36
f. Wash clean all the pipelines of the hydraulic steering gears, strictly prevent them from
any contamination while assembling or dismounting them for replacement. The filtration
fineness of the filter should be better than 30 µ. The hydraulic oil should be renewed
periodically.
g.
The oil temperature of the Full hydraulic steering system is to be kept within the range of
-20ºC
~
+ 80ºC, but the normal working temperature of the hydraulic oil should be
30ºC
~
+ 60ºC.
Fig. 9 Structure of the Full hydraulic steering gear
1. Front cover 2. Leaf spring Thrust bearing 3. Pin 4. Valve body
5. Valve bush 6. Valve element 7. Linkage shaft 8. Isolation plate
9. Stator 10. Rotor 11. Rear cover
5.5
Adjustment of the Disc brake
I
After working for a period of time. The wear and tear of the brake discs enlarges the gaps between
brake discs and inner end face of the brake housing and the inner end face of the brake cover as well,
which affects the brake performance considerably. Excessive free travel of the brake pedal will even
cause the brake ineffective. So the brake should be inspected and adjusted regularly to ensure the
safety of the tractor while in traveling.
No matter the tractor is new or old , the adjustment should be done in time whenever one of the
following brake faults appears:
a. The brake is ineffective due to excessive free travel of brake pedals;
b. The free travel of the brake pedals is too much little and the brakes are kept in semi-braking status all
the time, which makes the brake housing become hot and further quicken the wear and tear of the
brake discs;
c. The braking force of left side and right side pedals is different, which causes the brake bias. Fig.
10shows the structure of disc brake that is consisted of the brake itself and the brake control
mechanism. The adjusting methods ar as follows:
Содержание DF254G2-6
Страница 65: ...65 for owner ...
Страница 66: ...66 for dealer ...
Страница 67: ...67 for manufacturer ...