Service manual

56 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
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
67. IDLER SPROCKET
Nonreversing Tumblers
Refer to Figure 32.
a. Support drive guard and remove screws
holding guard to rear of tumbler. Refer to
Figure 28.
b. Remove chain from idler sprocket.
c. Remove jam nut and sprocket from bolt. Refer
to Figure 30.
d. Reinstall chain and drive guard.
NOTE: After installing chain and sprocket, adjust
chain. Refer to Adjustments Section.
68. SHEAVE
Refer to Figure 30 and/or Figure 31.
a. Remove drive belt.
b. Loosen jam nut on chain idler sprocket and
move idler sprocket to the right. (Nonreversing
tumblers only).
c. Run chain off drive sprocket or belt off upper
sheave.
d. While supporting idler housing, remove the
upper and lower bolts, nuts, and lockwashers
holding guide rails to trunnion housing and
motor bracket.
e. Remove the sheave, guide rails and idler
housing as an assembly from the rear of the
tumbler.
f. Remove snap ring from idler shaft.
(Nonreversing models only).
g. Loosen two setscrews holding sheave to idler
shaft and pull sheave off idler shaft.
h. Remove key from shaft keyway.
IMPORTANT: Reassemble sheave to idler shaft.
On nonreversing tumblers, run sheave out until it
butts against snap ring. Make sure that shaft key is
correctly positioned under setscrew. Tighten
setscrew above key first, then tighten other setscrew.
IMPORTANT: Nonreversing Tumblers — Realign
motor pulley directly under sheave by loosening
drive motor mounting screws and repositioning
motor on mounting bracket.
IMPORTANT: Reversing Tumblers — Realign
motor pulley directly over sheave by loosening drive
motor mounting screws and repositioning motor on
mounting bracket.
69. DRIVE SPROCKET/PULLEY
Refer to Figure 32.
a. Remove chain.
b. Loosen setscrews holding drive sprocket/pulley
to idler shaft and pull sprocket/pulley free.
c. Remove key from shaft keyway.
d. Reinstall chain and belt and drive guard.
IMPORTANT: Reassemble sprocket or pulley to
idler shaft. Align with cylinder sprocket or sheave.
Make sure shaft key is positioned under one of the
setscrews. Tighten setscrew over key first, then
tighten the other setscrew.
70. IDLER SHAFT
Refer to Figure 32.
a. Remove idler housing assembly.
b. Remove sheave and drive sprocket or pulley.
c. Remove bolt holding idler housing to guide
rails.
d. Support idler housing assembly and carefully
drive idler shaft from housing with a hammer
and a hardwood dowel.
e. Support idler housing assembly and remove
bearings from housing with a hammer and a
hardwood dowel.
f. Reinstall shaft and bearings.
IMPORTANT: When installing new bearings, apply
a film of bearing retaining compound to the bearing
cavity surfaces of the housing and the outside
diameter of the bearings.
IMPORTANT: If a press is not available to install
bearings, carefully tap bearings into housing.
g. Reinstall drive guard.
NOTE: After installing sheave, adjust belt, then
adjust chain. Refer to Adjustments Section.