Echo CSG-7410 Operator's Manual page 29

Washer
Tension screw
Water-flush
pipe
Tension screw
Belt
Pulley
(small)
Belt Change and Adjustment
Mark
Bolt
Pipe connector
Pulley cover
Clutch cover
Cutter arm
Belt
Clutch cover
Adjusting the Belt
Adjust the belt if it becomes loose.
1. Loosen the 2 pulley cover bolts about 1 turn.
2. Turn the tension screw so the washer lines up
with the mark on the clutch cover.
3. Tighten the 2 pulley cover bolts. Note: Tighten to
a torque of 23 to 27N･m (230 to 270 kgf･cm).
Replacing the Belt
Replace the belt when it becomes very worn
(peeling, turning, cuts, cracking, etc.)
1.Disconnect the water-flush pipe from the pipe
connector.
2. Loosen the tension screw and then remove the
2 pulley cover bolts.
3. Remove the pulley cover along its rail.
4. Loosen the clutch cover bolt and then remove
the clutch cover.
5. Remove the old belt and then remove the cutter
arm.
6. Put the new belt on the small pulley.
7. While pulling the belt in the direction of the cutter,
install the clutch cover and fasten it with its bolt.
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CSG-7410