Komatsu D31EX-21, Operation & Maintenance Manual, Page: 165 / 256

OPERATION
TROUBLESHOOTING
3-113
TROUBLESHOOTING 3
AFTER RUNNING OUT OF FUEL 3
When restarting the machine after running out of fuel, fill with fuel and bleed the air from the fuel system before
starting.
For details of bleeding the air, see “REPLACE FUEL FILTER CARTRIDGE (4-45)“.
MACHINE TOWING METHOD 3
WARNING
q
If the engine does not start, put blocks under the tracks to prevent the machine from moving, then
release the brake. If blocks are not put under the tracks, the machine may suddenly move.
q
Be sure to use a wire rope sufficiently strong for the towing weight.
q
When using the towing hook, be sure to use a shackle.
q
Set the wire rope horizontally and align it with the track frame.
q
Tow the machine slowly.
q
When returning a towed machine to the jobsite, first check that the necessary repairs and adjustments
have been made.
For details of the method of towing, please contact your Komatsu distributor.
q
With this machine, if the engine stops or there is an abnormality in the hydraulic system and the oil pressure in
the brake circuit drops, the brake is actuated to prevent the machine from moving. To move the machine, it is
necessary to use a special device to set the oil pressure in the brake circuit to above the specified pressure,
so see the section “WHEN ENGINE DOES NOT START (3-115)“ to release the brake, or contact your
Komatsu distributor.
q
Moving a machine by towing is only used to move it to a place where it is possible to carry out inspection and
maintenance. It is not intended for moving the machine long distances. Do not use this method for towing the
machine for long distances.
q
Before towing, check that the tow rope or bar are in good condition, and that they have ample strength for the
towing operation. If the machine being towed may get stuck in mud or may have to be towed uphill, the tow
rope or bar must be of a strength of at least 1.5 times greater than the weight of the machine being towed.
q
If it is impossible to operate the steering and brakes of the machine being towed, do not let anyone ride on the
machine.
q
To protect the operator if the towing rope or bar should break, fit a shield to the machine being towed.
q
When towing a machine, travel slowly. If the machine is suddenly pulled, the towing rope may break. Before
starting to move the towed machine, remove any slack in the rope, and keep the rope taut during the towing
operation.
q
Keep the angle of the towing line to the minimum. Operate the machine so that the angle does not become
greater than 30° from the straight line.