Service manual

52 M411433
Section 5 Service Procedures
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.
W002
WARNING
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63. DRIVE GUARD
Refer to Figure 28.
a. Support drive guard and remove screws
holding guard to rear of tumbler.
b. Reinstall drive guard.
64. DRIVE BELT
Nonreversing Tumblers
Refer to Figure 30.
a. Support drive guard and remove screws
holding guard to rear of tumbler. Refer to
Figure 28.
b. Remove two screws holding belt guard
assembly to motor bracket. Remove belt guard.
Refer to Figure 29.
c. Remove chain. Refer to Paragraph 65.
d. Loosen nut on idler housing attaching bolt.
Drop idler housing to bottom of slots.
e. Remove lower bolt and nut from guide rail.
Hinge guide rail out and slip belt out from
under guide rails.
f. Slip new belt under guide rail and onto sheave,
and motor pulley.
NOTE: After reinstalling belt and chain, adjust
belt, then adjust chain. Refer to Adjustments
Section.
Reversing Tumblers
Refer to Figure 31.
a. Support chain guard and remove screws
holding guard to rear of tumbler. Refer to
Figure 28.
b. Disconnect electrical service to the tumbler.
c. Support chain guard and remove the screws
holding it to the back panel of the tumbler.
Leave the belt guard attached to the top of the
drive guard.
d. Loosen four capscrews holding motor
mounting bracket to side brackets. Lower
motor and mounting bracket until holding
capscrews bottom in the mounting slots.
e. Slip drive belt off motor pulley.
f. Slip drive belt off sheave, and remove drive belt
by working it over the top of the guide rails.
g. Slip new belt onto sheave and motor pulley.
Adjust belt tension. Refer to Adjustments
Section.
Figure 29
SCREWS
BELT
GUARD
TU039-SV