Gravely Promaster 34Z Owner's/Operator's Manual page 20

Replacing the Hydro Pump Belt
1. Properly stop and park unit (See Operation on page 10).
2. Remove the PTO belt from the mower clutch sheave (See
Remove PTO Belt (992056, 314) on page 19).
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 (992056, 314) on page 19.
5
3
4
1. Hydro Belt
2. Spring
3. Idler
4. Engine Sheave
Figure 18
MOWER DECKS
Removing the Mower Deck
1. Remove PTO belt (See Remove PTO Belt (992056, 314)
on page 19).
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.
6
1
2
7
8
5. Right Hand Hydrostat
6. Left Hand Hydrostat
7. Clutch
8. Clutch Anchor
OF1631
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.
5
3
2
3
1. Mower Lift Arm
2. Link Chain
3. Mower Mounting Arm
Installing the Mower Deck (Figure 19)
1. Slide mower deck under unit.
2. Connect mower mounting arms to deck with mower
mounting pins.
3. Install link chains on the mower lift arms in the same holes
they were removed from.
4. Install PTO mower belt (See Remove PTO Belt (992056,
314) on page 19).
5. Level mower deck (See Leveling the Mower Deck on
page 21).
GB-20
1
2
4
OF3765
4. Mower Mounting Pin
5. Mower Lift Arms
Locked
Figure 19
OF3755
3