Goldacres Prairie Pro Operator's Manual page 108

Maintenan e
3 MONTHS
Grease the jack; there are two grease nipples on
the sprayer's jack. One on the winding mechanism
and one on the jack swing pivot. Both need to
be greased every three months to ensure easy
operation.
Check bolts on axle bearing caps; bearing caps must
be regularly checked and tightened if required. If
dust is able to enter the axle bearings it could cause
the bearings to fail. If the gasket on the dust cap is
damaged or not sealing properly it must be replaced.
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The brakes should be tested before using for the
first time and after the first laden ourney. Check
the actuator and return spring mountings, check the
actuator stroke and return travel and check they
operate and release correctly.
Tighten the screws and nuts (covers, fulcrum, etc),
check the cotter pins, pins, circlips, etc.
Check for hydraulic fluid and air leaks. Check brake
clearance and wear. Check and test the brakes
before intensive use and every 3 months.
Check the brake wear and the clearance between
the brake linings and the drum visually through the
inspection hole in the dust cover at the rear of the
drum. It is probable that the linings are worn when
the actuator travel has increased significantly.
Check the thickness of the brake shoe linings
(minimum allowable 5 mm). The brake shoes should
be replaced as soon as the minimum lining thickness
is reached.
Check that the brakes are clean. Clean them if
necessary. Do not clean with compressed air as it
contains small amounts of oil.
Lubricate brake cam shaft bearings lightly with grease
to avoid grease deposits forming on the brake linings
and drums.
FIXED LEVER BRAKE ADJUSTMENT
Take up the slack when the actuator stroke reaches
about two thirds of the maximum travel. To take
up the slack, turn the lever by one or more splines,
ensuring that the brakes are not touching when
released (to prevent overheating the brakes).
102 - Chapter 10 - Lubrication & Maintenance
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Never change the linkage position for the actuator
on the lever without authorization from the
vehicle manufacturer as the vehicle will have been
tested with the actuator at this position (the brake
operating levers have several holes, always use the
original hole).
For braking systems with a yoke, the yoke must
remain parallel with the axle especially when the
brakes are fully applied. This means that the stroke
of the levers on the brakes at each side must be
identical.
ADJUSTABLE LEVER BRAKE ADJUSTMENT
Take up the slack when the actuator stroke reaches
about two thirds of the maximum stroke. To take up
the slack, turn the adjustment screw on the lever to
adjust the relative position of the cam and the lever.
The actuator brakes by pushing the lever to turn it
in a particular direction. The screw must be adjusted
so that the cam moves in this direction to take up
the slack.
The direction in which the screw must be turned
depends on the configuration.
Ensure that the brake shoes are not contacting the
hub when released to prevent overheating and
wearing out the brakes prematurely during normal
operation.
Never change the linkage position for the actuator
on the lever without authorization from the
vehicle manufacturer as the vehicle will have been
tested with the actuator at this position. The brake
operating levers have several holes; always use the
original hole.
SEASONALLY
Clean wheel bearings, inspect, re-grease and set
bearing pre-load:
If the axle bearings have become worn or damaged
and need replacing, the following procedure should
be followed. Remove the wheel as per instructions.
Remove the bolts from the bearing dust cap and
clean out as much grease as possible.
Remove the split pin and castle nut and washer.
Slide the outer bearing and hub off the axle. Bearing
puller may be required. Remove the inner bearing.
Remove the seal too if it is to be replaced during this
service.
Prairie Pro Operator's Manual MY19 - REV 2
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