200 Series HWH leveling jack Pump won't stop
Hi All, I have the joystick operated kickdown leveling jacks. I extended the jacks and the pump cycled as expected. But this time, the pump did not stop. Not sure what happened but even though I re...
Forum Discussion
Thorshegoes wrote:
Hi Doug, are you sure about the continuous duty relay? I've read in numerous posts and even from HWH documents that the joystick operated/hydraulic operated pump relays are intermittent. See below from HWH.
There are two different types of relays used on the
hydraulic pump motors, a continuous duty and an intermittent duty relay. The continuous duty relay is only
used with automatic, computerized systems. This relay is called the master relay. Systems that do not use a
hydraulic pump may have a master relay. It may be mounted in a control box or remote from the control box.
System diagrams or schematics will supply this information. The intermittent duty relay is called the pump
relay and is used with any system that has a hydraulic pump motor. The relay used on air compressor
assemblies is a continuous duty relay. All three of these relays have normally open contacts. The coil of all
pump and air compressor relays is controlled with a + signal except for the pump relay on 400 series leveling
systems and 200 series Joystick leveling systems. A switched ground controls these relays. Safety and other
relays may be controlled by either a + voltage or ground signal. You should always check system diagrams
and/or schematics to determine the control signal for a relay
I should have mentioned, you are correct per HWH, But, by continous duty, I meant the ability to run continous HIGH AMP dc current thru the relay contacs. The systems HWH talks about when you have the 2 Solenoids(relays) is the FIRST solenoid is the continous duty which stays on almost all the time when the Computerized system is activated. This is a LOW amp draw solenoid. The other Relay (2nd) is like yours which sends the HIGH AMP dc current to the Pump motor. I should have stated HI AMP draw solenoid instead of continous duty. Not all solenoids that look the same have the ability to run HI AMP draw thru it continously. Most Automotive part stores will not have the type solenoid you need. Grainger will usually have the type you need. RAP35723 is the solenoid you need. Doug
