Grillo DUMPER 406 Manual De Instrucciones página 12

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
Sharp turns on concrete surfaces or excessive accelerations which generate high friction coefficients
must be avoided since they might cause cuts in the rubber.
4) AVOID CONTAMINATION WITH OIL
Fuels and hydraulic fluids must never come into contact with the rubber crawler track. If this should
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
Please note this adjustment must be carried out by a certified Grillo Service Centre.
Lift the machine from the ground and tighten the 2 self-locking nuts completely (please refer to Fig.12,
black arrows on the right hand-side of the picture). Now, start the engine, put the gearbox on the first
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
Please note this adjustment must be carried out by a certified Grillo Service Centre.
To adjust the brake act on the register Fig. 16 point B.
The machine must hold firmly even at full load and on a gradient.
Dumper 406/ Translation of the original instructions
THE WORN PARTS ARE
SHOWN BY DOTTED LINES
Fig. 11