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01-18-2025, 12:10 PM
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#1
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Junior Member
Tiffin Owners Club
Join Date: Oct 2022
Posts: 20
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2015 Tiffin allegro bus 450P level system failure
2015 Tiffin allegro bus 45OP Leveling System failure
Going on eight weeks now, trying to diagnose the system when hydraulically leveled and sitting in the campground if you turn the key on the Leveling System jacks retract and the bus drops down freightliner Valid Tiffin all going round round and round I’ve replaced the hydraulic pump, module the keypad and I’m still sitting stranded and cannot drive the bus anywhere for service There is no mobile mechanic that I know of within hundreds of miles of here. I’m in Wisconsin there isn’t a certified Tiffin place anywhere and it’s turned into a real nightmare. Can anybody help? Has anyone seen this issue before?
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01-18-2025, 01:27 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 34,185
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I'm a little confused  .
Are you saying the levelers retract automatically when the ignition key is turned on , and the engine won't start to air up the suspension , so the coach can be driven ?
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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01-18-2025, 01:36 PM
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#3
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Junior Member
Tiffin Owners Club
Join Date: Oct 2022
Posts: 20
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It will air up eventually after the air builds back up, but it should not drop down just by turning the ignition on or starting the bus. Something could be under a slide out. A person could be under the bus. Anything when you turn the key on it should stay Level and not move.
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01-18-2025, 02:21 PM
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#4
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 34,185
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Quote:
Originally Posted by plowboy1963
It will air up eventually after the air builds back up, but it should not drop down just by turning the ignition on or starting the bus. Something could be under a slide out. A person could be under the bus. Anything when you turn the key on it should stay Level and not move.
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So what your actually looking for is a link between the coach ignition and the leveler control ; that is triggering the levelers to go to travel mode ( retract ), as soon as the ignition is turned on .
What brand and series is the leveling system ?
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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01-19-2025, 02:41 AM
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#5
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Junior Member
Tiffin Owners Club
Join Date: Oct 2022
Posts: 20
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Valid leveling System with HWH jacks
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01-19-2025, 07:34 AM
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#6
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Senior Member
Join Date: Mar 2019
Posts: 2,478
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Obviously, it should not do that.
Until you can figure out how to get it fixed you should level it and cut electricity to the HWH side of the system. At least it won't drop if you turn on the key if you do that.
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01-19-2025, 07:44 AM
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#7
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Senior Member
Join Date: Jul 2017
Location: on the road / Frostproof
Posts: 370
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So if you turn on the key , the jacks retrack ? Why can't you drive the coach . Jacks are up ,slides in ,go .
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Jim 2016 Forza 34 T 2014 Honda CRV
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01-19-2025, 08:03 AM
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#8
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Apr 2012
Location: Southern NM
Posts: 3,786
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I had a similar problem, if you turned on the ignition, the jacks would retract. It was the keypad panel causing it. Replaced that and all was fine. If the engine was also started, of course the bags would air up.
The air system will eventually loose air over a period of days so your situation could be dangerous as you stated the whole coach may drop.
__________________
2018 Allegro Bus 37AP
2014 Phaeton 40 QBH (sold)
2022 Jeep JLURD
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01-19-2025, 11:03 AM
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#9
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Junior Member
Tiffin Owners Club
Join Date: Oct 2022
Posts: 20
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Already installed a new keypad and Valid pump module now they’re sending me a new rear Valid Leveling module they say that could be the problem
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01-19-2025, 11:08 AM
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#10
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Junior Member
Tiffin Owners Club
Join Date: Oct 2022
Posts: 20
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Can’t drive it because there’s also another issue when it’s in park drive or neutral at travel height. I have an air leak where the front of the bus drops down and pumps back up about every two minutes only the front.
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01-19-2025, 01:23 PM
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#11
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Apr 2012
Location: Southern NM
Posts: 3,786
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Did all this start at once?
There is a dump valve that’s known to go bad once in awhile. On most it’s located on the frame near the DS wheel. Or you could have a leak at one of the front airbags.
__________________
2018 Allegro Bus 37AP
2014 Phaeton 40 QBH (sold)
2022 Jeep JLURD
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01-19-2025, 03:17 PM
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#12
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Junior Member
Tiffin Owners Club
Join Date: Oct 2022
Posts: 20
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the jacks have been retracting when ignition is turned on for awhile. the rear 10 amp leveling module fuse recently blew .front air bags just started there up and down issue.rv shop changed hydraulic pump module per tiffin suggestion also touchpad was tiffin suggestion . now new rear valid leveling module per valid tech advice.for jack retracting issue. -30 below wid chill right now will check on air leaks when it warms up to 0 maybe. i have reservations in arizona since december 1 still trying to get there any help appreciated no knowlegable rv techs anywhere close 200 miles. biggest mistake ever tiffin allegro bus 45op 2015 continueous problems no servce only 25,000 milrs
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01-23-2025, 02:57 AM
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#13
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Junior Member
Tiffin Owners Club
Join Date: Oct 2022
Posts: 20
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Update today we will change rear leveling module per valid tech cross your fingers
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01-25-2025, 03:01 PM
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#14
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Senior Member
Tiffin Owners Club
Join Date: Sep 2022
Posts: 283
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sounds quite disabling at best.
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