REFERENCE INFORMATION
The closer the flats on the lowering
& leveling screw get to perpendicular
with the axis of the tank return line,
the more likely the valve will lock
up in the down direction.
Up Start
Adjustment
Low Pressure
Adjustment
Up Leveling
Adjustment
Up Stop
Adjustment
Up Slowdown
Adjustment
Down Start
Adjustment
Down Stop
Adjustment
Down Slowdown
Adjustment
Lowering &
Leveling
Speed
Adjustment
Manual Lowering Valve
High Pressure
Relief Adjustment
NOTES
1. Make adjustments with the car empty.
2. Ensure system has at least 90 PSI static
pressure before adjusting.
3. Do not adjust the valve unless oil
temperature is between 80° - 110° F.
4. Do not attempt to adjust the Lowering and
Leveling Screw unless the car is moving
or resting on the buffer stands with
pressure off the lowering piston, or valve
damage may
result.
5. Leveling speed and zone adjustments are
sensitive and may require multiple attempts.
6. After completing final adjustments,
bleed the car down slightly with the
manual lowering valve to see if it levels
back up with the floor. If not, the slowdown
adjustments need to be rechecked.
ADJ. NAME
PRELIMINARY SETTINGS
Appx.
з
"
out
LOW PRESSURE
Turn CCW until screw disengages from piston, then CW
until resistance is felt, turn CCW an additional 3 turns
Turn CCW until the screw stops, then CW 2 turns
UP STOP
UP SLOWDOWN
UP START
DOWN START
Turn CW until the screw stops, then CCW 6 turns
DOWN
SLOWDOWN
Turn CW until screw stops, then CCW 5 & three-eighths turns
LOWERING &
LEVELING
Turn CW until the screw stops, then CCW 3 turns
MANUAL
LOWERING
Turn CW until the screw stops (closed)
ADJ. NAME PRELIMINARY ADJUSTMENTS
Make this adjustment before any other! Disconnect both UP solenoids (disconnect CON15 on IOF) and activate
the pump (the car should not move at this point). SLOWLY turn the Low Pressure screw CW until the car begins
to move, then CCW until it just stops. For 95 GPM pumps and lower, turn CCW an additional one-quarter turn.
For over 95 GPM pumps, turn CCW an additional one-half turn. Turn off the pump, tighten lock nut, and reconnect
both solenoids. No further adjustment is necessary on Low Pressure. Turning CW closes the regulator piston.
RELIEF
Never operate above 600 PSI! Open Manual Lowering valve slightly, shut off valve to jack line and run
the car up on Machine Room Inspection. Turn Relief screw CW to increase pressure, CCW to reduce
pressure. Close Manual Lowering valve and recheck pressure, adjust Relief screw as necessary.
Stop the run, vent pressure with the Manual Lowering valve, and open the shut off valve.
I-2
®
/I-3
®
Valve Quick Reference
This section may be used to reset the valve adjustments and start a new, complete valve setup.
FORBIDDEN
OK
RELIEF
UP LEVELING
Turn CW until the screw stops, then CCW 2 turns
Turn CW until the screw stops, then CCW 4 turns
Turn CW until the screw stops, then CCW 3 turns
Turn CW until the screw stops, then CCW 6 & one-half turns
DOWN STOP
LOW
PRESSURE
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