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09-11-2022, 01:59 AM
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#1
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Junior Member
Brand: Thor Motor Coach
State: Ontario
Posts: 6
THOR #27943
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Constant levelling jack issues
So I have a 2011 Thor Windsport 32A.
I bought it with levelling jacks that sounded awful, and they worked for about 3 weeks then stopped and the motor was dead.
I bought a replacement motor for the lippert one from Western motorworks in Illinois and installed it which took about 10 mins tops. Motor sounded super smooth and jacks extended great right away. After the first retraction the front left valve started leaking. Replaced that, and the leak stopped.
Tested the system again, and the jacks extended great, then I hit to retract, and they started to come back in but about 40 seconds in, the motor started to whine horribly. I hit the power button to stop the retraction, and walked outside. The motor was so hot you couldn't touch it, and smelled like burning. It was completely cooked and would not start again.
Called Western motor and they sent a replacement saying it's slightly possible I got a lemon. I installed it, and tried it, the motor spins fine and sounds fine, but the jacks do not move at all. Not up nor down.
1) Running the RV, batteries read 13.15V roughly.
2) Doing an auto or manual extend, none of the 4 jacks moved. All valves are at the full clockwise position (closed).
3) Tried also extending and retracting with valve counter-clockwise (open), and doesn't do anything.
4) Tried with the 2 wire connector disconnected and also nothing.
I've read the system is supposed to auto-bleed but it seems to me like there is an issue with air in the lines. The new motor when spinning doesn't heat up at all btw.
Thanks.
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09-11-2022, 11:38 AM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: Tuscany 42GX
State: Missouri
Posts: 1,158
THOR #9178
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You may have a bad pump
Is the motor/pump coupled properly?
Your system have a hydraulic filter?
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09-11-2022, 02:49 PM
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#3
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Junior Member
Brand: Thor Motor Coach
State: Ontario
Posts: 6
THOR #27943
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Quote:
Originally Posted by lwmcguir
You may have a bad pump
Is the motor/pump coupled properly?
Your system have a hydraulic filter?
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I took the motor off the pump and decoupled and it’s fine so that’s not the issue.
How do you test if the pump is bad or not?
I don’t think I have a hydraulic filter anywhere.
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09-11-2022, 02:51 PM
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#4
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Senior Member
Brand: Thor Motor Coach
Model: 2011 FW Hurricane 33T
State: England
Posts: 1,280
THOR #16471
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Quote:
Originally Posted by lwmcguir
Is the motor/pump coupled properly?
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I wondered too... did the coupler get re-installed?
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09-11-2022, 03:20 PM
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#5
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Junior Member
Brand: Thor Motor Coach
State: Ontario
Posts: 6
THOR #27943
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Quote:
Originally Posted by OldWEB
I wondered too... did the coupler get re-installed?
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Sorry that was an auto correct there is no coupler. The motor just has a flat spade/slot female side that hooks into the pump slot male side. Dry simple setup but it just seems like it can’t get any pressure now.
Is there some way to manually bleed air out of the system?
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09-11-2022, 05:49 PM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: 2011 FW Hurricane 33T
State: England
Posts: 1,280
THOR #16471
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Quote:
Originally Posted by jonas007
Sorry that was an auto correct there is no coupler. The motor just has a flat spade/slot female side that hooks into the pump slot male side. Dry simple setup but it just seems like it can’t get any pressure now.
Is there some way to manually bleed air out of the system?
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My jack system has this style of motor that requires a coupler as the motor shaft would never reach the pump shaft.
**Sizes are NOT to scale**
To "bleed out" the air, you just run the system, the pump is "built in" the tank so should have fluid.
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09-11-2022, 07:13 PM
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#7
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,116
THOR #7035
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The pump won't bleed unless the hydraulic valves are opening. The fact that you have burned out 2, maybe 3 motors tells me you need to check the solenoid operation. This can easily be done by disconnecting the + 12 VDC lead to the pump and try to operate the system and check the solenoids by sound and voltage applied with a voltmeter. Probably need two people to do this.
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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09-11-2022, 09:39 PM
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#8
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Junior Member
Brand: Thor Motor Coach
State: Ontario
Posts: 6
THOR #27943
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Quote:
Originally Posted by 16ACE27
The pump won't bleed unless the hydraulic valves are opening. The fact that you have burned out 2, maybe 3 motors tells me you need to check the solenoid operation. This can easily be done by disconnecting the + 12 VDC lead to the pump and try to operate the system and check the solenoids by sound and voltage applied with a voltmeter. Probably need two people to do this.
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Can you explain in more detail how to do this? I’m not understanding what I’m checking for with the voltmeter and when.
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09-11-2022, 10:17 PM
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#9
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,116
THOR #7035
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Quote:
Originally Posted by jonas007
Can you explain in more detail how to do this? I’m not understanding what I’m checking for with the voltmeter and when.
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Assuming you know how to use a multimeter:
There are 5 solenoid operated valves on most Lippert leveling systems:
4 to allow hydraulic pressure to the top of the hydraulic rams to raise the coach. These are operated in pairs.
One reversing valve to pressurize the bottom of all leveler's rams to retract the rams.
A voltmeter will see if 12 VDC is applied to each of these solenoids when it is supposed to be.
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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09-12-2022, 01:59 PM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: 37LS outlaw
State: New Jersey
Posts: 516
THOR #5248
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I’m betting that the pump impeller went bad. That’s the reason you toasted the second pump. Last year I helped a friend that had the same problem, motor ran, no pressure. It was the pump
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09-13-2022, 12:25 AM
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#11
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Senior Member
Brand: Thor Motor Coach
Model: Tuscany 42GX
State: Missouri
Posts: 1,158
THOR #9178
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I think Ace is right and it will take two people
I would also break the fittings to verify flow as well as solenoid operation
If the pump is spinning and not loading up either the suction has air in leakage or the impeller is shot
You coulhave lost prime and breaking the fittings might help
You have a project
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09-13-2022, 09:04 PM
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#12
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Junior Member
Brand: Thor Motor Coach
State: Ontario
Posts: 6
THOR #27943
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Quote:
Originally Posted by Trkyte@msn.com
I’m betting that the pump impeller went bad. That’s the reason you toasted the second pump. Last year I helped a friend that had the same problem, motor ran, no pressure. It was the pump
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Is it possible to just replace the impeller or do I need the whole unit?
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09-13-2022, 09:07 PM
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#13
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,116
THOR #7035
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Quote:
Originally Posted by jonas007
Is it possible to just replace the impeller or do I need the whole unit?
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Probably the whole unit. But what troubleshooting have you done to confirm the pump is bad? Or are you just loading the parts canon?
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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09-13-2022, 11:38 PM
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#14
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Junior Member
Brand: Thor Motor Coach
State: Ontario
Posts: 6
THOR #27943
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Quote:
Originally Posted by 16ACE27
Probably the whole unit. But what troubleshooting have you done to confirm the pump is bad? Or are you just loading the parts canon?
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I’ve reinstalled the motor twice, checked voltages and it’s spinning fine.
I’ve tried manually turning the motor clockwise and jacks don’t come down at all. What else should I check?
__________________
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09-13-2022, 11:57 PM
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#15
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,116
THOR #7035
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Quote:
Originally Posted by jonas007
I’ve reinstalled the motor twice, checked voltages and it’s spinning fine.
I’ve tried manually turning the motor clockwise and jacks don’t come down at all. What else should I check?
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Posts # 7 and #9.
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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