Gravely Promaster 252 Owner's And Operator's Manual page 22

NOTE: The PTO idler spring length range is 13 to 13.25 in.
(33 to 33.6 cm) measured at a 3 in. (7.6 cm) cutting height.
Adjust the idler spring length as needed, see figure 21.
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 25).
PTO Idler Spring Length
The PTO idler spring length range is 13 to 13.25 in.
(33 to 33.6 cm) measured at a 3 in. (7.6 cm) cutting
height. Adjust as necessary.
MOWER DRIVE BELT REMOVAL
Removal (Figure 20)
NOTE: The PTO belt must be removed from blade spindle
pulleys prior to removing mower drive belt. The PTO belt
does not need to be removed from electric clutch.
1. Remove PTO belt from blade spindle pulleys (see PTO
BELT REMOVAL on page 25).
2. Remove mower drive belt from right blade spindle pulley
and then from center blade spindle pulley.
3. Loosen drive belt idler pivot bolt just enough to gain
clearance to remove mower drive belt from under drive
belt idler.
4. Remove mower drive belt from unit.
Installation (Figure 20)
1. Install the new mower drive belt on center blade spindle
pulley, right blade spindle pulley, and drive belt idler.
2. Tighten drive belt idler pivot bolt.
3. Install PTO belt on blade spindle pulleys (see PTO BELT
REMOVAL on page 25).
.
Measure PTO idler
spring length here.
Figure 21
TRANSMISSION BELT REMOVAL (992111, 113,
115, 117, 124, 127, 128, 129, 130, 131, 132, 133,
134, 135, 139, 145)
Removal (Figure 22)
1. Remove PTO belt from electric clutch (see PTO BELT
REMOVAL on page 25).
CAUTION: Use care when releasing idler spring
tension. Keep body parts well away from idlers
when performing this operation.
2. Remove clutch anchor.
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.
Installation (Figure 22)
1. Install new hydro pump belt by positioning belt on
sheaves. Put belt onto right hand hydrostat sheave last.
2. Replace clutch anchor.
3. Install PTO belt on electric clutch (see PTO BELT
REMOVAL on page 25).
1
8
OF3229
1. Right Hand Hydrostat
2. Hydro Belt
3. Left Hand Hydrostat
4. Spring
TRANSMISSION BELT REMOVAL (992121, 123,
125, 126, 136, 137, 138)
Removal (Figure 23)
NOTE: A 1/2-inch ratchet driver is needed to remove
transmission belt.
1. Place unit in the service position (see SERVICE
POSITION on page 20).
CAUTION: Use care when releasing idler spring
tension. Keep body parts well away from idler when
performing this operation.
GB - 26
2
7
5. Clutch
6. Clutch Anchor
7. Engine Sheave
8. Idler
Figure 22
3
4
5
6
OF1631