
Ë
Check Condition of Door Seal Channel
—Be certain the sides of the channel in which the door seal
fits are straight and that mainly the inner edge is not bent. See FIGURE 3 below. Because outer edge is double
thickness it is not likely to be bent out of shape. But it is possible for the inner edge to become bent as shown.
Ë
Replace Worn Striker PLates
—Each of the outer doors are securely held in the closed position by air
latches. These air latches snap into striker plates bolted to the shell front. If the hole in these striker plates becomes
worn, the shell doors will be allowed to move while the machine is in operation. It will look as though the doors are
“breathing.” This will cause rapid wear and premature seal failure. Striker plate components are shown below.
Ë
Check Door Alignment In and Out
—Misalignment of the doors in and out of the shell front opening can
be most often attributed to worn striker plates as described above. The doors should be adjusted so that, with one
door open and one door closed, the closed door’s inflatable seal channel will be centered on the shell front sealing
surface when viewed edgewise (see FIGURE 5). If the door latch mechanism is loose, worn, or mismounted the
door can travel too far into the machine, with the result that the inflatable seal can protrude past the door channel
and the shell front sealing surface and be scissored when the door is reopened.
Ë
Check Seal Air Pressure
—Air pressure on these inflatable door seals should be set and maintained at 25
to 28 PSI. Too high air pressure will cause blowouts and too low air pressure will cause not enough contact between
seal and shell front, thus movement and rapid wear. Kit K28 0011, which contains a fixed at 25 to 28 PSI regulator,
plus a pressure gauge is available from the Milnor
®
factory. If yours is inoperative, it should be replaced.
Ë
Check Door Bumper
—Be sure large rubber bumper (part number 60C075) on right hand door is in place and
not worn.
Ê
Seal Vacuum Pump Feature
Since approximately June of 1980, all production machines have a vacuum pump which delays the opening of
the door by 7.5 seconds and during that time literally sucks the air from the inflatable door seal. This is the single
greatest extender of the life of the inflatable door seal. This feature is retrofitable to all 60" and 72" WE2 machines
manufactured prior to June 1980. Order retrofit kit, part number K28 0013.
Double
Thickness
Abnormal Inflated Condition
Normal Inflated
Bent Retaining
Channel
Î
FIGURE 3
(MSSMA413AE)
Î
Door Alignment
Lower Door
Striker Plate
03 06209
72" Rapid Load 2-Pocket Only
Nylon
Bushing
02 18954
Right 02 18978
Left 02 18953
Upper Door Striker Plate
60" + 72" Rapid Load 2-Pocket
Î
FIGURE 4
(MSSMA413AE)
Î
Worn Striker Plate
WRONG: Door Too Far In
Shell Front
Normal Inflated Condition
WRONG: Door Too Far Out
Shell Front Opening
Normal Deflated
Î
FIGURE 5
(MSSMA413AE)
Î
Door Seals
Summary of Contents for 72044 WP2
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Page 23: ...Section 1 Service and Maintenance ...
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Page 65: ...Section 2 Shell and Door Assemblies ...
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Page 79: ...Section 3 Drive Assemblies ...
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Page 111: ...Section 4 Bearing Assemblies ...
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Page 125: ...Section 5 Frame Pivots and Suspension ...
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Page 147: ...Section 6 Control and Sensing Devices ...
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Page 153: ...Section 7 Chemical Supply Devices ...
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Page 159: ...Section 8 Water and Steam Piping and Assemblies ...
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Page 179: ...Section 9 Pneumatic Piping and Assemblies ...
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