Adjusting Mower Belt - Gravely Promaster 100 Service Manual

4.11 ADJUSTING MOWER BELT

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6
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7
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2
1. Long Mower Belt
2. Short Mower Belt
3. Idler Rods
4. Springs
Figure 9
Check the mower belt after the first 8 hours of
operation for proper tension. Thereafter, check the
mower belt for proper tension every 25 hours of
operation.
To tighten the mower belts:
1. Set mower cut height to 3.5 inches.
2. Stop the engine. Remove the ignition key.
3. Remove footboard from support frame. (On 60"
mower only).
4. Loosen the jam nut on the idler rod. See Figure 9.
5. Turn the adjusting nut on the idler rod until the gap
between the coils of the spring is .010" to .015"
(.25 mm to .38 mm).
6. Hold the adjusting nut and lock the jam nut against
it.
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3
8
1
4
7
5. Jam nuts
6. Adjusting Nuts
7. Spindle Sheaves
8. Idlers
P G0341
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