Makita DSC162 Manuel D'instructions page 11

TROUBLE SHOOTING
WARNING:
• Remove battery before working on machine.
PROBLEM
Cutter Rod will not
extend.
Insufficient power to cut
rebar.
Oil leaks.
Motor not moving.
Motor slow or erratic.
NOTE:
• The internal components of the pump and piston area have very close tolerances and are sensitive to damage from
dust, dirt, contamination of the hydraulic fluid or improper handling. The disassembly of the pump housing requires
special tools and training, and should only be attempted by qualified repair personnel that have been properly trained
and have the right tools. The improper servicing of electrical components can lead to conditions that could cause
serious injury. The pump, piston components and all electrical parts should be serviced only by authorized repair shop,
dealer or distributor.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and the
battery cartridge is removed before attempting to
perform inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
Replacing carbon brushes (Fig. 16)
Replace when they wear down to the limit mark. Keep the
carbon brushes clean and free to slip in the holders. Both
CAUSE
Insufficient oil
Cutter Rod has not returned completely due
to build up of debris between Cutter Rod and
Bar Holder.
Cutter Rod has not returned completely due
to damage to the Cutter Rod.
Cutter Rod has not returned completely due
to loose or damaged Blades.
Cutter Rod has not returned completely due
to weak Return spring.
Insufficient oil.
Return Valve not properly seated or seating
damaged.
Return Valve, damaged.
Incorrect clearance between Cylinder and
Piston.
Check Valve, not properly seated or seating
damaged.
Urethane packing, damaged or broken.
Oil leveller Bladder, damaged or broken.
Cutter Rod/ Bar Holder, O-Ring damaged;
Rod/Bar Holder, surface scratched or
grooved.
Cylinder/Bar Holder, O-Ring damaged
Cylinder/Pump Case, Gasket damaged.
Bar Cutter/Cylinder/Pump Case, flange bolts
loose.
Voltage incorrect.
Battery at end of working life.
DC Motor damaged by over-heating.
DC Motor bearings or gear damaged or
broken.
Top up oil. (Refer to "Adding Oil")
Manually push back Cutter Rod.
Remove debris and clean
Replace Cutter Rod.
Tighten Blade bolts.
Replace Blades
Replace Return spring.
Top up oil. (Refer to "Adding Oil")
Clean tip of Return Valve and Seating.
Remove any scratched from seating.
Replace.
Replace Piston (Note: different size pistons
available)
Clean Check Valve and seating.
Replace.
Replace.
Replace.
Replace Back-Up Ring and O-ring.
Replace Cutter Rod/Bar Holder
Replace O-ring.
Replace liner B.
Tighten bolts.
Charge Battery.
Replace Battery.
Replace DC Motor.
Replace bearings or gear.
carbon brushes should be replaced at the same time. Use
only identical carbon brushes.
Use a screwdriver to remove two screws then remove the
rear cover. (Fig. 17)
Raise the arm part of the spring and then place it in the
recessed part of the housing with a slotted bit screwdriver
of slender shaft or the like. (Fig. 18)
Use pliers to remove the carbon brush caps of the carbon
brushes. Take out the worn carbon brushes, insert the
new ones and replace the carbon brush caps in reverse.
(Fig. 19)
Make sure that the carbon brush caps have fit into the
holes in brush holders securely. (Fig. 20)
SOLUTION
11