1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com
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ADJUSTMENT PROCEDURE UC4MR B44
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 175 psi (12 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:
175-800 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
Maxtonvalve.com or download Maxton Mobile Mechanic from your APP Store
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 DSR
Register a down call and turn DSR OUT (CCW) until the car
reaches approx. 5% above contract speed. NOTE: You may
need to turn DT IN (CW) until the car begins down acceleration.
In order to achieve desired speed, D may need to be turn OUT
(CCW).
8 D
Register a down call to set your actual contract speed with D
adjuster (CW slower). Tighten the lock nut (snug) & send car to
upper landing. *(Read high speed).
9 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 tight). Reconnect D coil. * (leveling speed 6 to 9 fpm).
10 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. NOTE: A minor
re-adjustment of DL may be necessary. Send car to upper
landing. * (Decel 0.04g-0.09g).
11 DA
Turn DA IN (CW) until desired rate of acceleration is achieved.
Full down speed should be attained within 24 to 36 inches. *
(Accel 0.04-0.09g).
ML
MANUAL LOWERING: Push ML button 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)
ML MANUAL LOWERING
VALVE BODY
D DOWN SPEED Turn OUT (CCW) 9 threads above lock nut.
(faster speed)
DL DOWN LEVEL Turn OUT (CCW) 2 threads above lock nut.
(faster speed)
Push Button
DSR DOWN SPEED REGULATOR Turn IN (CW) 1 thread above jam nut
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