1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com
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THE INFORMATION PRESENTED HEREIN IS FOR USE BY SKILLED HYDRAULIC ELEVATOR PROFESSIONALS
SPECIAL CONSIDERATIONS:
Make all adjustments at minimum pressure (no load on elevator) except where noted. “IN” is ALWAYS (CW) clockwise. “OUT” is ALWAYS
(CCW) counterclockwise. THE CONTROL PLATE ADJUSTERS HAVE SEAL NUTS, NOT LOCK NUTS. Adjust nut only to set seal friction
(friction will maintain adjustment). When adjustment procedure calls for coils to be disconnected, disconnect them electrically. Do not remove
them physically. Make adjustments with a minimum oil temperature of 80˚ F, not to exceed 100˚ F maximum. Maxton recommends the use of
a 5 micron filtration system. With the presence of at least some adverse conditions in most installations, serious consideration should be given
to overhaul or replacement of a control valve on a five year cycle.
GAUGE PORTS:
Gauge ports - 1/8” NPT provided at points A, B and S.
A Port: Pump pressure (RELIEF, WORKING PRESSURE).
B Port: Jack pressure (STATIC, DOWN RUNNING).
S Port: Low pressure switch port.
Note: The minimum operating pressure at port B should be at
least 50 psi (3.4 bar) as car is moving down full speed with no
load. See flow chart.
OPERATIONAL DATA:
Min. / Max. Pressure:
Max. Rated Flow:
Operating Temperature:
Optimal Temp. Range.
Oil Type:
50-800 psi (3.4-55 bar)
185 gpm (700 l / min.)
80˚-150˚ F (26˚- 65˚ C)
100˚-130˚ F (38˚- 54˚ C)
Hyd. ISO VG 32
150 SUS @ 100˚ F (38˚ C)
* SAFETACH2 performance meter validates valve adjustment by providing
direct speed and acceleration (g-force) readouts.
Questions: Call Tech Support (775) 782-1700 (7am-4pm PST), use
ADJUSTMENT PROCEDURE UC4, UC4M B44
1 BPS
Disconnect the US coil, turn UA IN (CW) register an up call and
turn BPS IN (CW) until the car just moves. Next, turn the BPS
adjuster OUT (CCW) until it stops the movement of the car, then
OUT 1/ 2 turn more. Snug lock nut on BPS adjuster and stop
pump. NOTE: If car does not move with BPS fully IN (CW), the
valve may be oversized for the job (consult factory for proper valve
sizing). Reconnect the US coil.
2 UA
Register an up call (pump running, U & US coils energized, car should
not move), slowly turn UA OUT (CCW) to attain
full up speed within 24 to 36 inches. * (Accel 0.04g-0.09g).
3 UL
Disconnect the U coil. Turn UL adjuster IN (CW) to stop and
register an up call. Leveling speed should be 3 to 5 fpm. (If not,
readjust LS*). Turn UL adjuster OUT (CCW) to attain 9 to 12 fpm
leveling speed. Reconnect the U coil and lower the car to lowest
landing. *(Read leveling speed).
4 UT
Register an up call and turn UT IN (CW) so that the car slows to
provide 4 to 6 inches of stabilized up leveling. Repeat steps 3 and
4 as necessary. *(Decel 0.04g-0.09g).
5 US
With US adjuster fully OUT (CCW), car should stop 1/4" to 3/8"
below floor. After a normal up run, turn US IN (CW) as needed to
bring car to floor level. The pump must be timed to run ½ second
after the car has reached the floor.
6
With empty car at bottom floor, disconnect U & US coils and
register a call. The car must not move. If movement occurs, check
BPS and US.
LS* Dot on the LS adjuster should be referenced to the line between
F / S. When necessary, disconnect the U coil and turn the UL adjuster
IN (CW) to stop. Unlock the LS adjuster by loosening the screw next
to the symbol 1 turn. Move the LS adjuster slightly toward S for
slower or F for faster leveling speeds. Set adjustment from 3 to 5 fpm
with the LS adjuster, tighten locking screw down, verify LS speed after
tightening screw, then repeat step 3.
* (Level Speed Test 3 to 5 fpm).
7 D
Register a down call to set proper down speed with down
speed adjuster D as required. Tighten the lock nut (snug)
& send car to upper landing. *(Read high speed).
8 DA
Start by turning DA adjusters IN (CW) to stop.
Register a down call and, turn the DA adjuster slowly OUT
(CCW) until the car accelerates smoothly. Send car to
upper landing. *(Accel. 0.04g-0.09g).
9 DT
Register a down call and turn DT IN (CW) so that the car
slows to provide 4 to 6 inches of stabilized down leveling.
*(Decel 0.04g-0.09g).
10 DL
Disconnect D coil. Register a down call and set down
leveling speed at 6 to 9 fpm with the DL adjuster. Tighten
the lock nut (snug). Reconnect D coil.
* (leveling speed 6 to 9 fpm).
11 DS
Turn DS IN (CW), when necessary, for a softer stop.
ML
MANUAL LOWERING: Turn ML screw OUT (CCW) to
lower car downward at leveling speed when necessary.
R
RELIEF:
A. Land car in pit and install pressure gauge in A port.
B. Register an up call with a fully loaded car, making
note of Maximum operating pressure.
C. Turn UA and RELIEF adjuster OUT (CCW) to stop.
D. Close the manual shut off valve to the jack.
E. Register an up call, observe pressure gauge and turn
RELIEF IN (CW) to increase pressure. Final setting
should be in accordance with local code requirement
not to exceed 150% of maximum operating pressure.
F. Tighten the lock nut (snug).
G. Restart to check the pressure relief setting. Seal as
required .
H. Open the manual shut off valve to the jack.
I. Readjust UA for proper Up Acceleration.
*(Accel 0.04g-0.09g).
DEFAULT SETTINGS
If valve is received from Maxton, only minor adjustments may be required.
CONTROL PLATE
US UP STOP OUT (CCW) to stop (faster rate)
UL UP LEVEL IN (CW) to stop (slower rate)
UA UP ACCELERATION IN (CW) to stop (slower rate)
UT UP TRANSITION OUT (CCW) to stop (faster rate)
VALVE BODY
BPS BY-PASS SIZING OUT (CCW) to stop (delays up start)
LS LEVEL SPEED (factory set) DOT ON LINE
(set 3-5 fpm)
R RELIEF APPROX 450 psi (CW increases pressure)
DEFAULT SETTINGS
If valve is received from Maxton, only minor adjustments may be required.
CONTROL PLATE
DT DOWN TRANSITION OUT (CCW) to stop (faster rate)
DA DOWN ACCELERATION OUT (CCW) to stop (faster rate)
DS DOWN STOP OUT (CCW) to stop (faster rate)
ML MANUAL LOWERING IN (CW) to stop
VALVE BODY
D DOWN SPEED Turn OUT (CCW) 5 threads above lock nut. (faster speed)
DL DOWN LEVEL Turn OUT (CCW) 2 threads above lock nut. (faster speed)
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