8
FEATURE OF THIS MACHINE
6.0 FEATURE OF THIS MACHINE
[1] OVERLOAD SWITCH AND CIRCUIT PROTECTOR (SWITCH)
This machine is equipped with a Circuit Protector and an overload switch to reduce the risk of damage of the Drill
Motor. The Circuit Protector trips when the Drill Motor is overloaded. Too much feeding pressure will cause the Circuit
Protector and overload switch to trip frequently. And frequent trip may lead to damage on the Drill Motor. Try to operate
so as not to make the Circuit Protector trip. When overload switch tripped the black button near the grip handle will pop
up. When circuit protector trips at rig-mounted mode, it will turn off the main switch. These devices are not reset until it
gets cool. If the overload switch does not stay in or if the main switch does not kept at ON position, wait a few minutes
and try again.
CAUTION!
Do not fit any Circuit Protector or Overload Switch of wrong specification that may cause damage of the
Drill Motor. Use only Circuit Protector of Shibuya’s genuine spare parts. Regarding the specification of the
Circuit Protector, refer to the spare parts list attached in the end of this manual.
CAUTION!
Make sure that core bit is not stuck before restarting from the trip of overload switch or circuit protector.
Otherwise, it may cause an injury or machine damage.
[2] CLUTCH SYSTEM
This machine has an Inner Clutch System to protect gear parts. If Core-Bit is suddenly jammed due to the presence of
piece of iron or similar materials, Spindle and gear parts are subject to severe shock. The Clutch System plays an
important role in such situations by relieving the shock. The Clutch System only operates if the gear parts are subject
to potentially damaging shock.
CAUTION!
The long time operation or operation at heavy-duty construction site would make the Clutch System
loose. If so, have it repaired by Shibuya’s authorized service center.
Do not try to tighten it by yourself.
[3] UNDER-VOLTAGE-DROPOUT
The built-in under voltage dropout in a main switch for rig fixed mode or under-voltage-dropout in the PRCD cuts off
the main power supply when voltage is dropped. The purpose of under-voltage-dropout is initially to avoid the
sudden restart after power failure, secondary to protect operator and machine from under-voltage-condition.
Under-voltage occurs under the following condition.
1) Power supply is insufficient.
2) Too long extension cable is used.
3) The size of extension cable core is insufficient.
4) Electric
leakage
CAUTION!
If you failed to start the drill motor, have the condition checked by qualified electrician before sending the
machine for repair.
[4] VARIABLE SPEED CONTROL TRIGGER
At hand held operation, you can adjust the spindle speed by depressing or releasing the trigger. The drill is designed
to generate its full power when the trigger is fully pressed. When you start drilling, you can run the Core-Bit very
slowly. As the Core-Bits segments going into concrete, you can increase the spindle speed gradually. And when you
get a kickback from the jamming Core-Bit, merely releasing the trigger can reduce the machine power.
CAUTION!
At the partial trigger-position, the machine does not generate its intended power. To adjust the peripheral
speed of core bit, please select suitable gear position.
