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1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 [email protected] www.maxtonvalve.com
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\\SERVER\CATALOG 2019\2019 Catalog Rev 2
CAUTION:
The information contained herein is for use by skilled hydraulic elevator professionals.
Before disassembly of the valve, make sure the power is off by turning the main disconnect
switch off and that the elevator is resting on the buffers (zero system pressure).
UP SECTION
PUMP RUNS, CAR DOES NOT MOVE
Check valve for proper sizing in accord with adjustment procedures.
Make sure gate valves are open in system as required.
Turn US (Up Stop) adjuster in clockwise (CW) until it stops.
1.
If car moves, check for proper voltage to coils.
2.
If voltage is correct, remove US solenoid assembly. Visually inspect parts for foreign
material and / or damage. Ball Cage must operate freely within the solenoid tube.
3.
Replace solenoid seat.
4.
Remove transfer line. Check up control fluid strainer on the end of the transfer line for lint. If
clogged remove debris (in this case oil in the system must be filtered)
.
If car does not move, remove valve closure. Examine bypass piston ring for damage.
SLOW UP ACCELERATION
Turn UA (Up Acceleration) adjuster out counterclockwise (CCW).
Check relief valve for proper setting. Refer to adjustment procedures.
Check belts and pulleys on pump and motor to make sure they are not slipping.
Check motor for proper HP rating and line voltage for excessive voltage drop.
Remove transfer line. Check up control fluid strainer on the end of the transfer line for lint. If clogged
remove debris (in this case oil in the system must be filtered)
.
Remove valve closure. Examine bypass piston ring for damage.
Turn UT (Up Transition) and US (Up Stop) adjusters in (CW) fully. If car then accelerates
properly, check both U and US solenoid assemblies for damage to seats, debris and free
movement of Ball Cage.
UP ACCELERATION ROUGH
Check jack packing and guide shoes for excessive tightness.
Check valve for proper sizing.
Turn US (Up Stop) and UT (Up Transition) adjusters in (CW) fully (count the number of
turns to avoid lengthy readjustment).
1.
Register an up call; if problem continues replace BPS adjuster.
2.
If car accelerates properly, or stalls in BPS sizing operation, either the US or UT ball check
assembly must be replaced. Turn either US or UT adjuster out (CCW) one at a time and
register an up call. When valve does not respond properly, replace respective ball check
assembly or consult MAXTON regarding replacement.
TROUBLE SHOOTING PROCEDURES
UC4, UC4M, UC4MR
B44
Содержание EMV10
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