Hyundai 30EPER Operator's Manual page 30

Brake cannot work
Not release after
braked
Adjustment methods of safety valve pressure
The pressure of safety valves has already been
adjusted when the truck is ex-factory. Users shall
not adjust the pressure at will. Otherwise it will
bring danger to the truck's hydraulic system and
safety. If the oil pressure is not in accordance with
specified value, please ask the professional
personnel to adjust according to the test methods
stipulated in the JB/T3300 standards as well as the
following methods:
1 Screw out high pressure oil tube and install
pressure meter with capacity over 20Mpa at the
high pressure oil outlet.
2 Press lifting operation button to measure the
system pressure. The stipulated system pressure is
14Mpa for truck with rated load of 2500KG.
3 If oil pressure is not in accordance with the
specified value, please loosen locknuts of the
overflow valves. Turn pressure screw left and right
until the pressure reaches the specified value.
When the screw is turned clockwise, the system
pressure increases. While the screw is turned
counter-clockwise, the system pressure decreases.
4 After the adjustment, please screw down the locknuts
The friction plates of the electromagnetic
brake are damaged.
Inching switch is damaged or ineffective
connection.
Steering potentiometer is damaged or
loosened.
Malfunction of controller
The electromagnetic brake is out of
electricity.
The clearance of the electromagnetic brake
is too large.
Replace
Tighten it or replace it
Tighten or replace it after adjustment
Consult the maintenance personnel of
our company.
Check the circuit.
Adjust the brake clearance to 0.2mm.
Pressure adjusting screw
Locknut
27