DTSL3/FR MKII USER’S MANUAL
18
Chapter
Chapter
Chapter
Chapter 6
6
6
6 OPERATION
OPERATION
OPERATION
OPERATION
Down oil loop valve immediately.
The process of manual operation:
-Switch off the power button (avoid abruptly incoming electricity).
Open the small round cover of control box to find the electromagnetic valve A for lowering.
-Loosen manual oil loop stud at the end of lowering electromagnetic descent valve core,
And then the platforms begin to descend.
-After the machine has been descended, screw down descent valve’s stud timely. The process of manual lowering comes to the end.
Chapter
Chapter
Chapter
Chapter 7
7
7
7 MAINTENANCE
MAINTENANCE
MAINTENANCE
MAINTENANCE AND
AND
AND
AND CARE
CARE
CARE
CARE
S
killed
killed
killed
killed personnel
personnel
personnel
personnel only
only
only
only are
are
are
are allowed
allowed
allowed
allowed to
to
to
to perform
perform
perform
perform the
the
the
the operations.
operations.
operations.
operations.
-All bearings and hinges on this machine must be lubricated once a week by using an oilier.
-The upper and lower sliding blocks and other movable parts must be lubricated once o month.
-The hydraulic oil must be replaced one time each year. The oil level should always be kept at upper limit position.
The machine should be lower to the lowest position when replace hydraulic oil, then let the old oil out, and should be filtering the
hydraulic oil.
-Each team checks the agility and reliability of pneumatic safety equipment.
Chapter
Chapter
Chapter
Chapter 8
8
8
8 TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING
Skilled personnel only are allowed to perform the operations.
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
Symptom
Symptom
Symptom
Symptom
Cause
Cause
Cause
Cause
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
The motor does not
run in lifting
operation.
①
Connection of power supply wires is
not correct.
Check and correct wire connection
②
The AC contactor in the circuit of
the motor does not pick up.
If the motor operates when forcing the contactor down with an
isolation rod, check the control circuit. If the voltage at two ends of
the contactor coil is normal, replace the contactor.
③
The limit switch is not closed.
Check the limit switch, wires and adjust or replace the limit switch.
In lifting operation,
the motor runs, but
there is no lifting
movement
①
The motor turns reverse.
Change the phases of the power supply wires.
②
Lifting with light load is normal but
no lifting with heavy load.
The set safe pressure of the over-flow valve may be increased by
turning the set knob right ward slightly.
The spool of the lowering solenoid valve is stuck by dirt. Clean the
spool.
③
The amount of hydraulic oil is not
enough.
Add hydraulic oil.
④
The descent valve is energized but
does not work.
Check the plug and coil of the descent valve and check the right turn
tightness of its end copper nut and so on.
⑤
The “antiknock valve” is blocked.
Remove the “antiknock valve” from the oil supply hole at the
bottom of the oil cylinder, and clean the “antiknock valve”.
The machine lowers
extremely
slowly
under normal loads.
①
The hydraulic oil has too high
viscosity or frozen, deteriorated (in
Winter).
Replace with hydraulic oil in accordance with the instruction book.
②
The “antiknock valve” for
preventing oil pipe burst is blocked.
Remove the “antiknock valve” from the oil supply hole at the
bottom of the oil cylinder, and clean the “antiknock valve”.
The right and left
platforms are not
synchronous and not
in the same height.
①
The air in the oil cylinder is not vent
completely.
Refer to “
Ⅶ
. Oil Make-up ‘Adjust’ Operation”.
②
Oil leakage on oil pipe or at its
connections.
Tighten oil pipe connections or replace oil seals and then make-up
oil and adjust levelness.
Noisy lifting and
lowering.
①
Lubrication is not enough.
Lubricate all hinges and motion parts (including piston rod) with
machine oil
②
The base or the machine is twisted.
Adjust again the levelness of the machine, and fill or pad the base.
Table 2
