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HELP!!! Bendix hydrovac |
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SteveM C/IL
Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 7979 |
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Posted: 23 Nov 2022 at 11:02pm |
There's a ton of experience on this board. I have a 'fresh" rebuilt (Cardone) hydrovac to put on my 73 C60 grain truck. Problem is they didn't orient the back half of the can with the front half so the mounting brackets don't square up. It has a welded bracket on the back half of booster can which bolts to bracket on frame rail. The front end of the cylinder has a angled threaded boss which bolts to a second frame rail bracket. They are supposed to be in the same plane and are not! Can I loosen the clamp around the diaphram and slip it to position without damaging anything? Very difficult to find any info on these things. On the one hand I should send it back but if you knew the back story you'd understand why I'm reluctant to do that. Any help appreciated.
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DMiller
Orange Level Access Joined: 14 Sep 2009 Location: Hermann, Mo Points: 29459 |
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Would send back, diaphrams in these are not all that robust, could wrinkle or tear it.
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KJCHRIS
Orange Level Joined: 21 Dec 2015 Location: WC Iowa Points: 812 |
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I replaced quite a few hydrovacs on GM / IHC trucks built in 60's to mid 80's. Only once tried to do what you're thinking of, it failed shortly after. Rebuilder refused to warranty, said it'd been tampered with. Employer got to buy it wasn't happy with me.
I'd do what DMiller says, take it back & have them get 1 that fits as delivered to you.
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AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B,
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Coke-in-MN
Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41185 |
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Last 60 series Viking cabover I did the brakes on I wnt through 3 boosters and none would work right . Went to a junk yard and found one on a truck that still had brakes that felt like they worked - pulled the unit and it worked fine for the 3 years I kept the truck , and price was $20 for the used unit, lot cheaper than the rebuilt .
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
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SteveM C/IL
Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 7979 |
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Seen a youtube of a guy who didn't know anything about what he was doing take one apart. The diaphram looked big and simple pinched at seam like an airbrake pancake.....Lets just say it's working for now....
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jaybmiller
Orange Level Access Joined: 12 Sep 2009 Location: Greensville,Ont Points: 21458 |
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had to google it.... but for sure I'd send it back !!! brakes are kinda important..... Whoever rebuilt it didn't reassemble it right. crazy thing is 'monekywrench' sells them for $220, AmazonCanada $1000 !!
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HudCo
Orange Level Joined: 29 Jan 2013 Location: Plymouth Utah Points: 3269 |
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make sure your rear brakes are adjusted up or that will cause them boosters to ack like they dont work somtimes
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200Tom1
Orange Level Joined: 03 Jun 2019 Location: Iowa Points: 1124 |
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Hudco. +1 on that 1.
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SteveM C/IL
Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 7979 |
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Im betting they could use an adjustment. Sounded like plenty of movement inside there while helper pumped and I bled.
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DMiller
Orange Level Access Joined: 14 Sep 2009 Location: Hermann, Mo Points: 29459 |
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Really need to be up on adjust before bleed them, learned that forty years ago.
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