Gravely Pro-Master 252 Owner's/Operator's Manual page 28

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Figure 21
PTO BELT
WARNING: MOVING PARTS can
cut or amputate body parts.
ALWAYS wait for moving parts to
stop before performing
maintenance or service.
CAUTION: DAMAGED OR
WORN BELTS may result in injury
and/or damage to unit. Check
belts for excessive wear or cracks
often.
NOTE: The Ogura electric clutch can be
adjusted if the clutch starts to slip (see Clutch
Adjustment on page 34).
Removal (Figure 22)
1. Open footboard (see Mower Drive Belt
And Pto Belt Access on page 27).
2. Remove left hand belt cover from mower
deck.
CAUTION: Use care when
releasing idler spring tension.
Keep body parts well away from
idlers when performing this
operation.
3. Place 1/2-inch driver and ratchet
extension into square hole in PTO belt
idler.
4. While pulling PTO belt idler towards rear
of unit, remove PTO mower belt from
PTO belt idler.
1. Footboard in
open position
2. Frame
3. Latch
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5. Slowly release tension on PTO belt idler
until all tension is removed from springs.
6. Remove PTO mower belt from blade
spindle pulleys, idler pulleys, and
electric clutch.
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1 2
10
9
1. PTO Belt
2. Square Hole
3. Springs
4. Drive Belt Idler Pivot Bolt
5. Drive Belt Idler
6. Mower Drive Belt
7. Blade Spindle Pulleys
8. PTO Belt Idler
9. Electric Clutch
10.Idler Pulleys
Figure 22
Installation (Figure 23)
1. Install the new PTO belt on electric
clutch, idler pulleys, and blade spindle
pulleys.
2. Place 1/2-inch driver and ratchet
extension into square hole in PTO belt
idler.
3. While pulling PTO belt idler towards the
rear of unit, install PTO mower belt on
PTO belt idler.
4. Slowly release the tension until PTO belt
idler is firmly against PTO belt.
NOTE: The PTO idler spring length range is
12.25 to 12.50 in. (31 to 31.8 cm) measured
at a 3 in. (7.6 cm) cutting height. Adjust the
idler spring length as needed (Figure 23).
5. Install belt guard on rear of unit.
6. Install left hand belt cover on mower
deck.
7. Close footboard (see Mower Drive Belt
And Pto Belt Access on page 27).
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