WARNING
To reduce the risk of electric shock, fire,
explosion, serious injury or death:
• Disconnect electric power to the
tumbler before servicing.
• Close gas shut-off valve to gas tumbler
before servicing.
• Close steam valve to steam tumbler
before servicing.
• Never start the tumbler with any guards/
panels removed.
• Whenever ground wires are removed
during servicing, these ground wires
must be reconnected to ensure that the
tumbler is properly grounded.
Chain Drive
Nonreversing Models
Refer to Figure 23. There is proper tension when the
chain can be depressed approximately 1/2 inch
(13 mm) by applying light thumb pressure at a point
midway between the cylinder and drive sprocket.
IMPORTANT: After a tumbler has been in
operation over an extended period of time, a "High
Point" will develop on the cylinder drive sprocket
through use and wear. Turn the sprocket manually
with drive chain in place until this "high point" is
at the top center. The "high point" can be found by
noticing increased chain tensionwhile slowly
rotating the cylinder sprocket manually.
1. Remove guard from rear of tumbler.
2. Adjust belt first.
3. To adjust chain tension, loosen jam nut holding
idler sprocket to housing.
4. Move idler sprocket left or right until proper
chain tension is reached, then retighten the jam
nut.
5. Replace the guard on rear of tumbler.
70268201
W002
© Published by permission of the copyright owner – DO NOT COPY or TRANSMIT
Belt Drive
Nonreversing Models
Refer to Figure 24. There is proper tension when the
drive V-belt can be depressed approximately 1/2 inch
(13 mm) by applying light thumb pressure at a point
midway between the sheave and motor pulley.
1. Remove guard from rear of tumbler.
2. To adjust belt tension, loosen idler housing bolts
holding idler housing assembly to the guide rails.
3. Position housing assembly by turning adjusting
bolt until proper belt tension is reached, then
retighten idler housing bolts.
4. Replace the guard on rear of tumbler.
Reversing Models
Refer to Figure 25. There is proper tension when the
drive belt can be depressed approximately 1/2 inch
(13 mm) by applying light thumb pressure
(approximately 5 pounds [2.2 kg]) at a point midway
between the sheave and motor pulley.
There is proper tension when each cylinder belt can be
depressed approximately 3/16 inch (5 mm) by applying
light thumb pressure (approximately 5 pounds) at a
point midway between the sheave and the idler.
1. Remove guard from rear of tumbler.
2. To adjust cylinder belt tension, loosen idler
housing bolts holding idler housing assembly to
the guide rails.
3. Position housing assembly by turning adjusting
bolt until proper belt tension is reached, then
retighten idler housing bolts.
NOTE: Adjusting the cylinder belt tension will
change the drive tension. Drive belt tension must
also be adjusted.
4. Loosen the locking bolt.
5. Loosen the adjusting nut and use the adjusting
screw to move the motor up or down.
6. Once proper belt tension is reached, retighten the
adjusting nut and locking bolt.
7. Replace the guard on rear of tumbler.
Adjustments
57