Baoli CPDS15, Operation & Service Manual

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As you see in Fig.7-12, the mast lift up when you push the lift lever forward, the mast
fall down when you pull the lift lever backward. The mast tilt forward when you push the tilt
lever forward, the mast tilt backward when you pull the tilt lever backward.
(5) Setting pressure of the relief valve
The pressure of the relief valve has been set before delivery. Don’t adjust the press
ure
at will, for it will bring danger for system and safety. If the oil pressure is different with
standard value as the following form, according to the measure method specified in
JB/T3300, it can be adjusted by specified servicemen as follows:
(a) Screw out the measured hole plug from the inlet port of control valve and install the
oil-pressure gauge (20MPa) on it.
(b) Operate the tilt lever, measure the pressure when the stroke is to the bottom.
(c) When the oil pressure is different from the specified value, loosen the lock nut of
the surplus valve, adjust the adjusting screw left and right to achieve the specified value.
Turn the screw left when pressure is high, and turn right when it is low.
(d) After having adjusted, tighten up the lock nut.
Forklift truck 1.5t 1.8t
Main relief pressure 14.5MPa 16MPa
Steering unit pressure 8MPa 8MPa
Fig.7-13 Pressure adjusting of relief valve