Valve Final Adjustments
* If the valve locks up in the down direction due to the orientation of the flats on the lowering and leveling screw, run the car
up and change the orientation of the screw 90° while the car is moving to restore function.
Adjustment Effect On Performance
Notes
No. Name CW CCW
1
Down Stop
Softer stop, firmer
start, faster leveling
Firmer stop, softer
start, slower leveling
Set first then leave alone. Affects other Down adjustments.
Up Stop
Softer stop,
firmer start
Firmer stop,
softer start
Set before Up Start. Too soft will allow car to overshoot.
2
Down Start
Must be more open (CCW) than Down Stop. Increase
CCW if full speed cannot be achieved on one-floor run.
Must be more open (CCW) than Up Stop. Increase
CCW if full speed cannot be achieved on one-floor run.
3
Reduce fast
lowering speed
Adjust in roughly one-half turn increments.
Up Fast
4
Lowering &
Leveling*
Reduce leveling speed
Increase leveling speed
Adjust in less than one-eighth turn increments. Hold screw
to tighten locknut so settings don’t change. Very sensitive.
Up Leveling
May affect UP Slowdown.
5
Down
Slowdown
Up
Slowdown
Very sensit
ive. More CCW gives more abrupt slowdown.
Affects Up Leveling.
Travel (Up or Down)
Speed
Recommended Adjusting Order: Adjustment 1, 2, 3, 4, 5 on DOWN side, then Adjustment 1, 2, 3, 4, 5 on UP side.
Typical Performance Curve
Adjustment 2
Starting Acceleration
This is a quick reference for the I-2/I-3 Valve for use by experienced mechanics.
See the I-2/I-3 Valve component manual for procedure and troubleshooting information.
Adjustment 3
Fast Speed
Adjustment 4
Leveling Speed
Set at 10-12 FPM
Adjustment 1
Deceleration to Full Stop
Adjustment 5
Deceleration to Leveling Speed
Adjustment 5
Leveling Zone
Set at 3"-4"
Lowering &
Leveling*
More abrupt start
Softer start
Up Start
Softer start
More abrupt start
N/A No adjustment. Set by pump capacity.
Increase leveling speed,
softer slowdown
Decrease leveling speed,
firmer slowdown
Increase leveling zone,
firmer slowdown
Increase fast
lowering speed
Decrease leveling zone,
softer slowdown
Decrease leveling zone,
softer slowdown,
increase leveling speed
Increase leveling zone,
firmer slowdown,
decrease leveling speed
N/A
Very sensitive. Must find "sweet spot" of about one-eighth
turn range to affect adjustment. Affects Down Leveling.
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