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Makita HTR 4901 Manual

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14
Checking the spark plug - Every 8 hours (Daily)
፴፧ Only use the supplied universal wrench to remove or to install the spark plug.
፴፧ The gap between the two electrodes of the spark plug should be 0.6 to
0.7mm. If the gap is too wide or too narrow, adjust it. If the spark plug is
clogged with carbon or fouled, clean it thoroughly or replace it. Use an exact
replacement.
Supply of grease and lubricant
፴፧ Supply grease from the grease nipple every 20 operating hours. (Shell
Alvania No.2 or equivalent)
NOTE: Be sure to observe the specified time and amount of grease supply.
If the grease supply is not made at the specified interval or if the
amount of grease supplied is not sufficient, the machine may fall into a
trouble because of lack of grease.
Suction head in the fuel tank
፴፧ The felt filter (1) of the suction head is used to filter the fuel required by the
carburetor.
፴፧ A periodical visual inspection of the felt filter is to be conducted.
፴፧ For that purpose, open the tank cap, use a wire hook and pull out the suction
head through the tank opening.
Filters found to have hardened, been polluted or clogged up are to be
replaced.
፴፧ Insufficient fuel supply can result in the admissible maximum speed being
exceeded. It is therefore important to replace the felt filter at least quarterly
to ensure satisfactory fuel supply to the carburetor.
Cleaning of muffler exhaust port
፴፧ Check of muffler exhaust port (2) regularly.
፴፧ If it is clogged by carbon deposits, carefully scratch the deposits out with a
suitable tool.
Do not allow carbon to fall into engine ports.
Any maintenance or adjustment work that is not included and described in this manual is to be performed by Authorized Service Agent only.
Daily checkup and maintenance
To ensure a long service life and to avoid any damage to the equipment, the following servicing operations should be performed at regular
intervals.
፴፧ Before operation, check the machine for loose screws or missing parts. Pay particular attention to the tightness of the cutter blade screws.
፴፧ Before operation, always check for clogging of the cooling air passage and the cylinder fins. Clean them if necessary.
፴፧ Perform the following work daily after use:
Clean the Hedge Trimmer externally and inspect for damage.
Clean the air filter. When working under extremely dusty conditions, clean the filter several times a day.
Check the blades for damage and make sure they are firmly mounted.
Grease nipple
Grease will come out from here.
(1)
(2)
… 14 …


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