Spark Plug; Air Filter; Cutting Unit - RedMax CHT220 Manual De Instrucciones

9. Maintenance

■ SPARK PLUG

The spark plug condition is influenced by:
• Incorrect carburetor adjustment.
• An incorrect fuel mixture (too much or incorrect type of
oil).
• A dirty air filter.
These factors cause deposits on the spark plug electrodes,
which may result in operating problems and starting
difficulties.
If the machine is low on power, difficult to start or runs
poorly at idle speed: always check the spark plug first
before taking any further action. If the spark plug is dirty,
clean it and check that the electrode gap is 0,5 mm
(0,020"). The spark plug should be replaced after about a
month in operation or earlier if necessary.
CAUTION! Always use the recommended spark plug type!
Use of the wrong spark plug can damage the
piston/cylinder. Check that the spark plug is fitted with a
suppressor.

■ AIR FILTER

The air filter must be regularly cleaned to remove dust and
dirt in order to avoid:
• Carburetor malfunctions
• Starting problems
• Loss of engine power
• Unnecessary wear to engine parts
• Excessive fuel consumption.
Clean the filter every 25 hours, or more regularly if
conditions are exceptionally dusty.
Cleaning the air filter
Remove the air filter cover and take out the filter. Wash it
clean in warm, soapy water. Allow the filter to dry and then
oil it in according to the instructions.
An air filter that has been in use for a long time cannot be
cleaned completely. The filter must therefore be replaced
with a new one at regular intervals. A damaged air filter
must always be replaced.
■ GEAR
There is a plug for filling lubricant on the gear housing.
Use the grease tube to fill with grease and repeat every 25
hours. Use RedMax special grease.
CAUTION! The gear housing must not be filled completely
with grease. The grease expands as the machine heats up
during operation. If the gear housing was completely filled
with grease it could damage the seals and lead to leakage
of grease.
The grease in the bevel gear does not normally need to be
changed except if repairs are carried out.

■ CUTTING UNIT

Check that the cutting units' screws are fitted correctly.
Tighten them with a tightening torque of 7-10 Nm.
CHT220/CHT220L
U
S
US-15