28 MAINTENANCE
7/26E, 7/31E, 7/41
There must still be a little play in cable [5] (Variable Height Only)
Check the position of the hand brake lever [1]. The start of resistance
should be approximately 10-15mm above the horizontal position.
Check that the wheels move freely when the handbrake is disengaged.
Final test
Check the fastenings on the transmission system (cables, brake
equalisation system and linkage).
Check the handbrake cable [5] for a small amount of play and adjust if
necessary (Variable height only)
Check the compression spring [9] for pre-tensioning.
Test run
If necessary carry out 2-3 test brake actions.
Test brake action
Check the play in brake linkage [7] and if necessary adjust the length
of brake linkage [7] until there is no play.
Apply the handbrake while rolling the machine forward, travel of the
handbrake lever up to 2/3 of maximum is allowed.
Re-adjusting the overrun braking system
Re-adjustment of the wheel brakes will compensate for brake lining
wear. Follow the procedure described in 2: Brake Shoe Adjustment.
Check the play in the brake linkage [7] and re-adjust if necessary.
Important
Check the brake actuators and cables [11]. The brake actuators must
not be pre-tensioned.
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.
RUNNING GEAR WHEEL BEARINGS
Wheel bearings should be packed with grease every 6 months. The
type of grease used should conform to specification MIL-G-10924.
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 section of this manual.
ENGINE LUBRICATING OIL SPECIFICATION
Refer to the Engine section of this manual.
ENGINE OIL FILTER ELEMENT
The engine oil filter element should be changed at the engine
manufacturer’s recommended intervals. Refer to the Engine section of
this manual.
COMPRESSOR LUBRICATING OIL
Refer to the SERVICE/MAINTENANCE CHART in this section for
service intervals.
Completely drain the receiver/separator system including the piping
and oil cooler by removing the drain plug(s) and collecting the used oil
in a suitable container.
Replace the drain plug(s) ensuring that each one is secure.
COMPRESSOR OIL FILTER ELEMENT
Refer to the SERVICE / MAINTENANCE CHART in this section for
service intervals.
RUNNING GEAR WHEEL BEARINGS
Wheel bearings should be packed with grease every 6 months. The
type of grease used should conform to specification MIL-G-10924.
CAUTION: Check the wheel nut torque 20 miles (30 kilometres) after
refitting the wheels (Refer to the TORQUE SETTING TABLE later in
this section).
Periodically check the drawbar and axle to frame bolts for correct
torque. Should any of the threaded frame inserts appear damaged
then replace immediately with the right insert.
CAUTION: Always check the oil levels before a new machine is put
into service.
NOTE: If the machine has been operating under adverse conditions,
or has suffered long shutdown periods, then more frequent service
intervals will be required.
WARNING: DO NOT, under any circumstances, remove any
drain plugs or the oil filler plug from the compressor lubricating
and cooling system without first making sure that the machine
is stopped and the system has been completely relieved of all air
pressure (refer to STOPPING THE UNIT in the OPERATING IN-
STRUCTIONS section of this manual).
NOTE: If the oil is drained immediately after the machine has been
running, then most of the sediment will be in suspension and will
therefore drain more readily.
CAUTION: Some oil mixtures are incompatible and result in the
formation of varnishes, shellacs or lacquers which may be insoluble.
NOTE: Always specify PRO-TEC oil for use at all ambient
temperatures above -23°C.
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