Tensioning The Saw Chain; Checking Chain Tension; Chain Lubricant; Filling Chain Oil Tank - Okay BHE 3020 Manuel D'utilisation

5 Now turn tensioning screw (1) clockwise until there is
very little chain sag on the underside of the bar – and
the drive link tangs are located in the bar groove.
6 Refit the sprocket cover and screw on the nut only fin-
gertight.

Tensioning the Saw Chain

Retensioning during cutting work:
• Shut off the engine and then slacken the nut.
• Hold the bar nose up.
• Use screwdriver to turn the tensioning screw (1) clock-
wise until chain fits snugly against the underside of
the bar.
Tighten down the nut firmly.
A new chain has to be retensioned more often than one
that has been in use for some time – check chain ten-
sion frequently – see chapter „Operating
/ During Operation".
• Check chain tension.

Checking Chain Tension

• Shut down the engine.
• Wear work gloves to protect hands.
• Chain must fit snugly against the underside of the bar
and it must still be possible to pull the chain along the
bar by hand.
• If necessary, retension the chain.

Chain Lubricant

For automatic and reliable lubrication of the chain
and guide bar – use only an environmentally
compatible quality chain and bar lubricant with
non-fling additive is recommended.
The service life of the chain and guide bar depends on
the quality of the lubricant. It is therefore essential to
use only a specially formulated chain lubricant. If special
chain lubricant is not available, you may – in an emergen-
cy – use an HD single grade or multigrade engine oil with
a viscosity that suits the prevailing outside temperature.
Do not use waste oil!
Medical studies have shown that renewed contact
with waste oil can cause skin cancer. Moreover,
waste is environmentally harmful!
Waste oil does not have the necessary lubricating
properties and is unsuitable for chain lubrication.

Filling Chain Oil Tank

• A full chain oil tank is sufficient for only half a tankful of
fuel. Check the oil level regularly during cutting work.
Never allow the oil tank to run dry!
• Thoroughly clean the filler cap and area around it so
that no dirt can fall into the tank.
Instructions
• Position the unit so that the filler cap faces up.
If the oil level in the tank does not go down, the reason
may be a problem in the oil supply system: Check chain
lubrication, clean the oilways, contact your servicing deal-
er for assistance if necessary.

Checking Chain Lubrication

The saw chain must always throw off a small amount of
oil.
• Always check chain lubrication and the oil level in the
tank before starting work.
Never operate your pruner without chain lubrica-
tion. If the chain is run dry, the whole cutting attach-
ment
short time.
Every new chain has to be broken in for about 2 to
3 minutes.
After breaking in the chain, check chain tension and
adjust if necessary – see chapter „Checking Chain
Tension".
GB-14
will be irretrievably damaged within a very