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ENGLISH
EN
7.8.3 Replacing the friction wheel
1. Disassemble the differential according to 7.9.2.
2. Disassemble the two bearing attachments (M in fig. 24).
3. Disassemble the shaft and bearing attachments. Note the
location of the two washers (17 in fig. 30).
4. Replace the friction wheel on its hub (fig. 31).
5. Reassemble all the parts in the reverse order. Note the
following when reassembling:
- Check that the washers (17 in fig. 30) are correctly
placed.
- Check that the washers (13 in fig. 30) are correctly
placed.
- Check that the shaft (8 in fig. 31) rotates freely.
- Check that the friction wheel and disc drive plate are
totally free from oil and grease.
7.9
DIFFERENTIAL (966 D)
7.9.1 Description
In the differential the drive force is transferred from the chain
drive to the right and left shafts via two free wheels, one for
each shaft.
This means that the outer wheel can rotate faster than the in-
ner wheel on bends.
With the differential the snow thrower is as easy to drive
around bends as straight forward.
The differential also makes the snow thrower easier to handle
on hard surfaces, for example in the garage or in the store.
7.9.2 Replacing the differential
See fig. 36.
The differential (A) is replaced according to the following
instructions:
1. Remove the ignition key.
2. Lift the snow thrower forward and rest in on the auger
housing.
3. Disassemble the wheels.
4. Loosen the screws (3) and dismantle the bottom plate (2).
See fig. 15.
5. Disassemble the bearing housings (B) with bearings at
both sides.
6. Loosen the intermediate shaft (C) by disassembling the
bearing screws (D) at both sides.
7. Slacken the chain tension by loosening the support
bearing attachment (E). The support bearing attachment
is loosened by disassembling the two screws at the top.
8. Remove the chain from the differential.
9. Pull out the shafts from the differential and remove the
differential.
10. Check the chains. Replace if required. The chains shall
not be lubricated. They are factory lubricated. Excessive
grease can spoil the friction if it reach the friction wheel
or the friction disc.
11. Check the bearings for dissonance and uneven friction at
rotation. Replace if required.
12. Reassemble all parts in the reverse order.
7.10 HYDROSTAT (1171 HST, 1381 HST)
7.10.1 Description
See fig. 32.
The hydrostatic power-transmission transfers the power from
the motor to the driving wheels with stepless ratio forwards
as well as backwards.
The unit consists of a hydraulic pump and a hydraulic motor.
The hydraulic pump can be set with an angle positioned disc
to pump different amount of oil.
A big angle of the disc gives a big stroke to the peripheral
located pistons and such a big oil flow.
A small angle gives a small stroke and such a small oil flow.
By angeling the disc over to the other side, the oil will flow
in the opposite direction and the machine moves backwards.
The oil flow is then conducted to a hydraulic motor. The
hydrauic motor has a fixed angle positioned disc to which the
peripheral located pistons push. This makes the unit, where
the pistons are located, to rotate.
7.10.2 0Troubleshooting
See fig. 33-35.
At malfunction in the hydrostat, in first-hand check the
following:
1. The by-pass valve shall be in closed position. I.e. the
lever (K) in fig. 35 shall be in its forward position in the
machines´ direction of travel.
2. The speed lever (J) shall be able to move between its end
positions when actuating the handlebar speed lever. Ev.
adjustments is performed at the link (7) in fig. 7.
3. Check that the driving belt is intact. See 7.6.
4. Check the oil level. See below.
7.10.3 Replacing the hydrostat
See fig. 33-35.
The hydrostat, (B) in fig. 33, can be replaced according to the
instructions below:
1. Remove the ignition key.
2. Disassemble the belt cover (1) by loosening the screws
(2). See fig. 16.
3. Arrange the machine on its auger.
4. Disassemble the wheels by removing the wheel lockings.
See (2) in fig 8.
5. Disassemble the bottom plate (2) by loosing the four
screws (3). See fig. 15.
6. Loosen the speed lever lower attachment (4) in fig. 7.
7. Disassemble the screw (A) with its nut and pull out the
wheel axle (D) to the left.
8. Loosen the screw (G) and rotate the wire attachment (E)
forwards. After that, disassemble the screw (F) holding
the front part of the hydrostat.
9. Hold the hydrostat and disassemble the screw (C). After
that, remove the hydrostat from the machine.
10. Assemble the hydrostat in the reverse order.
Note! Check that the ventilating hose remain intact
during the assembling procedure and is located on its
nipple also after the assembly.
Note! Check that the by-pass lever (K) in fig. 35 is closed
(position C) after the assembling procedure. I.e. in its
forward position in the machines´ direction of travel.
Содержание Royal 1171 HST
Страница 2: ...2 6 5 4 3 2 1 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 A D E F 1 2 3...
Страница 3: ...3 G L M Man 1 2 K J 1 2 3 4 5 7 M L HST 4 6 8 5 7 9...
Страница 4: ...4 R R S A B C 5 6 8 3 2 3 10 12 14 11 13 15...
Страница 5: ...5 1 2 Man A B C D E F G H I HST J A B E L G I E Man HST E L J 16 18 20 17 19 21...
Страница 6: ...6 12 13 mm M N O M Q Man HST ca 45 mm Man 1 2 22 24 26 23 25 27...
Страница 7: ...7 Man Man 8 7 14 13 13 7 17 17 HST Man Man 4 5 6 8 4 A B C D 28 30 32 29 31 33...
Страница 8: ...8 G E F HST A E C B D Man C O K 25 mm H J HST 34 36 35...
Страница 83: ...www stiga com GGP Sweden AB Box 1006 SE 573 28 TRAN S...
