Gravely Pro-Master 260 Owner's/Operator's Manual page 30

992217
3
2
1
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 18
Installation (992217)
(Figure 18)
1. Install the new PTO belt on electric
clutch, idler pulleys, and blade spindle
pulleys.
2. Place 1/2" 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.
NOTICE: The PTO idler spring length range
is 12.38 – 12.62" (31.4 to 32.1 cm) measured
at a 3" (7.6 cm) cutting height. Adjust the idler
spring length as needed (Figure 19).
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 29).
4
5
6
7
8
EN - 30
PTO Idler Spring Length
The PTO idler spring length range is
12.38 – 12.62" (31.4 to 32.1 cm)
measured at a 3" (7.6 cm) cutting height.
Adjust as necessary.
Figure 19
Removal (992219)
(Figure 20)
1. Open footboard (see Mower Drive Belt
And PTO Belt Access on page 29).
2. Remove belt guard from rear of unit.
3. 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.
4. Loosen clamp bolt on arm and jam nut
on hex bolt.
5. Turn the hex bolt counter clockwise until
tension is completely removed from the
spring.
6. Remove PTO mower belt from blade
spindle pulleys, idler pulleys, and
electric clutch.
992217
Measure
PTO idler
spring
length here.