ENGLISH

7.7ADJUSTING THE CONTROL WIRES

When the belts are adjusted or replaced, the control wires must also be checked/adjusted (see below).

7.7.1 Adjusting auger wire

1.Remove the ignition key.

2.Dismantle the belt cover (1) by loosing the screw (2). See fig. 16.

3.Actuate the auger drive lever and observe the tension pulley. When the auger lever is in its half way of movement against the handle, the pulley movement shall stop against the belt (the pulley is allowed to move a few mm during the last half of movement of the lever). See fig. 24.

4.If necessary, unhook the spring and adjust the wire at the screw, connected to the spring. See fig. 25.

5.Reassamble all parts in the reverse order.

7.7.2 Adjusting drive wire, Man

1.Remove the ignition key.

2.Lift the snow thrower forward and rest in on the auger housing.

3.Loosen the screws (3) and dismantle the bottom plate (2). See fig. 15.

4.Actuate the auger drive lever and observe the friction disc. When the auger lever is in its half way of movement against the handle, the friction disc shall touch the friction wheel. See fig. 28.

5.If necessary, unhook the wire at the adjusting plate and replace the wire in a suitable hole. See fig. 26.

6.Reassamble all parts in the reverse order.

7.7.3 Adjusting drive wire, HST

The drive wire, HST has no adjustment. The clutch is adjusted with the belt tensioning pulley. See “7.6.2”.

7.8FRICTION WHEEL, MAN

If the snow thrower does not move forward/backward the problem could be the driving belt, driving control wire or friction wheel. Check the friction wheel as follows.

7.8.1 Checking the friction wheel

1.Remove the ignition key.

2.Lift the snow thrower forward and rest in on the auger housing.

3.Loosen the screws (3) and dismantle the bottom plate (2). See fig. 15.

3.Put the gear stick in neuitral position.

4.With the gear stick in the neutral position, the centre of friction wheel shall correspond with the centre of the friction disc. See fig. 28.

5.Adjustments are carried out as described below.

6.Reassemble in the reverse order.

7.8.2 Adjusting the friction wheel

1.Loosen the friction wheel linkage and set the friction wheel until the measurement in position 4 above is obtained.

2.If the friction wheel is heavy worn and adjustments cannot be carried out satisfactorily, replace in accordance with the following instructions.

3.Otherwise reassemble in the reverse order after adjusting.

7.8.3 Replacing the friction wheel

1.Disassemble the differential according to 7.9.

2.Disassemble the two bearing attachments (M in fig. 23).

3.Disassemble the shaft and bearing attachments. Note the location of the two washers (17 in fig. 29).

4.Replace the friction wheel on its hub (fig. 30).

5.Reassemble all the parts in the reverse order. Note the following when reassembling:

-Check that the washers (17 in fig. 29) are correctly placed.

-Check that the washers (13 in fig. 29) are correctly placed.

-Check that the shaft (8 in fig. 30) rotates freely.

-Check that the friction wheel and disc drive plate are totally free from oil and grease.

7.9REPLACING THE DIFFERENTIAL

See fig. 31.

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 REPLACING THE SHEAR BOLTS

The auger is fastened to the shaft by special bolts that are designed to break if something gets stuck in the auger housing.

Always use genuine spare parts. Other types of bolts could cause serious damage to the machine.

1.Stop the engine.

2.Disconnect the ignition cable from the spark plug.

3.Ensure all the rotating parts have stopped.

4.Remove the object that has fastened in the auger.

5.Lubricate the auger shaft (see above).

6.Aligne the holes in the shaft and auger.

7.Remove the broken bolt parts.

8.Assemble a new original shear bolt.

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Stiga 1381 HST Adjusting the Control Wires, Friction WHEEL, MAN, Replacing the Differential, Replacing the Shear Bolts
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