Hayter Mowers 491G Lawn Mower User Manual


 
10 11
Friction Disc
The cutterblade is driven by the engine via a friction
disc to help prevent damage occurring to the engine
crankshaft and cutting mechanism when a hidden
obstruction or overload is encountered. (Refer g.18)
Always stop the engine when a hidden obstruction
or excessive vibration is encountered. Disconnect the
spark plug lead and examine the cutting mechanism.
ALWAYS replace a damaged cutterblade - Refer to
“Maintenance”.
Non Grassed Areas
When moving the mower across non-grassed areas, stop
the engine and set the mower to the maximum height of
cut to protect the cutting mechanism. (Refer g.19)
Maintenance Schedule
Follow the hourly or calendar intervals, whichever occurs
rst. 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 rst ve 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
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 g.20)
Fig. 18
OPERATING THE MOWER / MAINTENANCE SCHEDULE
Fig. 19 Fig. 20
1. Air Cleaner
2. Fuel Cap
3. Start Grip
4. Cover
5. Oil ll/Dipstick
6. Exhaust Guard
7. Exhaust
8. Spark Plug / Lead
9. Carburettor
7
1
8
9
6
5
3
4
2