Grillo DUMPER 406 Uso Y Mantenimiento página 10

2) PRECAUTIONS WHEN DRIVING
1) Avoid jerky operations when the crawler truck is in motion.
2) Keep the rubber crawler track away from sharp edges of concrete etc.
3) Cracks on the outside surface of the rubber track (in contact with the ground) are very often due to
contact with gravel, sharp stones and sharp materials such as sheet metal, nails and glass.
3) AVOID SUDDEN CHANGES IN DIRECTION
must be avoided since they might cause cuts in the rubber.
4) AVOID CONTAMINATION WITH OIL
occur, clean immediately.
5) REPLACING THE SPROCKET
If abrasions and wear are noted on the sprocket, it must be replaced as soon as possible since in these
conditions it might cause abrasion or reveal the metal core.
Worn drive sprocket
6) OPERATING TEMPERATURE
The ideal operating temperature for the rubber crawler track is between -25° and 55° C, because of the
fundamental properties of the rubber.
ADJUSTMENTS
The steering levers are adjusted using the 2 lock-nuts as shown in Fig. 12.
The steering clutch consists of a perforated disc which is engaged by a lever; when the lever is not in
the hole there must be 0,3 mm clearance on the rod secured by the lock-nut (Fig. 13).
STEERING BRAKES AND LEVERS
Lift the machine from the ground and tighten the 2 self-locking nuts completely (please refer to Fig.12,
gear and engage the feed lever: the rubber tacks do not turn, slowly unscrew the two self-locking nuts
(refer to Fig. 12). As soon as the tracks start moving unscrew the nuts for one more revolution.
Caution: never touch the tracks whilst carrying out adjustments.
The brake rods must have a 1 mm clearance (refer to Fig. 14): push on the lever controlling the brake-
shoes until contact is made, then adjust the nut.
SECURITY BRAKE AUTOMATICALLY OPERATED
To adjust the brake act on the register Fig. 16 point B.
THE WORN PARTS ARE
SHOWN BY DOTTED LINES
Fig. 11
11