1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com
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DL
D
B
A
BPS
R
DSR
PUMP
PRESSURE
“A” PORT
COIL
COVER
SYSTEM
PRESSURE
(JACK)
“B” PORT
PUMP
Front View
US
D
DL
U
SERIAL #
*DOWN STRAINER
*UP STRAINER
SOLENOIDS
(UNDER)
COVER
Top View
* Strainer access is provided from the top of the control plate.
Prior to 2012 the sleeve and baseplate were an integral part of coil operation.
2012 to current the C-Frame is an integral part of coil operation.
ELECTRO-MAGNETIC COILS
U = UP COIL D = DOWN COIL
US = UP STOP COIL DL = DOWN LEVEL COIL
ATTENTION: All Maxton Valves MUST be installed with the solenoids in the upright (vertical) position.
When replacing a Maxton UC3 / UC3AM or UC4 / UC4M series valve, pump flange assembly
must also be replaced. It is subject to the same wear and tear as the valve.
COIL OPERATING SEQUENCE
US For up travel, energize when pump starts and de-energize to stop. With US energized and pump running, car will move up at leveling
speed. For “soft stop”, pump should run ½ second after US de-energizes.
U Energize with US coil to run up at contract speed. De-energize at slowdown distance from floor. Slowdown distance = 2 inches for each
10 fpm of car speed NOT to exceed 6 inches for every 25 fpm of car speed. If necessary increase slowdown distance to achieve 4-6
inches of stabilized up leveling.
DL Energize to move car at leveling speed. De-energize to stop.
D Energize with DL coil to run down at contract speed. De-energize at slowdown distance from floor. Slowdown distance = 2 inches for
each 10 fpm NOT to exceed 6 inches for every 25 fpm of car speed. If necessary increase slowdown distance to achieve 4-6 inches
of stabilized down leveling.
CAUTION: On Wye - Delta Up Start do not energize U and US Coils until motor is running on Delta.
With soft starter, energize US coil with motor up to speed signal.
ADJUSTMENT PROCEDURE UC4MR B44
J
T
LOW
PRESSURE
SWITCH
“S” PORT
SERIAL #
ML
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