504G3 SERIES TRACTOR OPERATION MANUAL
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The free path of the brake pedal is between 80 and 85mm. During the usage, as the
driven disk abrading, the free path exceeds the regular range, even influence braking, so
it must be adjusted.
6.3.1Adjustmentofservicebrakingsystem
Before regulating, disconnect the connect plate, and adjust the free path of every pedal.
As Fig.6-2 shows, adjust piece 1 and 2 or (with) piece 3 and 4. Here gives the way of
how to adjust piece 1 and 2 as follows.
At first, bring down the split pin and shaft, then screw the nut 1, rotating the pull rod
head part A to regulate the length of the pull rod, so make the free path of every pedal
be about the same and between 80 and 85mm, after that, fasten the nut.
After adjusting the pedal, the tractor must be test at the highest speed on the dry flat,
and then try to brake urgently. After that, check the tire print lengths. Make sure the
diffence between left one and right one doesn’t exceed 400mm. If it fails to reach the
request, adjust again.
6.3.2Adjustmentofparkingbrakingsystem
Before regulating, bring down the split pin and shaft,then screw the nut 5 or 6,making
the clevis of flexible line fit with the brake rocker hole, and then fasten the nuts.
After adjusting the flexible line,the tractor must immovable on the ramp when using the
parking braking system.If the tractor have a remotion,it’s must be adjusted again
6.4 Adjustment of the Chassis
In order to ensure the reliable of the main drive, the spiral bevel pinion and the spiral
crown gear should be a matched pair when assembling, at the same time, they should be
adjusted correctly to approach the right meshing zone. The position must be adjusted
when the gears or the bearings are abraded.
6.4.1 Adjustment of the pre-stress of the spiral bevel pinion bearings
The two bearings 2 and 5 on the shaft should be pre-stressed (Fig.6-3). The pressure is
adjusted by screw the locking nut 1. It has been adjusted to the proper pressure by the
factory, and will not be adjusted again only when the bearings 2 and 5 should be
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