404G2 SERIES TRACTOR OPERATION MANUAL
79
④ The oil is too gummy
⑤ Ball valve is no of efect, and steer wheel
work heavily when steer quickly or
slowly, and steer powerlessly
⑥ Steer system leak include inside or
outside leak
⑦ Safety valve
a) Safety valve spring become weak
b) The valve is plugged up with dirt
c) The spring of the valve become weak
or the ball is ineffective
④ Replace
⑤ Check and fix
⑥ Checkup and eliminate
⑦ Clean and adjust
(3) Steering failed
① Poke pin broken or deformed
② Interlink shaft open end broken or
deformed
③ Rotor and interlink shaft position
misplace each other
④ Steering oil case piston is damaged
① Replace poke pin
② Replace interlink shaft
③ Reinstall
④ Replace
(4) The steering wheel can’t return back
① The steering shaft isn’t concentric with
the rotor
② The steering shaft push the rotor to
ineffective
③ The steering shaft isn’t concentric with
the steering column, steering moment is
too large
④ The return spring is broken
Checkup and eliminate
(5) Turn the steering wheel slowly，steering
force will be light， or it will be heavy
The flux of constant pump is too small Check and adjust
7.8 PTO
Troubles & possible causes Fixing methods
(1) PTO dosen’t work
① The button of PTO is broken
② There is something wrong with the circuit
③ The valve is broken
④ PTO hasn’t been put into gear
① Check the button
② Check the circuit
③ Replace
④ Put it into gear
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