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Old 07-20-2020, 01:37 PM   #1
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HELP! 2000 Dolphin Tag Axle Brake Parts

Hello, everyone.
I need help finding tag axle brake booster springs for a 2000 National RV Dolphin 3553 Class A with V10 Triton on an F53 chassis.

We were heading to Idaho July 28th to visit my dad in hospice and had the motor home fully inspected before the trip (from Marinette, WI).

Truck Country found the tag axle brakes inoperative, leaking fluid into booster and booster spring broken into three pieces. Everything can be repaired/rebuilt EXCEPT the spring.

The mechanic and I have been hunting everywhere with negative results.

Unfortunately, the only info either of us has is the Motor Home info as there are no identifying marks or info on the booster.

HELP!!!

I appreciate any help or advice I can get, and want to THANK YOU in advance.
Thanks
Dave
Marinette, WI
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Old 07-21-2020, 12:00 AM   #2
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Look for an ID tag on the tag axle itself. Many gasser tag axles were made by Dexter and if yours is a Dexter axle they might be able to help.
https://www.dexteraxle.com/
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Old 07-22-2020, 12:30 AM   #3
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Here are some old posts that should help.
https://www.irv2.com/forums/f65/hydr...on-101083.html
https://www.irv2.com/forums/f103/tag...id-102172.html
https://www.irv2.com/forums/f23/mor-...ts-322622.html
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1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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Old 07-22-2020, 10:17 AM   #4
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Thank you.

Nick B, CHBoone.
I want to thank you both for your time, assistance and info. I greatly appreciate the the help.
What actually went was the tag axle brake actuating system: booster spring was broken in three pieces, fluid was bleeding where it shouldn't be, etc.

Everything could be rebuilt/repaired EXCEPT the booster spring. The mechanic and I spent over a day researching and calling with the same negative results: Dexter made axle and brakes, and a company called 'Masterbrake' made the actuating system, and unfortunately, Masterbrake (?) went out of business years ago when the last (?) major downturn in rv and trailer sales occurred.

Since the tag is actually a trailer axle add on by National, also out of business, I ended up going with an electric braking system so I don't have to worry about hydraulics, and parts at readily available. Trailer and others had just re ticket, once I had brake drum dimensions, backing plate bolt quantity, and axle capacity.
Again, thanks, and hope you have a great season.

PS: I may have had the model wrong, is either a 5335 or 3553. At my age have a good case of CRS. 😃
PSS: NICK, I had an earlier model Santa (used). I loved it...except I kept chasing corroded wire...apparently it had been in hurricane down south and was sold at auction to the dealer we bought it from in Wisconsin's without any disclosure. 😢
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Old 07-27-2020, 05:00 AM   #5
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so some good friends of mine run Power Brake Sales in Sacramento CA.... same family owned business since 1948.
powerbrakes.com they re-manufacturer both hydraulic and air brake components... do LOTS and LOTS of restorations for cars, trucks and air brake work...

Call Sandra or Kathy, very knowledgeable and excellent over the phone... tell them Jim from Spokane said HI....

Honestly.... very good people...
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Old 07-27-2020, 10:10 AM   #6
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jelag,
Thank you for that link, looked through their website alway good to have a source for brake knowledge.
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1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000,1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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