation to your dealers and customers so that your customers can satisfactorily use their forklifts always operating at peak performance in tiptop shape for a long period of time. Komatsu Forklift Co.,Ltd. > Customer Support Dept. International Div. 2-3-4, Akasaka Minato-ku, Tokyo size="-4">

Therefore, it is quite natural that notonly engine oil and hydraulic oil but also filter element or air cleaner of forklift deteriorate much faster than truck. > a Anyway, there is a huge differencebetween forklift and truck regarding applications and load conditions. > If you compare the vehiclesequipped with almost the same capacity engine, the service weight of forklift is much heavier than truck and the rated capacity is bigger than the loading capacity of truck by about 50 %. Moreover, the frequency of load changes is incomparably high in the operation of forklift repeating loading and unloading,...

The structure of forklift body is strong enough tohold a heavy payload. Also, forklift is equipped with a heavy counterweight, which means serv- ice weight is extremely heavier than truck. Consequently, the engine of forklift needs all its strength to maneuver even at the time of carry- ing no payload. > Comparing with forklift and truck equipped with engine of the same class, you can see the rated capacity of forklift or the loading capacity of truck is extremely different. Refer to the compar- ison table on page 5. As for forklift, in addition to the service weight, the weight of payloads is...

Engine oil has limited life ז after a certainpoint it starts losing lubricating qualities and carbonizes. Once it happens, the engine gets contaminated with carbon deposit or sludge. When you miss your oil change, the engine starts wearing much faster with scuffing engine parts. Thats why regular oil changes are so important to keep the engine in a good shape for a long period of time. > Piston damaged by the dirt-contaminated oil Engine oil filter works to purify sediment of impurities including metal particles and carbon or sludge contained in the oil. But once carbon deposits start clogging...

Abrasive wear of piston, piston ring andcylinder liner can be seen after inhaling dirt inside the engine due to damaged ele- ment, which eventually may cause decreasing compression and loss of engine power. Moreover, the engine burns out faster by leaking oil from the scuffing space, which may cause increased fuel consumption. > Wearing out of piston contaminated by dirt The plunger of fuel injection pump is pre- cisely fitted to the barrel with very small clearance to form a perfect sealing and moves hard following to engine rotation. If the dirt-contaminated fuel enters the preci- sion clearance,...