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4. MAINTENANCE
4.1 GENERAL MAINTENANCE SCHEDULE
!
WARNING! All maintenance work is carried out when the engine is stopped. If the engine
must run, ensure that the working area is well ventilated. Exhaust gases contain carbon
monoxide; exposure to this toxic gas can cause loss of consciousness and can be fatal.
!
WARNING! If the engine has just been running, the muffler will be very hot, take care not
to touch it.
"
Ensure the spark plug HT lead has been disconnected prior to commencing maintenance.
"
The oil, air filter and spark plug must be changed regularly. All other maintenance must be
carried out by qualified staff, contact your local Sealey service agent.
Maintenance period
Operations to be performed at
whichever comes first (months or hours)
Drain and renew the engine oil
Clean the air filter
Clean the carburettor sediment cup
Clean and check the spark plug
Check and adjust the valve clearance
Clean the fuel tank
Check or replace the fuel line
Clean the generating set
Note: 1 Service more often if used in dusty environments.
2 These services must be carried out by an authorised Servicing Agent.
4.2. CHANGING THE ENGINE OIL - Fig.4.
!
WARNING! Exposing the skin for long periods and repeatedly to used engine oil can
cause cancer. It is obvious that the risk is relatively low unless oil is handled every
day and for a long period of time. However, it is recommended to carefully wash
hands immediately after handling dirty oil.
4.2.1. Drain the engine oil when the engine is warm to ensure quick and complete drainage.
4.2.2. Place a suitable container below the sump, remove the oil filler cap, the oil drain plug
and let the oil drain completely.
4.2.3. Refit the oil drain plug and tighten fully.
4.2.4. Fill the sump with new approved oil, through the filler hole, up to the dipstick upper level.
4.2.5. Refit the oil filler cap.
4.3.
MAINTAINING THE AIR FILTER
For Model Nos: HG55.28.V3 and HG65.30.V2 refer to Fig.5.
For Model Nos: HG90.44.V2 and HG130.74.V3 refer to Fig.6.
!
WARNING! Never use fuel or solvent to clean the foam element. This can cause a fire
or an explosion.
Note: If the air filter is dirty, air passing towards the carburettor will be restricted. To avoid the
carburettor malfunctioning, clean the air filter regularly. Clean more often when the
engine is used in extremely dusty places.
4.3.1. Unscrew the wing nut and remove the air filter cover.
4.3.2. Unscrew the second wing nut, lift off the two elements and separate them.
4.3.3. Carefully check both elements for tears or holes and replace if damaged.
4.3.4. Lightly tap the paper element several times on a hard surface to remove the dirt, or clean it
using compressed air blowing from the inside to the outside of the paper filter. Replace the
paper element if it is very dirty.
Note: Never attempt to remove dirt with a brush as brushing could imbed the dirt into the fibres.
4.3.5. Wash the foam element in household detergent diluted in warm water, rinse with plenty of
water and dry thoroughly.
4.3.6.Dip the foam element into some clean engine oil and press out to remove any excess oil.
Note: The engine will start smoking during the first start up if too much oil is left on the foam.
4.3.7.The refitting procedure is the reverse of the above.
4.4.
CLEANING THE SEDIMENT CUP - Fig.7.
4.4.1. Close the fuel valve, fig.2.
4.4.2. Remove the sediment cup and the 'O' ring by unscrewing the bolt at the bottom of the cup.
4.4.3. Wash the sediment cup and 'O' ring with a non flammable high flash point solvent.
4.4.4. Dry thoroughly and refit ensuring the bolt is fully tightened.
4.4.5. Open the fuel valve and check for leaks.
4.5. MAINTAINING THE SPARK PLUG
! WARNING! If the engine has just been running, the muffler will be very hot, take care not to touch it.
! WARNING! The spark plug must be correctly tightened. If the plug is not well tightened, it can overheat and damage the engine.
Note: To ensure that the engine performs correctly, the spark plug must not have any deposits on it and its gap must be correct.
4.5.1. Remove the spark plug cap and the spark plug using a spark plug wrench.
4.5.2. Inspect the spark plug and discard it if the electrodes are worn or if the porcelain is cracked or scaled. If the spark plug is to be re-
used, clean with a wire brush.
4.5.3. Measure the electrode gap using a feeler gauge. The gap must be between 0.7mm and 0.8mm. Adjustment of the gap is
achieved by bending the side electrode.
First month Every 3
Every 6
or every
months or months or
20 hours
50 hour
100 hours
•
•
•
(1)
•
•
Every 2 years
•
Every
year or
300 hours
•
(2)
•
(2)
HG55.28.V3, HG65.30.V2, HG90.44.V2, HG130.74.V3. - 1 - 160307
Fig.4.
Fig.5.
AIR FILTER
COVER
WING NUT
PAPER ELEMENT
FOAM ELEMENT
Fig.6.
O-RING
Fig.7.
SEDIMENT CUP
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