Drive Chain Maintenance; Checking And Adjusting The Drive Chain - Toro MMX-650E-S 60212C Operator's Manual

Drive Chain Maintenance

Checking and Adjusting the
Drive Chain
Service Interval: After the first 10 hours
Every 50 hours
The drive chain should have 5 to 10 mm (7/32 to 13/32 inch)
of flex when applying 6.8 kg (15 lb) of pressure at mid-span.
Checking the Drive-Chain Tension
1. Remove the divider plate; refer to
Divider Plate (page
2. Place a straightedge along the chain from 1 sprocket
to the other (Figure
1
Figure 45
1. Flex of 5 to 10 mm (7/32 to 13/32 inch)
3. With your finger, push on the chain with 6.8 kg (15 lb)
of pressure, midway between the sprockets
4. Measure the distance from the chain to the straightedge;
the distance should be 5 to 10 mm (7/32 to 13/32
inch). If the chain tension needs adjustment, refer to
Adjusting the Drive-Chain Tension (page
5. Install the divider plate; refer to
Plate (page 23).
Removing the
22).
45).
G021606
(Figure
30).
Installing the Divider
Adjusting the Drive-Chain Tension
Note: Adjusting the tension of the drive chain affects the
tension of the belts; adjust the belt tension after adjusting
the drive-chain tension.
1. Remove the divider plate; refer to
Divider Plate (page
2. Loosen the nuts and bolts that secure the pillow-block
bearings for the idler pulley
1
1. Drive chain
2. Pillow-block bearings
3. Slide the pillow-block bearings, along with the idler
pulley and small sprocket, to the right to increase
the chain tension, or to the left to decrease the chain
tension.
Note: To slide the pillow-block bearings to the left,
you must loosen the jam nut and tensioner bolt
47). To slide the pillow-block bearings to the right,
you must loosen the motor mounting nuts and bolts
(Figure 39).
45).
1. Tensioner bolt
4. When the chain has 5 to 10 mm (7/32 to 13/32 inch)
of flex, tighten the tensioner bolt, the jam nut, and the
nuts and bolts that secure the pillow-block bearings.
5. Adjust the belt tension; refer to
Tension (page
6. Install the divider plate; refer to
Plate (page
30
Removing the
22).
(Figure 46).
Figure 46
3. Bolts (4)
4. Idler pulley
Figure 47
2. Jam nut
Adjusting the Belt
26).
Installing the Divider
23).
2
3
4
G021602
(Figure
1 2
G021605