Doosan 7/73-10/53, Operation And Maintenance Manual

Page: 35 / 68

MAINTENANCE 31
7/73 - 10/53
Excessive operation of the handbrake lever, which may have been
caused by worn brake linings, must not be corrected by re-adjusting
(shortening) the brake linkage [7]
Re-adjustment
The handbrake lever [1] should be engaged forcefully several times to
set the braking system.
Check the setting of the brake equalisation assembly [8], which should
be at right angles to the pulling direction.
Check the play in the brake linkage [7] again, ensuring that there is no
play in the brake linkage and that it is adjusted without pre-tension
Check the position of the hand brake lever [1], cable [5] (with little play)
and the compression spring [9] (only slight pre-tension). The start of
resistance of the handbrake lever should be approximately 10-15mm
above the horizontal position.
Final test
Check the fastenings on the transmission system (cables, brake
equalisation system and linkage)
Apply the handbrake while rolling the machine forward, travel of the
handbrake lever up to 2/3 of maximum is allowed.
Check the handbrake cable [5] for a small amount of play and adjust if
necessary (Variable height only)
Check the compression spring [9] for slight pre-tensioning.
LUBRICATION
The engine is initially supplied with engine oil sufficient for a nominal
period of operation (for more information, consult the Engine section of
this manual).
If, for any reason, the unit has been drained, it must be re-filled with
new oil before it is put into operation.
ENGINE LUBRICATING OIL
The engine oil should be changed at the engine manufacturer’s
recommended intervals. Refer to the Engine Manual supplied with this
machine.
ENGINE LUBRICATING OIL SPECIFICATION
Refer to the Engine Manual supplied with this machine.
ENGINE OIL FILTER ELEMENT
The engine oil filter element should be changed at the engine
manufacturer’s recommended intervals. Refer to the Engine Manual
supplied with this machine.
LUBRICATING OIL FILTER (SPIN-ON)
Removal
Clean the area around the lubricating oil filter head.
Use an oil filter wrench, or a 1/2 inch drive (bottom of the oil filter) to
remove the filter.
Clean the sealing surface of the filter head.
Installation
CAUTION: Check the wheel nut torque 20 miles (30 kilometres) after
refitting the wheels (Refer to the TORQUE SETTING TABLE later in
this section).
CAUTION: Always check the oil levels before a new machine is put
into service.
CAUTION: The lack of lubrication during the delay until the filter is
pumped full of oil at start-up can damage the engine.