Krystal Enterprises
46
Air Operated - Single Plug Door
Air Door Speed Adjustment Procedure
1. Remove the air motor cover located in the stepwell.
2. Using the photo on this page, identify the speed control valves. Using a 3/8” wrench, loosen the locknuts on both valves.
3. Operate the door and adjust both valves until the opening and closing speeds are equal and acceptable. Then tighten both
locknuts.
4. Using a fl at blade screwdriver, adjust the opening and closing cushioning valves on the air motor, then replace cover.
Single Plug Door System
(door shown partially open)
Secondary Entry Door
Switch - used on air
operated door systems,
located on passenger
door post
Closing
Speed
Valve
Opening
Speed
Valve
4-Way
Valve
Closing
Cushioning
Valve
Opening
Cushioning
Valve
CAUTION!
Never attempt adjustment of
the Boomerang Arm, call KRYSTAL SERVICE
Entry Door
Ajar Switch
Summary of Contents for Econline Super Duty Chassis 450 1998 Series
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