Maintenance Schedule; Mower Maintenance; Carburettor Adjustments; Oil Service - Hayter Harrier 48/56 BBC 493F Owner's Handbook Manual

MAINTENANCE SCHEDULE / MOWER MAINTENANCE

Maintenance Schedule

Follow the hourly or calendar intervals, whichever occurs
first. More frequent service will be required if working for
prolonged periods under dusty, dry conditions, or when
airborne debris is present or after extensive operation
cutting tall, dry grass.
First 5 Hours
- After the very first five hours change the engine oil
- Adjust the autodrive clutch cable
Daily
- Check the oil level
- Remove grass debris from around the engine, exhaust/
exhaust guard, air ways in the top cowl, underside of
the deck housing and from the grassbag and check for
signs of damage.
- Check the condition of guards and safety devices.
- Check condition of cutterblade.
25 Hours Or Every Season
- Change the engine oil if continuously operating under
heavy load or high ambient temperature.
- Service the air cleaner.
- Lubricate wheels, pivot points and linkages and grease
the inner control cables at point of entry and exit from
Fig. 22
1. Air Cleaner
2. Fuel Cap
3
2
4
3. Start Grip
1 5
4. Cover
5. Oil fill/Dipstick
6. Exhaust Guard
7. Exhaust
9
6 8. Spark Plug / Lead
8
9. Carburettor
7
their outer casing.
- Check the clutch cable adjustment.
- Sharpen the cutterblade.
50 Hours Or Every Season
Change the engine oil.
100 Hours Or Every Season
- Clean the engine cooling system. Clean more often
under dusty conditions or when airborne debris is
present or after prolonged operation whilst cutting tall,
dry grass.
- Replace the spark plug.
Engine Detail
(Refer fig.22)

Carburettor Adjustments

Should only be made by an authorised Briggs & Stratton
dealer. Under no circumstances should the engine be
adjusted to run at a speed in excess of that shown on the
Declaration of Conformity.

Oil Service

Check the oil level daily before starting the engine and
ensure that the correct oil level is maintained. Refer to-
'Before Starting the Mower' for oil checking and filling
instructions.
Fig. 23 Fig. 24
3
1
2
10
Change the engine oil after the first 5 hours of operation
and thereafter according to the 'Maintenance Schedule':-
1. Drain fuel by running the engine until the fuel tank is
empty.
2. Remove the spark plug lead.
3. Allow the engine to cool.
4. Drain the oil while the engine is warm (not hot)
5. Tip the mower over on to its left hand side thus
ensuring that the air cleaner is kept uppermost to
prevent engine damage.
6. Remove the oil filler dipstick and drain the oil into a
suitable container.
7. Refill with new oil of the recommended SAE viscos-
ity grade. (Refer to-'Before Starting the Mower')
(Refer fig.23)

Air Cleaner Service

To service the air cleaner, loosen screw (1) and remove
cover (2). (Refer fig.24)
Remove cartridge (3) and clean by tapping gently on a
flat surface. If very dirty, replace.
- Do not use petroleum solvents.
- Do not use pressurised air.
- Do not oil the cartridge.
After servicing, install the cartridge into the cover. Insert
the tabs on the bottom of the cover into the slots in the
bottom of the base (4). Tilt the cover upwards and se-
4