Gravely Promaster 34Z Manual Del Operador página 18

Replacing the Hydro Pump Belt
1. Properly stop and park unit (See Operation on page 8).
2. Remove the PTO belt from the mower clutch sheave (See
Remove PTO Belt (991022) on page 17 or Replacing
Mower Belts (991023) on page 17).
CAUTION: Use care when releasing idler spring
tension. Keep body parts well away from idlers when
performing this operation.
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 18).
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
Remove PTO Belt (991022) on page 17 or Replacing
Mower Belts (991023) on page 17.
5
3
4
1. Hydro Belt
2. Spring
3. Idler
4. Engine Sheave
Figure 18
MOWER DECKS
Anti-scalp Roller Adjustment (991023)
The anti-scalp rollers are set at the factory for typical
mowing height, but can be adjusted for high or low cutting
conditions (Figure 19).
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.
There are four anti-scalp rollers on the outside of the
NOTE:
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.
6
1
2
7
8
5. Right Hand Hydrostat
6. Left Hand Hydrostat
7. Clutch
8. Clutch Anchor
OF1631
Lowest
Cutting
Height
Highest
Cutting
Height
Removing the Mower Deck
1. Remove PTO belt (See Remove PTO Belt (991022) on
page 17 or Replacing Mower Belts (991023) on page 17).
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.
2. Lock the mower deck in the service position.
Push the mower lift pedal forward between cutting height
number 4 and number 5 to align the holes in the deck lift
shaft and the deck lift cover. Insert the cutting height pin in
the holes on the side of the deck lift cover so it passes all
the way through the deck lift cover and shaft.
IMPORTANT: The mower lift arms are not locked unless the
cutting height adjustment pin passes all the way through both the
deck lift cover and shaft.
NOTE: Support the mower deck on blocks or jack stands before
disconnecting link chains from mower lift arms to prevent the
deck from falling.
3. Remove link chains from mower lift arms. Note hole
location on mower lift arms for replacement.
4. Remove the mower mounting pins connecting the mower
mounting arms to the deck.
5. Slide mower deck out from under unit.
GB-18
Figure 19
OF3590