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3.1.
Removing the input tube
First remove the output tube by untightening the 2 Allen-screws (picture 1.1 & 1.2). Then remove the Allen-screws from
the input tube (picture 1.3) Tilt the input tube backwards carefully (picture 1.4). Be aware that the machine could loose
its balance – if need be, support the frame at the bumper (picture 1.5). If the input tube is tilted backwards, it can be
removed from the machine sideways (picture 1.6). Mount the input tube by following the same steps in reverse order.
1.1
1.2
1.3
1.4
1.5
1.6
3.2. Replacing and Adjusting the drive belts
Remove the key from the switch before changing the belts.
Remove the cover from the belt housing. Unscrew the bolts fixed horizontally to the engine (2.1) Loosen slightly the bolts
that fix the engine on the chassis (2.2). Move the engine block to the back. Check that the belt housing is moving in the
same direction. Now it is simple to remove the old belts and to fit the new ones. Note that once the belts are removed, it
is easy to check the distance between blades and counterblade (0.5 mm), because the rotor can turn freely.
Only use belts with the correct power transmission rating!
2.1
2.2
2.3
2.4
Tension the belts by moving the engine block forwards and, once the correct belt tension is found, block the engine
position by screwing tight the 4 bolts to the chassis.
Once you have got the right tension, check that the pulleys are in–line. You can see this by holding a bar against the pulleys
(2.3). You have reached the right tension when the belt can be pulled down ± 3 cm/1.2 inches (2.4)
When new belts are fitted the distance between pulley spindles should be +/- 670 mm. Check after tensioning the belts that
the pulleys are in-line again. Check that all bolts are tightened properly, especially the bolt holding the belt housing to the
rotor housing. Put the cover for the belt housing back in place and mount the input and output tubes.
After changing the belts, let the machine run for 5 minutes without load. While running without load, check the machine for
loose bolts, unusual noises or vibrations. Now the machine is ready for use.
3.3. Changing the engine oil.
Change the engine oil after the first 5 hours of use. Take care no oil is spilled. It is recommended to use a hose with a clip
fitting the thread of the drain plug (thread M12x1,5)
To fit the hose, it is recommended to tilt the machine backwards and to let it rest on the bumper. Support the machine in
front, so it does not tip over again.
Screw the clip of the hose on the drain plug. Put a collector tin or basin in place, big enough to contain 1.5 liter of engine oil.
Tilt the machine forward and let the hose drop into the collector. Let the oil flow and then drip for a little while.
Attention: used oil is considered to be chemical waste. Bring the oil to a certified collection point.
Remove the hose and screw the drain plug back into the engine. Fill the engine with 1.1 liter of 15W40 engine oil. Use a
funnel to avoid spillage. Direction: you can also tilt the machine backwards to re-fill oil.
GTM Professional - GTS900
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