Figure 6:
Positions of the safety ignition switch
V. HANDLING AND MAINTENANCE
Regular treatment of the engine is very important for its long service life and correct functioning. If you adhere to these
fundamental maintenance instructions, the engine will serve you long without any greater problems.
It is advisable to have records on fuel mixture consumption and time of engine operation. The information is a good
indicator of the technical condition of the engine.
Thorough cleaning of the engine is recommended after
50
hours of operation. However, if your engine works in dusty
environment and under high temperatures (such as at rotary cultivation or cutting), the intervals of engine cleaning
should be shorter. Particularly important is to check the oil air cleaner (see page 26), vicinity of the upper part of
cooling fan rotor and fuel cleaner. Should these places be soiled or clogged, the engine output is reduced and the wear
of parts increased.
Take care that the stalks of plants do not get between fan blades and cylinder and head lamination when cutting high-
grown swards. Insufficient engine cooling results in overheating and danger of engine seizure.
To clean the engine use only the “environment-friendly“ detergents !
Recommended Czech-made detergents are for example " ARVA - EKO " or " EKOLAN 93 ".
Clean the engine only when it is cold.
Proper engine operation needs correctly adjusted spark plugs. Spark plugs recommended for engines 1453 ISKRA,
1454 VAPE, and for engines 1447 VAPE DV CE, 1454 VAPE DV CE are
BRISK N17
(
BRISK N17 C
) and
BRISK
D17YC
respectively.
Spark plug should be cleaned with a wire brush after
50
hours of operation and the spark contact gap should be set to
0,6 - 0,7 mm
by using feeler gauges.
MAINTENANCE PLAN:
Interval
daily
monthly
3 months
6 months
once a year
Check, adjustment
20 hrs
50 hrs
100 hrs
300 hrs
Air cleaner
•
•
Fuel cleaner
•
•
Engine cooling
•
•
•
Spark plug
•
Fuel hose
to be replaced every three years
DIAGNOSTICS OF DEFECTS AND REMEDIAL ACTIONS
Problem:
Cold engine cannot be started:
Reason:
a) Defect in fuel piping
b) Spark plug does not spark
c) Blocked main carburetter jet
Rectification:
ad a) Make sure whether there is enough petrol in the tank,
check whether the fuel cock is open and fuel flows through the feeding hose. If not so, clean the fuel system completely.
