Maintenance; Troubleshooting - Makita BC300LD Instruction Manual

keep control of the tool could result in serious injury to
the bystander and the operator.
Adjustment of the hanger position and shoulder
harness
When replacing an accessory with another, the weight
balance of the tool may change. In such case, adjust the
hanger position and shoulder harness length as follows.
To change the hanger position, loosen the fixing screw on
the hanger with the supplied wrench and then move the
hanger.
Adjust the hanger position and shoulder harness length
so that:
- the hanger positions 750 mm or higher from the
ground,
- the cutting tool positions up to 300 mm high from the
ground and
- the unguarded part of cutting tool is horizontally
750 mm or farther away from the hanger. (Fig. 36)
After adjusting the hanger position, tighten the screw with
the wrench securely.

MAINTENANCE

WARNING:
• Always be sure that the tool is switched off and
battery cartridge is removed before attempting to
perform inspection or maintenance on the tool.
Failure to switch off and remove the battery cartridge
may result in serious personal injury from accidental
start-up.
NOTICE:
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
Supply of grease to gear case (Fig. 37)
Supply grease (Shell Alvania 2 or equivalent) to the gear
case through the grease hole every 30 hours. (Genuine
Makita grease may be purchased from your Makita
dealer.)
Replacing the nylon cord
WARNING:
• Always be sure that the tool is switched off and
battery cartridge is removed before attempting to
Malfunction status
Motor does not run.
Motor stops running after a little use.
16
• Make sure that the cover of the nylon cutting head
Press inward on the housing latches and lift upward to
remove the cover. Discard any of the remaining nylon
cord. (Fig. 39)
Hook the middle of the new nylon cord to the notch
located at the center of the spool between the 2 channels
provided for the nylon cord. One side of the cord should
be about 80mm longer than the other side.
Wind both ends firmly around the spool in the direction
marked on the head for left hand direction indicated by
LH. (Fig. 40)
Wind all but about 100 mm of the cords, leaving the ends
temporarily hooked through a notch on the side of the
spool. (Fig. 41)
Mount the spool in the housing so that the grooves and
protrusions on the spool match up with those in the
housing. Keep the side with letters on the spool visible on
the top. Now, unhook the ends of the cord from their
temporary position and feed the cords through the eyelets
to come out of the housing. (Fig. 42)
Align the protrusion on the underside of the cover with the
slots of the eyelets. Then push cover firmly onto the
housing to secure it. Make sure the latches fully spread in
the cover.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.
TROUBLE SHOOTING
Before asking for repairs, conduct your own inspection
first. If you find a problem that is not explained in the
manual, do not attempt to dismantle the tool. Instead, ask
Makita Authorized Service Centers, always using Makita
replacement parts for repairs.
Cause
Battery cartridge is not installed.
Battery problem (under voltage)
The drive system does not work
correctly.
Rotation is reverse.
Battery's charge level is low.
Overheating.
perform inspection or maintenance on the tool.
Failure to switch off and remove the battery cartridge
may result in serious personal injury from accidental
start-up.
is secured to the housing properly as described
below. Failure to properly secure the cover may cause
the nylon cutting head to fly apart resulting in serious
personal injury. (Fig. 38)
Install the battery cartridge.
Recharge the battery. If recharging is
not effective, replace battery.
Ask your local authorized service
center for repair.
Change the direction of rotation with
the reversing switch.
Recharge the battery. If recharging is
not effective, replace battery.
Stop using of tool to allow it to cool
down.
Action