Troubleshooting – Karcher STH 10-76 W User Manual

Page 21

English

(Not STH 953 W)
Figure 2

For clutch tensions with adjustable cov-
ers (6):

Tightening: Loosen nuts (7) and screw
in the adjustable covers (6).

Loosening: Loosen adjusting covers (6)
and screw in the nuts (7) in the opposite
direction.

For clutch tensions with release spring
(8):

Before doing the setting, remove the
spring and then reinsert it. The clutch
tension is correct when the spring ex-
pands 2-3 cm while coupling.

Tightening: Screw the safety nut (9) up-
ward.

Loosening: Screw the safety nut (9)
downward.

For clutch cables with adjustment plates
for travel drive (10) or for auger drive
(11):

Tightening: Loosen screw (A) depend-
ing on the adjustment plate, slide ad-
justment plate down and reattach the
screw (A).

Loosening: Loosen screw (A) depend-
ing on the adjustment plate, slide ad-
justment plate up and reattach the
screw (A).

(Not STH 953 W)
Figure 12

ṇ

Warning

Risk of damage to the machine! While tilting
the machine, ensure that it retains its bal-
ance and no fuel or oil in the air filter leaks
into the engine compartment or to the out-
side.
Î

Loosen the screws of the frame; tilt the
device forward, if required.

Release the clutch lever for travel drive
and shift to all gears; while doing so, the
friction wheel (2) should not touch the
drive disc (3). Otherwise loosen cou-
pling tension (see "Changing the clutch
tension setting").

Press the clutch lever for travel drive in
each gear; the friction wheel must al-
ways touch the drive disc. Otherwise
tighten the clutch tension (see "Chang-
ing the clutch tension setting").

Clean the drive disc and rubber on the
friction wheel, if required; they should
be grease-free.

Remove ice pieces, if any.

(only STH 953 W)
Figure 5
If the auger runs unevenly while the engine
speed remains constant, the V-belt (5) must
be retensioned.
Î

If there is an additional boring (3b) on
the clutch lever (1), hook the clutch ca-
ble (2) into the upper boring (3b).

If there is no additional (upper) boring or
if it is already being used, visit an au-
thorized workshop.

(STH 8.66 W, STH 10.66 W Crt, STH
10.71 W, STH 13.84 W)
Figure 11 A
(Machines with switching rod)
Î

Remove spring pin (4) and underlying
disc (5), remove the spindle nut (6) from
the hole (7).

Press the switch arm (2) downward; set
the switching lever (3) to gear "6".

Turn the spindle nut (6) in such a way
that the pin can be inserted in the same
whole (7).

Secure the spindle nut with an underly-
ing disc and spring pin.

Figure 11 B
(Machines with switching tension)
Î

Set the switching lever (3) to the fastest
forward gear.

Loosen screw (A) and press the holder
downward till the switching tension is
tight.

Now tighten screw (A) again.

Check correct setting.

Note
This setting is required only if the fastest
gear (forward or reverse) cannot be put.

(machines with track drive)
Figure 6
The track belt (1) is adjusted correctly if it
can be deflected 10 - 12 mm by hand. Oth-
erwise it has to be readjusted.
Î

Position the machine on an even and
horizontal surface so that the tracks no
longer touch the ground.

Turn the nut (2) until the track belt has
the correct tension. In clock-wise direc-
tion: Tighten. Anticlockwise direction:
Loosen.

(machines with track drive)
Figure 6
Î

Position the machine on an even and
horizontal surface so that the tracks no
longer touch the ground.

Turn the nut (2) anticlockwise until the
track belt can be removed.

Replacing the track belt Retension the
new track belt using the nut (2) (see
"Adjusting the track belt").

(Not STH 953 W)
Figure 8
The auger (3) is fastened to the drive shaft
(4) using shearing bolts (1) and locknuts or
splints (2). The bolts are designed in such a
way that they break (shear off) when the
snail comes in contact with foreign bodies.
This protects the machine against damag-
es. These parts should only be replaced by
original spare parts (Spare bolts and lock
nuts or splints are included as options in
standard delivery, part W).

Remove broken bolts (1) and locknut or
splint (2); clean and lubricate the fasten-
ing point.

Use new shearing bolt and new locknut
or splint.

Only STH 953 W:

Figure 10
Î

Tilt the appliance rearward.

Remove screws (4) and nuts (5).

Replace the clearing plate (2).

Fasten new clearing plate to the casing
using screws and nuts.

Tilt the machine backwards, check (see
"Adjusting the clearing plate").

Not STH 953 W:

Figure 7
Î

Remove screws (6), underlying discs
(7) and nuts (8).

Replace the clearing plate (5).

Fasten new clearing plate to the casing
using screws, underlying disc and nuts.

(Not STH 953 W)
Figure 7
Î

Remove nuts (2), underlying discs (3)
and screws (4).

Loosen the landing skids (1) on both the
sides of the casing.

Adjust the new landing skids (see "Ad-
justing the landing skids").

Danger

Risk of injury!
Before doing any work on the machine:
– Switch off engine.
– Pull out the ignition key and the ignition

plug.

– Allow engine to cool down.
Note
Some of the functioning problems have
simple causes and you can rectify them
easily. Call up an authorised workshop in
case of doubt or if mentioned explicitly.
Note
Repairs should only be done by authorised
workshops using original spare parts.

Changing the clutch tension setting

Checking the travel drive

Tensioning the V-belt of the auger

Setting the switching lever

Adjusting the track belt

Replacing the track belt

Replacing shearing bolts

Replacing the clearing plate

Replacing the landing skids

Troubleshooting