Gravely Promaster 992066, 992067, 992068, 992069, 992070, 992071, 992072 Owner's/Operator's Manual page 23

2. Remove long mower belt from left blade spindle
and remove from deck.
3. Slowly release the tension on the short belt idler
until all the tension is removed from the springs.
4. Remove short mower belt from right blade spindle
and from deck. Idler pivot bolt must be loosened
slightly to gain clearance to remove belt from under
idler pulley (Figure 16).
5. Arrange new mower belt(s) on deck (short belt
first). Retighten short mower belt idler pivot bolt.
Install belts on sheaves. Put belts onto center
sheave last.
6. Replace belt covers and return foot board to closed
position.
3
2
1
7
2
1
7
1
6
Figure 16
Replacing the Hydro Pump Belt
1. Properly stop and park unit (refer to Operation
Section).
2. Remove the long mower belt from the mower clutch
sheave. See Replacing Mower Belts on page 22.
CAUTION: Use care when releasing idler spring
tension. Keep body parts well away from idlers
when performing this operation.
3. Remove clutch anchor.
4
5
72" Belt
Layout
2
52" and 60"
Belt Layout
5 4
3
1. Long Mower Belt
2. Springs
3. Center Sheave
4. Short Mower Belt Idler
5. Short Mower Belt
6. Mower Clutch Sheave
7. Long Mower Belt Idler
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4. Slowly release the tension on the hydro pump belt
idler until all the tension is removed from the
springs.
5. Remove old hydro pump belt from right hand
hydrostat sheave first (Figure 17).
6. Install new hydro pump belt by positioning belt on
sheaves. Put belt onto right hand hydrostat sheave
last.
7. Replace clutch anchor.
8. Replace long mower belt on mower clutch sheave.
See Replacing Mower Belts on page 22.
1
8
7
1. Right Hand Hydrostat
2. Hydro Belt
3. Left Hand Hydrostat
4. Spring
MOWER DECKS
Adjusting Anti-Scalp Rollers
The anti-scalp rollers are set at the factory for typical
mowing height, but can be adjusted for high or low
cutting conditions (Figure 18).
Rollers are intended to prevent lawn scalping, not to
control cutting height.
For a very high cutting height, set the rollers in their
lowest position on the bracket.
For a very low cutting height, set the rollers in their
highest position on the bracket.
All rollers should be set at the same height.
GB - 23
2
5
6
5. Clutch
6. Clutch Anchor
7. Engine Sheave
8. Idler
Figure 17
3
4
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