Mower Decks - Gravely Pro-Turn 400 LP Operator's Manual

PTO Idler Spring Length
Measure PTO idler
spring length at outer
ends of spring.
The PTO idler spring length range is
31 – 31.8 cm (12 1/4 – 12 1/2") measured
at a 8.9 cm (3 1/2") cutting height. Adjust
as necessary.
Figure 35
Replacing the Hydro Pump Belt
(Figure 36)
1. Properly stop and park unit (See Starting
And Shutting Off Engine on page 23).
2. Remove the PTO belt from the mower
clutch sheave (See Replacing Mower
Belts on page 38).
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 the clutch anchor and mounting
hardware.
5. Remove old hydro pump belt from right
hand hydrostat sheave first (Figure 36).
6. Install new hydro pump belt by positioning
belt on sheaves. Put belt onto right hand
hydrostat sheave last.
7. Replace clutch stop. Tighten hardware to
27 – 45 N•m (20 – 33 lb-ft).
8. Replace long mower belt on mower
clutch sheave. See Replacing Mower
Belts on page 38.
2
6
3
9
1. Hydro Belt
2. Spring
3. Idler
4. Engine Sheave
5. Right Hand Hydrostat
6. Left Hand Hydrostat
7. Clutch
8. Clutch Anchor
9. Mounting Hardware

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 37).
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.
NOTICE: There are two anti-scalp rollers on
the outside of the mower deck and two anti-
scalp rollers on the inside of the mower deck.
Make sure all anti-scalp rollers are set at the
same height.
EN - 39
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8
Figure 36
5
7
4