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Pressure adjustment of main safety valve
Pressure adjustment of main safety valve
The main safety valve pressure is preadjusted at the factory should not be readjusted by the user
The main safety valve pressure is preadjusted at the factory should not be readjusted by the user
under normal conditions. The following example describes the adjustment method for a forklift
under normal conditions. The following example describes the adjustment method for a forklift
truck with a rated load of 1600 kg:
truck with a rated load of 1600 kg:
1.
1. Place a load
Place a load rated at 125
rated at 125% of the forklift's li
% of the forklift's lifting capa
fting capacity (i.e. a load
city (i.e. a load of 2000 kg) o
of 2000 kg) onto the
nto the
forks in a stable manner.
forks in a stable manner.
2.
2. Depress the acce
Depress the accelerator peda
lerator pedal fully
l fully, then operate the lift lev
, then operate the lift lever
er. If the forks can be lifted
. If the forks can be lifted
within a height range of 0
within a height range of 0
–
–
300 mm, the main safety valve pressure is correct. Otherwise
300 mm, the main safety valve pressure is correct. Otherwise
adjust according to step (3).
adjust according to step (3).
3.
3. If the forks cann
If the forks cannot lift the loa
ot lift the load off the gro
d off the ground, the pre
und, the pressure of the ma
ssure of the main safety valve
in safety valve needs
needs
to be increased. To do this, remove the front floorplate, slacken off the main safety valve
to be increased. To do this, remove the front floorplate, slacken off the main safety valve
lock nut, then turn the adjusting screw clockwise to increase the pressure of the main
lock nut, then turn the adjusting screw clockwise to increase the pressure of the main
safety valve. If the forks can be lifted above 300 mm, turn the adjusting screw
safety valve. If the forks can be lifted above 300 mm, turn the adjusting screw
anticlockwise to reduce the pressure of the main safety valve.
anticlockwise to reduce the pressure of the main safety valve.
4.
4. Depress the ac
Depress the accelerator peda
celerator pedal fully and make sur
l fully and make sure that the forks are ab
e that the forks are able to lift within
le to lift within a
a
height range of 0
height range of 0
–
–
300 mm. If this is not the case, adjust according to step (3) until the
300 mm. If this is not the case, adjust according to step (3) until the
pressure meets the required lifting height range.
pressure meets the required lifting height range.
Warning: the load must be placed stably and securely; once the pressure has been adjusted, it
Warning: the load must be placed stably and securely; once the pressure has been adjusted, it
should not be readjusted unnecessarily.
should not be readjusted unnecessarily.
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