Komatsu — EVERY 500 HOURS SERVICE

. MAINTENANCE SERVICE PROCEDURE CHECK FAN BELT FOR WEAR AND REPLACE WARNING REPLACING 3. Push bracket (5) in as shown in the figure, tilt it up and then secure it with bolt (4) hard enough to stop it from moving. 4 - 70 When ca rrying out inspectio n and maintenance, alway s hang a "DO NO T OPERATE " warning sign on the gear shift lever. If a nyone operate s the machine when someone is carrying out i nspection , that p erso n may b e caught in the r otating or moving parts of the machine and suffer serious i njury. f cutting your fingers off in the pulley groove. In addition, there is danger o f cutting your fingers off in the pu lley groove.

Check the V-belt, and rep lace the V-belt if the c ondition is as f ollows. y The V-belt is in contac t with the bottom of the groove of eac h pulle The V-belt is worn and has sunk below the o utside di amete r of the pulley The V-belt is cracked or peeling When r eplacing the V-be 1. Loosen lock nut (1) a nd then loosen adjust screw (2 Remove two bolts (3) can be moved. and then loosen bolt (4) until bracket (5) 4. Disconnect the grea tension pulley lever t bolt down hard with a se hose at portion (6), screw a bolt in apped hole (7) (M12 x 1.75) and pull the crowbar. The V-belt stretches as it is used, so the length is dif ferent fro m that of a new bel t.

If new belts and old belts are used togeth er, the l oad will be applied only to the new V-be lt, and this may cause th e V-belt t o break.