Agrison HP ULTRA Series Operation Manual page 64

Park the tractor on level ground; lower lift arm to extreme lower position; stall engine; screw
off the oil dipstick with cover on lifter and inspect oil level; if oil level is below lower scale, inject oil
between upper and lower scales. When replacing hydraulic oil, dismount the plug and drain off
dirty oil; clean and then inject new engine oil as required.
4.2.2.16 Maintenance of fuel tank
Park the tractor on level ground and stall engine; dismount the oil drain plug under fuel tank
and drain off the deposits at the bottom of fuel tank. The fuel tank is used to store fuel and deposit
water and impurities, so it should be cleaned regularly in use to remove dirt.
4.2.2.17 Inspection of tire inflation pressure
The tire pressure is inspected by barometer and the tire inflation pressure is referred to
technical specifications for tractor. Extremely high or low tire pressure will reduce tire life and have
an adverse impact on travel control of tractor.
4.2.2.18 Maintenance of engine cooling system
Engine coolant may be boiled tap water or anti-freezing solution. The period of validity of
anti-freezing solution is two years or 1600h. When it is beyond the period of validity, anti-freezing
solution should be replaced and the cooling system should be cleaned; then new anti-freezing
solution is injected.
Precautions for use of radiator:

Before start, inspect whether cooling water in radiator has been filled up and whether
there is water leakage. Inspect whether radiator cover is fastened.

Irregularly inspect radiator core; if it is blocked by weed, dust or oil stain, the weed, dust
or oil stain should be removed.

Regularly remove incrustation scale in cooling system to guarantee heat dissipation of
heat exchange surface.

Regularly inspect thermostat performance to make it in good condition, or else it will
affect circulation of cooling water and reduce cooling effect.
Cleaning of cooling system:
Clean the exterior of radiator. Before cleaning, remove weeds and impurities; then wet the
core body with warm water (or steam); finally dry it with compressed air.
When the radiator is dismounted for cleaning, the detergent is applied and the radiator is
immersed in 1～2% water solution. The solution temperature is 80～100℃ and the radiator is
shaken continuously in solution to remove dirt easily; then the radiator is cleaned with clean water.
Removal of incrustation scale in cooling system: The shift prior to maintenance fills up cooling
system with solution prepared with 750g caustic soda and 150g kerosene in 10L water. The
engine runs 5～l 0min at medium speed and the solution stays l0～12h (attention should be paid
to heat preservation to prevent freezing); then restart engine and make it run 20min at medium
speed, and next stop engine and drain cleaning liquid. After the engine is cooled, insert water pipe
Maintenance Instructions
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