Final Adjustments I-2 / I-3 Valve
14 ©Vertical Express
Valve-Up Section
(continued)
Up Stop and Up Start
The up stop adjustment must be adjusted first because it affects the up start adjustment.
1. Adjust the up stop for a soft but positive stop.
2. Adjust the up start for a smooth but positive start.
3. Verify that full up speed is reached on a one-floor run, which may require the up start
to be more positive.
4. Slightly adjust the slowdown to achieve optimum performance, if necessary.
Valve-Down Section
Lowering Speed
If no speed change occurs with one full turn on the lowering speed adjuster, do
not continue to turn it out. Check for a stop open wider than a start, or a mechan-
ical piston binding.
1. Place the car on Automatic Operation.
2. Set the lowering speed.
a. Use an empty car, and turn the lowering speed adjustment in one-half
turn increments.
b. After each adjustment, leave the flat end of the screw pointed 45° to the tank
return line.
IN (CW)
Up Stop Up Start
Stop Softer Start Smoother
Start Firmer Limit High Speed
Lowering Speed
OUT
(CCW)
One-half Turn Increments
Increase Lowering Speed
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