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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...

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...

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...

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...

File No:Issue date:Subject:Purpose: The publication of Parts News has been made available since September 2005, which is intended to provide you with updated information on Komatsu parts supply control system for your better under- standing. At the same time, we believe that such information sure can help make good support for our custom- ers satisfaction with less trouble in good condition enjoying long service life, which also will enhance customers operating efficiency contributing to their earnings at the bottom line. > It is regret to see, in particular, that there are lots of...

Here is a case troubled with imitation filters that have actually caused a big maintenance problem of Komatsuwheel loader in China. A customer of six units Komatsu large-sized wheel loader had the engine seizure trouble, which the customer had to pay with the amount of the vehicles damages for repair reaching to US$400,000 since the root cause was attributable to the use of low quality oil filters purchased from imitation parts market as well as the use of low quality engine oil. Obviously, the oil filter could not remove impurities such as dirt and for- eign body contained in engine oil,...

File No:Issue date:Subject:Purpose: Genuine disc is designed to have service life expectancy of 1,000,000 times. In the photographs shown below left, the torsion spring was broken at 139,000 times, while the photographs below right shows the broken up tor- sion spring at 97,000 times. Thus, you can see the genuine disc has longer service life of 7.2 times at 200 and 10.3 times at 275 in durability compared with the imitation respectively. > This Parts News is intended to provide you with information how to distinguish differences between Komatsu genuine parts and counterfeit or imitation...