Gravely 992055 25HP PM160Z - Manual (Page 23)

GB - 23
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 18).
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.
All anti-scalp rollers should be set at the same height.
MOWER LIFT PEDAL ADJUSTMENT
The mower lift pedal can be adjusted to decrease or
increase the amount of force required to lift the mower deck.
NOTE: Decreasing the amount of force required to lift the
mower deck will increase the mower deck’s bouncing.
Increasing the amount of force required to lift the mower
deck will decrease the mower deck’s bouncing.
IMPORTANT: Adjust the mechanical lift spring on each side
of the unit to the same length.
• Adjust the eye-bolt to increase the length of the
mechanical lift spring which will decrease the amount of
force required to lift the mower deck.
• Adjust the eye-bolt to decrease the length of the
mechanical lift spring which will increase the amount of
force required to lift the mower deck.
Removing the Mower Deck
NOTE: Only remove PTO belt from electric clutch.
1. Remove PTO belt from electric clutch (see Replacing
Mower Belts on page 22).
NOTE: Perform steps 2 and 3 for mechanical lift mower
decks only (992064, 083, 092, 093, 094, 095, 096, 097).
2. Raise mower deck to transport position (see Mower Lift
Pedal (992064, 083, 092, 093, 094, 095, 096, 097) on
page 13).
3. Remove mechanical lift spring from each side of unit
(Figure 20).
4. Lower mower deck all the way down.
5. Remove link chains from mower lift arms. Note hole
location on mower lift arms for replacement.
6. Remove mower mounting arms from frame.
7. Slide mower deck out from under unit.
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 17
5
1
6
2
7
8
4
3
Highest
Cutting
Height
Lowest
Cutting
Height
OF3590
Figure 18
CAUTION: Use care when releasing mechanical lift
spring tension. Keep body parts well away from
springs when performing this operation.
Figure 19
OF4040
Increased Spring Length = Decreased Force
Decreased Spring Length = Increased Force
1
1. Eye-Bolt 2. Mechanical Lift Spring
2
Figure 20
1. Eye-Bolt 2. Mechanical Lift Spring
OF4040
1
2