Rev. 14.10.2020
20
21
Rev. 14.10.2020
Regular service interval - whichever comes
first
After each
use
In the first
month or after
20 hours of
operation
Every 3
months or
after every
50 hours of
operation
Every 6
months or
100 hours of
operation
Every year or
300 hours of
operation
Component
Engine oil
Level check
√
Replacement
√
√
Air filter
Check
√
Cleaning
√ [1]
Replacement
√
Sedimentation
filter
Cleaning
√
Spark plug
Check/Cleaning
√
Replacement
√
Idle speed
Cleaning, possibly
adjustment
√
Valve clearances
Cleaning - possibly
adjustment
√
Fuel tank with
strainer
Cleaning
√
Combustion
chamber
Every 300 hours of operation [2]
Fuel lines
Every 2 years (if needed replace) [2]
[1] – when working in a dusty environment, more frequent service intervals are recommended
[2] – required specialized tools and knowledge - recommended to be commissioned by a professional service
Valve clearance (cold): intake valve 0.15 ± 0.02mm/exhaust valve 0.20 ± 0.02mm
3.4.1 MAINTENANCE INTERVALS
A. Air filter replacement
The engine of the machine is equipped with a
2-element air filter consisting of a sponge filter and a
paper filter (see the picture below).
To get to the air filter, unscrew the wing screw on the top of
the filter case and remove the case. Then, unscrew another
wing screw to disassemble the 2-element filter. After
removing the filter, remove the sponge element. Check the
condition of both filters, decide whether they need to be
replaced (see maintenance interval table), or whether they
can be reused after cleaning. If the filters are reusable:
•
Paper filter - shake off loose debris, then blow using
compressed air (pressure not greater than 2 Bar/207
kPa/30 psi) from the outlet side, i.e. the side where the
engine sucks the filtered air into the carburettor.
PLEASE NOTE: never wipe the filter with a brush
because it causes debris to penetrate the filter
structure!
•
Sponge filter - soak in warm water with the addition
of grey soap, then rinse under running water and
allow to dry completely (alternatively, you can soak
the sponge filter in non-flammable solvent and allow
it to dry completely.) Dip the clean and completely
dry filter in fresh engine oil ( the same type as the
machine engine) and, after removing it, squeeze out
excess oil well, otherwise it will disturb the operation
of the engine - it will exude smoke.
Before installing a clean filter, use a damp, lint-free
cloth to wipe the case and the base of the filter case,
making that no dirt or water gets into the carburettor
air ducts. Then, place the sponge filter onto the paper
filter and install it in the reverse order of disassembly,
remembering about the gasket under the filter.
Tighten both the filter and its case securely with a
wing screw.
A. Sedimentation filter
B.
Gasket
A.
Replacing the spark plug
PLEASE NOTE: when you remove the spark plug, the
engine must be turned off and cold! Tightening it too
lightly/too much, or the wrong type of spark plug, or
a break in the electrode can damage the engine!
Turn the ignition switch to OFF. Remove the ignition
cable cap from the spark plug. Remove the spark plug
from the engine. Check the condition of the spark
plug - in the case of a burnt-out electrode, cracked
or chipped insulation (ceramics), it must be replaced.
When the spark plug is fit for further use, check the
electrode gap before putting it back and adjust if
necessary, the same with a new plug. The re-used
spark plug should be screwed in by tightening 1/8-
1/4 turn of the key, and a new plug by ½ turn.
B.
Idle speed control
PLEASE NOTE: the machine has a factory set idle
speed, and the speed should not be changed!
Idle speed adjustment is performed only in case of
engine or engine components repair, which requires
specialized tools.
Start the engine and allow it to warm up to the
operating temperature. Then, set the throttle lever to
the slowest speed and adjust the idle speed with the
throttle lock screw (see the picture below). Their value
should be 1800 ± 50 revolutions per minute.
A. Air filter cover
B.
Paper air filter
C. Sponge air filter
D. Gasket
B.
Cleaning the sedimentation filter
CAUTION: Perform this procedure on a cold engine!
Close the fuel supply valve and dismantle the
sedimentation filter and its gasket. Wash both parts
in non-flammable solvent, then dry them. When dry,
place the gasket on the fuel valve and tighten the
sedimentation filter again. Open the fuel supply valve
and check for fuel leaks around the filter - if there are
any, remove the filter and replace the gasket.
A
B
C
D
A
B
EN
EN
