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Old 08-13-2015, 09:18 PM   #1
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HWH Jacks

We have a 1983 Holiday Rambler which has automatic jack. On of the jacks lifts the motor home too high by it self the others work fine. Any suggestions?
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Old 08-14-2015, 04:52 AM   #2
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Is the coach dumping the air out of the air bags lowering the coach before deploying the leveling jacks? Is the grade you are leveling on very much off level?
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Old 08-15-2015, 02:30 PM   #3
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We have been on level and unleveled ground. The first time it happened it seemed like it was going to tip the camper over. We can use the manual levelers but it you use the automatic it seems to always happen. The person I have work on the motorhome said that they work fine, however he is using it in a garage with cement floor. I can only assume that there is something wrong with that particular jack since none of the others do it.
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Old 08-15-2015, 02:50 PM   #4
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oh, I forgot to add that the air bags do dump the air out
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Old 08-16-2015, 04:32 AM   #5
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You may have a bad relay on the control board that is not opening the circuit and power is continuing to flow to that solenoid.
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Old 08-16-2015, 05:26 PM   #6
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You may have a bad relay on the control board that is not opening the circuit and power is continuing to flow to that solenoid.
So should we replace the control board?
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Old 08-16-2015, 05:48 PM   #7
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So should we replace the control board?
You need to find out what is wrong first. There is nothing wrong with the actual jack.
Either the control board, or the level sensor is bad. They are separate pieces.

How do the level lights on the panel look?
Does it indicate that your one side is low when you know it is actually level.

If the level sensor seems correct, then it is likely the board.
The pump and solenoids should be good since manual level is fine.

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Old 08-17-2015, 08:28 AM   #8
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I agree with Dan. You need to diagnose the reason the problem exists and correct that problem. I am only giving you some ideas to look into.
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Old 08-17-2015, 09:25 AM   #9
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from the description of the problem, it sounds like a bad pressure switch, on that jack. thats the small octagon piece on the side of the cylinder with one wire out the top. part number is RAP8003
do a continuity test with the jack down. if the switch is closed, it will show a ground signal. if not replace it.
if the switch is stuck open, it tells the control box that the jack is not down. that makes it extend all the way out. download a service manual and do the diagnostic test. i m sure you will find a bad pressure switch.
do not replace any part before testing. its very expensive.
if you need further help. call me at 602-549-3638.
paul maddox
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Old 08-17-2015, 05:12 PM   #10
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Thanks for your help we will try this suggestion. Hopefully that will resolve the issue
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Old 08-17-2015, 05:13 PM   #11
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I will check this to see if that works. Thanks for your suggestion
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Old 08-18-2015, 10:18 AM   #12
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Quote:
Originally Posted by azpete View Post
from the description of the problem, it sounds like a bad pressure switch, on that jack. thats the small octagon piece on the side of the cylinder with one wire out the top. part number is RAP8003
do a continuity test with the jack down. if the switch is closed, it will show a ground signal. if not replace it.
if the switch is stuck open, it tells the control box that the jack is not down. that makes it extend all the way out. download a service manual and do the diagnostic test. i m sure you will find a bad pressure switch.
do not replace any part before testing. its very expensive.
if you need further help. call me at 602-549-3638.
paul maddox
Excellect suggestion. After your post i did a search and found this HWH document.
Is it possible they have a 3-wire switch with resistors?

Electronics and HWH

Regards,

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Old 08-19-2015, 06:46 PM   #13
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thanks for the info I really appreciate it
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