65
65
adjusted by adjusting the screw K.
adjusted by adjusting the screw K.
V
Valve L is a balance spool valve, and
alve L is a balance spool valve, and may move right or
may move right or left according to the variety
left according to the variety
of the oil fl
of the oil flow and pressure passing through it to change the opening of chamber R and S
ow and pressure passing through it to change the opening of chamber R and S
and ensures the oil flow to working chamber Q and to power steering port PS keeps in
and ensures the oil flow to working chamber Q and to power steering port PS keeps in
balance condition and is smoothly divided in certain proportion. Hole a is a fixed throttle
balance condition and is smoothly divided in certain proportion. Hole a is a fixed throttle
hole.
hole.
Fig6.3 Relief valve and flow divider
Fig6.3 Relief valve and flow divider
6.3.2 Setting pressure of the relief valve
6.3.2 Setting pressure of the relief valve
The pressure o
The pressure o
f the relief valve has been set before delivery. Don’t adjust the
f the relief valve has been set before delivery. Don’t adjust the
pressure at will, for it will
pressure at will, for it will bring danger for system and safety
bring danger for system and safety. If the oil pressure i
. If the oil pressure is different
s different
with standard value, according to
with standard value, according to the measure method specified
the measure method specified in JB/T3300, specialized
in JB/T3300, specialized
servicemen adjust the pressure as follows:
servicemen adjust the pressure as follows:
(a) Screw out the measured hole plug from the inlet port of control valve and install
(a) Screw out the measured hole plug from the inlet port of control valve and install
the oil-pressure gauge (20MPa) on it.
the oil-pressure gauge (20MPa) on it.
(b) Operate the tilt
(b) Operate the tilt lever
lever, measure the pressure when the stroke is
, measure the pressure when the stroke is to the bottom.
to the bottom.
(c) When the oil pressure mismatches with the lift capacity of the forklift truck, loosen
(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
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
specified value. Turn the screw left when pressure is high, and turn right when it is l
when it is low
ow..
(d) After having adjusted, tighten up the lock nut.
(d) After having adjusted, tighten up the lock nut.
https://www.besttruckmanuals.com/
