Manual Alpina TB 250 JD (page 13 of 28) (All languages)

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• Petrol characteristics

Only use unleaded petrol with a fuel grade of at

least 90 N.O.

IMPORTANT

Unleaded petrol tends to cre-

ate deposits in the container if preserved for more

than 2 months. Always use fresh petrol!

• Oil characteristics

Only use top quality synthetic oil specically for

two-stroke engines.

Your dealer can provide you with oils which have

been specically developed for this type of en gine,

and which are capable of guaranteeing a high level

of protection.

The use of these oils makes it possible to prepare

a 2,5% mixture, consisting in 1 part oil to 40 parts

petrol.

• Preparation and preservation of the fuel

mixture

DANGER!

Petrol and the fuel mixture

are highly inammable!

CHECKING THE MACHINE

Before starting work please:

– check that all the screws on the machine and the

cutting device are tightly fastened;

– check that the cutting device is undamaged and

that the 3 or 4-point metal blades (if tted) are

properly sharpened;

– check that the air lter is clean;

– check that the protection devices are well fas-

tened and working eciently;

– check the handgrips are well fastened.

PREPARING THE FUEL

This machine is tted with a two-stroke engine

which requires a mixture of petrol and lubricating

oil.

IMPORTANT

Using petrol alone will da-

mage the motor and will cause for invalidation of

the warranty.

IMPORTANT

Only use quality fuels and

oils to maintain high performance and guarantee

the duration of the mechanical parts over time.

NOTE

The fastening nut (5) has a

left-hand thread and so must be unscrewed in a

clockwise direction and screwed up anticlockwise.

– Insert the wrench supplied (2) into the specic

hole in the angle transmission (3) and rotate the

blade (1) by hand until the wrench enters the

inner hole, blocking rotation.

– Unscrew the nut (4) clockwise.

– Take o the cap (5) and outer ring (6), then re-

move the blade (1), taking care not to take o

the inner ring (7) and spacer (8).

When mounting,

– If they were taken o during disassembly, ret

the spacer (8) and the inner ring (7), making

sure that the inner ring’s (7) grooves match per-

fectly with the angle transmission.

– Ret the blade (1) and the outer ring (6), with the

protruding edge toward the blade.

– Ret the cap (5) and the nut (5), fully tightening

it in an anticlockwise direction.

– Remove the wrench (2) to restore blade rotation.

• Cutting line head (Fig. 6)

NOTE

The cutting line head has a

left-hand thread and so must be unscrewed in a

clockwise direction and screwed up anticlockwise.

– Insert the wrench supplied (2) into the specic

hole in the angle transmission (3) and rotate the

cutting line head (1) by hand until the wrench

enters the inner hole, blocking rotation.

– Remove the cutting line head (1) unscrewing it

in a clockwise direction.

When mounting,

– If they were taken o during disassembly, ret

the spacer (5), the inner ring-nut (4) and the

outer ring (6), making sure that the inner ring-

nut (4) grooves match perfectly with the angle

transmission.

– Fit the cutting line head (1) screwing it up in an

anticlockwise direction.

– Remove the wrench (2) to restore shaft rotation.

MACHINE ASSEMBLY / PREPARING TO WORK

5. PREPARING TO WORK

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Alpina TB 250 JD Manual

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