6.3.2 Setting pressure of the relief valve
The pressure of the relief valve has been set before delivery. Don’t adjust the
pressure at will, for it will bring danger for system and safety. If the oil pressure is different
with standard value, according to the measure method specified in JB/T3300, specialized
servicemen adjust the pressure 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 mismatches with the lift capacity of the forklift truck, loosen
the lock nut of the overflow valve, screw 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.
Fig. 6.4 Setting pressure of the relief valve
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