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Gravely Promaster 320 User Manual

Gravely Promaster 320
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12
REPLACING MOWER BELTS
PTO BELT REMOVAL
Removal (Figure 11)
1. Remove left hand belt cover from mower deck.
2. Place 1/2-inch driver and ratchet extension into square
hole in PTO belt idler.
3. While pulling PTO belt idler towards rear of unit, remove
PTO mower belt from PTO belt idler.
4. Slowly release tension on PTO belt idler until all tension
is removed from springs.
5. Remove PTO mower belt from blade spindle pulleys,
idler pulleys, and electric clutch.
Installation (Figure 11)
1. Install the new PTO belt on electric clutch, idler pulleys,
and blade spindle pulleys.
2. Place 1/2-inch driver and ratchet extension into square
hole in PTO belt idler.
3. While pulling PTO belt idler towards the rear of unit,
install PTO mower belt on PTO belt idler.
4. Slowly release the tension until PTO belt idler is firmly
against PTO belt.
NOTE: The PTO idler spring length range should be
13 13.25 in. (33 33.6 cm). Measure the spring length
with the deck set at 2 in. height for mowing at a 1 – 3 in.
cutting height. Measure the spring length with the deck set at
4 in. height for mowing at a 3 5 in. cutting height.
5. Adjust the idler spring length as needed, see figure 12.
6. Install left hand belt cover on mower deck.
SERVICE AND ADJUSTMENTS
WARNING: AVOID INJURY. Read and understand
the entire Safety Section before attempting any
maintenance.
WARNING: MOVING PARTS can cut or amputate
body parts. ALWAYS wait for moving parts to stop
before performing maintenance or service.
CAUTION: DAMAGED OR WORN BELTS may
result in injury and/or damage to unit. Check belts
for excessive wear or cracks often.
CAUTION: Use care when releasing idler spring
tension. Keep body parts well away from idlers
when performing this operation.
Figure 11
1. PTO Belt
2. Springs
3. PTO Belt Idler
4. Blade Spindle Pulleys
5. Drive Belt Idler Pivot Bolt
6. Drive Belt Idler
7. Mower Drive Belt
8. Idler Pulleys
9. Electric Clutch
10. Square Hole
4
7
6
5
3
2
2
10
8
8
9
1
4
4

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Gravely Promaster 320 Specifications

General IconGeneral
BrandGravely
ModelPromaster 320
CategoryLawn Mower
LanguageEnglish

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