M413438 81
Section 6 Adjustments
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.
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WARNING
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98. DRIVE V-BELT TENSION
Belt/Chain Models
Refer to Figure 53.
To find proper tension, apply light thumb pressure
midway between sheave and motor pulley and adjust
until the belt can be depressed approximately 1/2 inch
(13 mm).
a. Remove guard from rear of tumbler.
b. Loosen belt adjusting bolt holding idler
housing assembly to guide rails.
c. Lift idler housing assembly upward until proper
belt tension is reached, then raise and retighten
belt adjusting bolt.
d. Replace guard.
Belt/Belt Models
Refer to Figure 52.
a. Remove guard from rear of tumbler.
b. To adjust belt tension, loosen ideler housing
bolts holding idler assembly to guide rails.
c. Position housing assembly by turning adjusting
bolt until proper belt tension is reached, then
retighten idler housing bolts.
d. Replace guard on rear of tumbler.
99. DRIVE CHAIN TENSION
Refer to Figure 53.
To find proper tension, apply light thumb pressure
midway between cylinder sprocket and idler sprocket
and adjust until chain can be depressed approximately
1/2 inch (13 mm).
IMPORTANT: After tumbler has been in operation
over an extended period of time, a “HIGH POINT”
will develop on the cylinder drive sprocket from use
and wear. Turn 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 tension while slowly rotating the cylinder
sprocket manually. Chain must be at the “high
point” when making the adjustment. Refer to
Figure 53.
a. Remove guard from rear of tumbler.
b. Adjust belt first.
c. To adjust chain tension, loosen jam nut holding
idler sprocket to housing.
d. Move idler sprocket left or right until proper
chain tension is reached, then retighten the jam
nut.
e. Check chain tension.
f. Replace guard.
Adjusting the drive belt tension WILL
AFFECT drive chain tension. You MUST
check and readjust the chain tension after
adjusting belt tension.
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CAUTION