Karcher STH 953 manual Unpacking and assembly, Operating the machine, Risk of injury

English Operating Manual – Snowthrower

Read these operating instructions through carefully before operating the machine and in particular the chapter entitled “For your safety”.

Risk of being burnt. Keep at a safe distance from hot parts of the machine.

Risk of injury from thrown-out snow or solid objects.

Only touch parts of the machine when they have come to a complete halt.

Risk of injury from rotating parts. Keep hands and feet away from rotating parts.

Unpacking and assembly

Check the contents as you unpack the machine.

Assemble the machine as illustrated at the end of these operating instructions.

Before using the machine for the first time

(STH 5.56, STH 8.66, STH 10.66 C)

•It is essential to check the oil level. Refill or top up with engine oil (see “Engine instructions”) as required.

•For transportation reasons, the tyres may show a higher tyre pressure. Check tyre pressure and adjust accordingly (approx. 1 bar).

•Adjust coupling for worm drive and drive system (see “Maintenance”).

•(STH 10.66 C , STH 10.66 C)

Adjust drive lever (see “Maintenance”).

Operating the machine

!Risk of injury

Before making any adjustments

–Turn off the engine.

–Remove the ignition key and the spark-plug connector.

–Wait until the engine has cooled down.

Adjust the machine to conform to the ground and snow conditions

Adjust working position (STH 10.66 C)

Figure 4

•Use setting lever (1) to select a position to match the conditions:

–Position I: For heavy snow which has iced over. Worm is pressed onto the ground

–Position II: For normal snow conditions.

–Position III: For clearing uneven paths or for transporting the machine. Worm is at a greater distance from the ground.

Setting a drive wheel to freewheel

(STH 8.66) Figure 8

For small to moderate amounts of snow and terrain which includes many curves, the connection between right wheel and drive can be disconnected. The machine will then be easier to steer.

•Move the ring spring (1) to the outer hole (3).

For larger amounts of snow and iced-over paths, both wheels must be driven:

•Line up hole (2) of the wheel hub and the hole of the wheel axle.

•Insert ring spring (1) in both holes

(2). The wheel may not be fixed through the hole (3).

Adjust clearing plate (STH 953)

Figure 11

When the machine is standing on even ground, the worm (1), clearing plate (2) and wheels (3) must all be touching the ground at the same time. If the clearing plate is set too high, snow will be hurled backwards. If it is set too low it will be worn down faster.

To set the clearing plate:

•Tip the machine backwards.

•Loosen nuts (5).

•Set clearing plate higher or lower as appropriate and tighten nuts again.

•Tip the machine forwards again, check the setting and repeat as necessary.

Adjust the skids

(STH 5.56, STH 8.66, STH 10.66 C) Figure 7

With the skids (1), the distance between the ground and the clearing plate (5) can be set in such a way that no parts of the ground (e.g. earth or stones) can be taken up.

•(STH 10.66 C) Set setting lever (Figure 4, item 1) to position II.

•Loosen nuts (2) on both sides of the machine.

•Adjust skids to conform to the ground conditions:

–lower for uneven or non-hard- surfaced paths

–higher for even paths.

•Fasten the skids with nuts (2) in such a way that they uniformly touch the ground.

Fill up with fuel and check the oil level

!Danger of explosion and risk of being burnt

Fill up with fuel only in the open air and when the engine has been switched off and is cold. Do not smoke whilst filling up.

Never fill up with fuel to the top. If fuel overflows, let the overflowed fuel evaporate completely before you start the engine.

19