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Brake Job and some Redesign
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LCAC_Man
Posted 2019-11-11 8:20 PM (#7062 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Elite Veteran

500100100100
Location: Oceanside, CA
I don't think there'd be any risk as long as you didn't use a pressure greaser and grossly over-service it; it will (for me) just be a means to keep it tended between larger services that require disassembly.
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byegorge
Posted 2019-11-18 2:01 AM (#7069 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Veteran

1002525
Location: Olympia, Washington
People want to make it easy and not do the work, pump it full the grease will come out some where it always does.
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hemi354az
Posted 2019-11-18 11:42 AM (#7070 - in reply to #6883)
Subject: RE: Brake Job and some Redesign


Extreme Veteran

100100100100252525
Location: Scottsdale, Aridzona
There are many types of seals for lubricated rotating machinery. There are types to keep stuff out, keep stuff in, types for low pressure outside . . . or inside, high pressure inside . . . or outside, different lubricants, spring loaded, single lip, double lip, carbon (or other material) faced seals like the ones used in new water pumps . . . and old gas turbines. All types, each for a certain set of requirements/conditions.

Seal manufacturers have handbooks that help a user pick a seal type for those different requirements, conditions, size, lubricant etc.

Simple one Page - https://www.bearingservice.com/products/seals/grease-seals
SKF (Largest bearing and Seal Manufacturer in the WORLD !) - https://www.allsealsinc.com/skf/SKF_catalog.pdf
Parker Rotary Seal Design - https://www.parker.com/literature/Engineered%20Polymer%20Systems/535... - see Pressure Pg 2-10
Timken Seal Specification Guide - https://basco.com.pe/pdf/timken/timken_seal_specification_guide_us.p... - See page 8 Operating Conditions,
or - https://www.timken.com/pdf/7707_National%20Indust%20Seals%20Catalog.... - See Section 1-AQ Technical
NASA/Sikorsky - https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19740023835.pd... - just for fun reading when you go to bed , zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.

LOTS of Grease Seal Stuff on the NETS. Search until you find something you like and agree with, but remember a FMC cannot fly . . . Wings are TOO SHORT.

Wheel Bearings are designed for "NO" pressure. They are there to keep the bearing grease from running out. Filling the bearing "cavity" until an inner or outer seal leaks distorts the seal from the inside out with pressure it was never designed to seal. There is no "feature" to relieve that internal pressure caused by the "grease gun" overcoming the seal design pressure so you can see it run out and quit pumping. The seal is distorted. There is a reason car/truck wheel bearings do not come with a grease fitting. There are MANY OTHER seal designs that ARE designed for INTERNAL PRESSURE. Your choice . . . as all things are.

Seal ON !
Lou #120
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andy1canada
Posted 2019-11-18 7:28 PM (#7071 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Extreme Veteran

50025
Location: Victoria, BC. Canada
Could hardly count all them star's you got now Lou... bout' time I figure.

Stars-on!

Terry
#846
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LCAC_Man
Posted 2019-12-20 7:43 AM (#7116 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Elite Veteran

500100100100
Location: Oceanside, CA
Does anyone know if the wheel cylinder to wheel cylinder jumper line is available as a pre-fabricated tube assy or do you just have to make your own? I've got one that had rubbed on the drum dust shield, I thought it was fine but it's weeping fluid.
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BigRabbitMan
Posted 2019-12-20 10:01 AM (#7117 - in reply to #6883)
Subject: Re: Brake Job and some Redesign



Elite Veteran

100010025
Location: Cottage Grove, OR
Not commercially made. I may have one on a spare backing plate that I have. I will see if I can get it off without damage.
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LCAC_Man
Posted 2019-12-20 10:24 AM (#7118 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Elite Veteran

500100100100
Location: Oceanside, CA
Thanks Stephen!
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dkarnath
Posted 2019-12-20 10:29 AM (#7119 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Extreme Veteran

500252525
Location: Medford, OR
Brake problems Len? You going to sell it to me now? I’m pretty sure you have to make one up, unless Stephan saves the day.
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LCAC_Man
Posted 2019-12-20 10:39 AM (#7120 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Elite Veteran

500100100100
Location: Oceanside, CA
Took it out for just a "get it on the road drive" last saturday, zero problems, nice 40mile stroll down I-5, pulled back in the drive and had to double tap the brakes to come to a stop, took a walk around to find it dripping out the passenger rear drum...I was thinking one of my new wheel cylinders must have been defective but it was the line... I guess it's time to pass it on to Dan..
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hemi354az
Posted 2019-12-20 10:58 AM (#7121 - in reply to #7120)
Subject: Re: Brake Job and some Redesign


Extreme Veteran

100100100100252525
Location: Scottsdale, Aridzona
FYI - Some of the Dodge Chassis Motorhomes, Travcos and others, had the transfer tube on the OUTSIDE . . . where rocks, sticks, other debris could HIT IT . . . but it was still tougher than the Brake Fluid hose right next to it.
Henry Blair might still have the ones he made for the First, of MANY, FMCs that he has bought. Drip ON ! Lou #120

Edited by hemi354az 2019-12-20 10:58 AM
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BigRabbitMan
Posted 2019-12-20 12:52 PM (#7122 - in reply to #7118)
Subject: Re: Brake Job and some Redesign



Elite Veteran

100010025
Location: Cottage Grove, OR
LCAC_Man - 2019-12-20 8:24 AM Thanks Stephen!

Its in a box and will go out today. By the way, the "master" one of these used by RVS is in Bill Sitton's stash of stuff I gave him.
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LCAC_Man
Posted 2019-12-20 1:16 PM (#7123 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Elite Veteran

500100100100
Location: Oceanside, CA
let me know what you want for it and what the shipping cost was and I'll shoot you some $$; Thanks!
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B. Sitton
Posted 2019-12-20 1:46 PM (#7124 - in reply to #7123)
Subject: Re: Brake Job and some Redesign


Extreme Veteran

100100100252525
Location: Ignacio Colorado
You should have one made using your leaking one as a pattern. Probably faster and not expensive. Need to save the “pattern”. Rub is because it was tightened to far in or out from backing plate.
Bill
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LCAC_Man
Posted 2019-12-20 9:43 PM (#7125 - in reply to #7124)
Subject: Re: Brake Job and some Redesign


Elite Veteran

500100100100
Location: Oceanside, CA
Had I not been able to find one I would have used this one as a template to fan a new one...I'm in no particular hurry so waiting a few days is no big deal...It was too far out and just right on the cutting edge of the drum heat/dust shield. I'll keep this old one in case I ever do have to build one from scratch.
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5Dollar
Posted 2019-12-21 1:33 AM (#7126 - in reply to #7125)
Subject: Re: Brake Job and some Redesign


Veteran

100
Location: Bethune, SC
I see where Lou mentioned I had some Travcos and a salvage FMC.  Salvage FMC is long gone and all but one Travco is gone.  I looked through my used parts the other day and did not see any. I have got to make two myself.

Henry
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byegorge
Posted 2019-12-21 6:38 AM (#7128 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Veteran

1002525
Location: Olympia, Washington
They are not difficult to make up just make sure of your hub clearance as well as the shield.
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LCAC_Man
Posted 2019-12-27 5:15 PM (#7137 - in reply to #6883)
Subject: Re: Brake Job and some Redesign


Elite Veteran

500100100100
Location: Oceanside, CA
All back together and check flight complete! Thanks for the assist Stephen!
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