Lovol TE304 - Trailer Air Brake Adjustment; Main Drive Adjustment

Maintenance Instruction
Caution:
The free travels should be the same for left and right brake pedals. Otherwise, in case of
emergency braking, the tractor will sharply deflect to one side, causing possible accidents.
5.4 Trailer air brake adjustment
(1) If the tractor transporting with trailer, the system pressure should not be less than 0.44MPa.Otherwise, you are
allowed to drive the tractor only raising the air pressure to set value.
(2)
Generally, the balance pressure in the air reservoir should not be less than 0.70MPa.Otherwise, please adjust the
air pressure regulator. When engine is stopped, if air pressure alarm gives the warning, it indicates there is any
leakage and troubleshoot.
(3)
Opening pressure of air reservoir relief valve is (0.75~0.8)MPa. Please timely adjust and demarcate the air
pressure during work.
(4) If the air pressure is always within (0.75~0.8)MPa or more, it indicates the relief valve will not relieve the
pressure. Please timely clean or replace the relief valve.
(5) After daily work is over, open the drain valve 14 to drain the deposited water in the air reservoir 15.
(6) If the tractor transporting with trailer, please check the whole braking system to ensure the trailer braking is
synchronizing with tractor braking or is slightly in advance rather than lag behind.The adjusting method is as
follows:.
Loosen the nut 10 and rotate the adjusting fork 11 to shorten the adjusting link 8 to bring forward the trailer braking
time.
Extend the adjusting link 8 to lag behind the trailer brake time.If necessary, this can be done by adjusting the
screw 7, then secure the lock nut 9,10.
Fig. 5-5 Trailer air brake system
1. Air compressor 2
. Outlet pipeline of compressor 3. Air pressure warning 4. Connection to barometer 5. Brake pedal 6. Short rocker
arm 7. Adjusting screw 8. Adjusting link 9. Lock nut 10. Nut 11. Adjusting fork 12. Relief valve 13. Air brake valve 14. Drain valve 15.
Air reservoir
Caution:
the trailer braking should be consistent with tractor braking or be slightly in advance. Otherwise,
the roller accident will occur.
5.5. Main drive adjustment
57