38
(from the highest position of the brake pedal to friction disc assembly being completely
braked) on the brake pedal is 25-35 mm. When the left and right pedals are locked
together, stepping on the pedal will simultaneously brake the left and right wheels.
After adjustment is completed, lock pull rod and fork with locking nut (2)(4).
c .Brake deviation motion adjustment
When left and right brake adjustment is identical and the tractor is running at high speed,
if the brake is applied as in an emergency, an identical tire print length should appear and
there should be no pulling motion to one side or the other. If this is not true then the
left and right brake are not matched. In such case, the brake-pulling rod should be
shortened on the side with the short print length of tire, or vice versa, in order to make
both rear wheels to brake simultaneously and reliably.
Adjustment of rear axle
In
order to assure the reliable working of main
drive, the spiral-bevel pinion and spiral crown
gear should be assembled with a mated pair and
adjusted to right position for reasonable engaging.
In operating, if normal engagement position is
disrupted due to bearing’s damage or other
reasons, it must be adjusted again after replacing
the damaged bearing with a new one or fixing up
other troubles. As to the assembling diagram of
the main drive, please refer to Fig. 12.
While assembling the spiral-bevel pinion and
the spiral crown gear, the pre-stress of the bearings in main drive has to be correctly
established first, and the meshing of the pinion and crown gear could be then adjusted.
As to the spiral bevel pinion, its pre-stress of bearings is to be adjusted by screwing
down the Locking nut (2). The torque to be applied for turning the spiral-bevel pinion
should be kept between 1.176
～
1.764 N. m. after the assembling is completed. If the
torque can’t be measured by a specific apparatus, then it must be adjusted by an
experienced people. After adjusting is made, the locking nut (4) must be tightened, and
the angles of check shim (3) should be pulled down into slots of the two lock nuts
respectively. The axial position of the spiral-bevel pinion is to be adjusted by adding or
deducting the adjusting shims (1), the pinion will goes forwards if the adjusting shims (1)
are added, the pinion will withdraw if the adjusting shims (1) are deducted.
Fig. 11 Diagram of meshing zone
