Gravely COMPACT-PRO 991072 User Manual
Page 27
GB - 27
Replacing the Hydro Pump Belt
1. Properly stop and park unit (See
2. Remove the PTO belt from the mower
clutch sheave (See Replacing Mower
Belts on page 26).
3. Slowly release the tension on the hydro
pump belt idler until all the tension is
removed from the springs.
4. Remove old hydro pump belt from right
hand hydrostat sheave first (Figure 20).
5. Install new hydro pump belt by
positioning belt on sheaves. Put belt
onto right hand hydrostat sheave last.
6. Replace long mower belt on mower
clutch sheave. See Replacing Mower
Belts on page 26.
MOWER DECKS
Anti-scalp Roller Adjustment
The anti-scalp rollers are set at the factory for
typical mowing height, but can be adjusted for
high or low cutting conditions (Figure 21).
Anti-Scalp rollers are intended to prevent
lawn scalping, not to control cutting height.
For a very high cutting height, set the anti-
scalp rollers in the lowest position on the
bracket.
For a very low cutting height, set the anti-
scalp rollers in the highest position on the
bracket.
NOTE:
There are four anti-scalp rollers on
the outside of the mower deck and four anti-
scalp rollers on the inside of the mower deck.
Make sure all anti-scalp rollers are set at the
same height.
Removing the Mower Deck
1. Remove PTO belt (See Replacing
Mower Belts on page 26).
2. Lock the mower deck in the service
position.
CAUTION:
Use care when
releasing idler spring tension.
Keep body parts well away from
idlers when performing this
operation.
OF1631
1.Hydro Belt
2.Spring
3.Idler
4.Engine Sheave
5.Right Hand
Hydrostat
6.Left Hand
Hydrostat
7.Clutch
8.Clutch Anchor
Figure 20
6
1
5
2
7
8
4
3
WARNING:
AVOID INJURY.
Mower lift arms and mower lift
pedal could cause severe injury if
they are not locked before
removing the mower deck.
ALWAYS lock mower deck lift
before removing the deck.
Highest
Cutting
Height
OF3590
Figure 21
Lowest Cutting
Height