Gravely Pro-Turn 152 CARB Owner's/Operator's Manual page 31

5. Remove short mower belt from right
blade spindle and from deck. Idler pivot
bolt must be loosened slightly to gain
clearance to remove belt from under
idler pulley (Figure 20 and Figure 21).
6. Arrange new mower belt(s) on deck
(short belt first). Retighten short mower
belt idler pivot bolt. Install belts on
sheaves. Put belts onto center sheave
last.
NOTE: The PTO idler spring length range is
12.25 – 12.5" (31 – 31.8 cm) measured at a
3.5" (8.9 cm) cutting height. Adjust the idler
spring length as needed (Figure 22 and
Figure 23).
7. Replace the belt guide bolt on the idler
arm.
8. Replace belt covers and return foot
board to closed position.
48" and 52" Belt Layout
3
8
5
1
6
1. PTO Mower Belt
2. Mower Drive Belt
3. Springs
4. Mower Drive Belt Idler
5. PTO Mower Belt Idler
6. Mower Clutch Sheave
7. Center Sheave
8. Belt Guide Bolt
Figure 20
2
4
7
EN - 31
60" Belt Layout
3
5 8
1
6
1. PTO Mower Belt
2. Mower Drive Belt
3. Springs
4. Mower Drive Belt Idler
5. PTO Mower Belt Idler
6. Mower Clutch Sheave
7. Center Sheave
8. Belt Guide Bolt
Figure 21
48" and 52" PTO Idler Spring Length
Measure PTO
idler spring
length here.
The PTO idler spring length range is
12.25 – 12.5" (31 – 31.8 cm) measured at
a 3.5" (8.9 cm) cutting height. Adjust as
necessary.
Figure 22
3
2
4
7