Milnor 72044 WP2, Service, Page: 84 / 202

the motor position with the motor mount (or other component) jack screws until all slack is taken up. Do
not force belts onto the sheaves by using a pry bar or rolling the sheaves.
6. Check for sheave alignment as shown in FIGURES 3. The sheaves must be aligned within 1/64" per foot be-
tween shaft centerlines and in no case greater than 1/8". Readjust the sheave position as required to correct
alignment.
7. Continue to alternately and progressively tighten cap screws to the “Final Torque” shown in the table. Use a
torque wrench for the final torque check. When properly mounted, the gap between the bushing flange
should not be less than .078" nor more than .130".
8. Check for proper belt tension and adjust if required. See “V-BELT TENSION ADJUSTMENTS” (see Table
of Contents).
Ï Taperlock Bushing Bolt Torque Specifications
Size Code
(Stamped on bushing)
Bolt Size
(All National Coarse Thread)
Initial torque
(in lb.)
Final torque
(in lb.)
G 1/4 x 5/8 48 115
H 1/4 x 3/4 48 115
P
1
5/16 x 1 96 240
P
2
5/16 x 1 96 240
Q
1
3/8 x 1 1/4 174 430
Q
2
3/8 x 1 1/4 174 430
R
1
3/8 x 1 3/4 174 430
R
2
3/8 x 1 3/4 174 430
S
1
1/2 x 2 1/4 420 1080
S
2
1/2 x 2 1/4 420 1080
SH 1/4 x 1 3/8 54 115
SDS 1/4 x 1 3/8 54 115
SD 1/4 x 1 7/8 54 115
SK 5/16 x 2 90 240
SF 3/8 x 2 180 430
M 3/4 x 6 3/4 1350 3700
Ê Gear Reducer and Clutch
For gear reducer part numbers, see Gear Reducer Assembly and Reducer Air Seal drawings for your machine.
For clutch components, see Drive Assembly drawing for your machine.
Ë Concept of Clutch Operation
—The clutch (see cross section view, next page) consists of a tubeless tire
mounted to the gear reducer output shaft and a drum similar to an automobile brake drum, mounted to the jackshaft
(or E2 motor shaft), within which the tire nests. When the tire is automatically inflated on command from the
machine controls, it grips the inside of the drum, thus engaging the gear reducer and the jackshaft. When air pressure
is released, the tire deflates, thus disengaging the gear reducer and jackshaft and allowing the machine to run in
extract without overspeeding the reducer, wash motor or drain motor.
Air controlled by a solenoid valve is admitted to the clutch through a hole in the center of the gear reducer
shaft. The air is prevented from entering the reducer housing itself by a mechanical end face seal located inside the
air inlet on the gear reducer. The reducer is also fitted with a vented fill plug to prevent build up of air pressure in
the housing, should the mechanical seal fail. A quick release valve permits instant clutch release by providing a large
area “short circuit” exhaust connection near the clutch. The quick release valve is necessary for the clutch used on
Milnor
®
washer-extractors, and is furnished as original equipment. The air supplied to the clutch must be free of oil
and moisture.
If the machine makes a loud screeching sound like skidding automobile tires during decel-
eration from extract speed to wash speed, turn the Master switch to off immediately and
refer to the troubleshooting procedures.
Ë Alignment Requirements
—The gear reducer must be posi-
tioned on the drive base such that its output shaft is on the same axis
as the jackshaft (or E2 motor shaft), as shown in FIGURE 4. Other-
wise, the clutch tire will not properly engage the drum. Slight mis-
alignment reduces the service life of the clutch tire and perhaps other
components. Severe misalignment may result in serious damage to
the jackshaft, clutch, or gear reducer (i.e., broken shaft).
Ë To Remove the Gear Reducer and Clutch
1. Remove all belts from the gear reducer and clutch drum pulleys
as previously explained.
2. Remove the air line to the quick release valve located on the re-
ducer air seal.
3. Remove any other components which may be mounted to the
gear reducer mounting bracket, such as Autospot motor, brake
assembly, etc.
4. On all machines except 64" models, shims are used under the
gear reducer mounting bracket, to align the gear reducer.
Reducer
output
shaft
Clutch
tire
Clutch
drum
Air-line
to clutch
Jackshaft
(or E2 mo-
tor shaft)
Brake drum (42"
and 48" machines
Î FIGURE 4
(MSSMA407BE)
Î Cross Section View of Clutch