Front drum backing plate gasket?

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gaertner_jan
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Front drum backing plate gasket?

Post by gaertner_jan »

Guys, a quick question: we're restoring a 1968 F100 with front drum brakes. Is there supposed to be a gasket between the spindle and the backing plate? The rear axle utilizes backing plate gaskets, wouldnt the front also? Just cant seem to find anything anywhere...

Thanks! J
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1972hiboy
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Re: Front drum backing plate gasket?

Post by 1972hiboy »

http://www.fordification.com/tech/image ... ont_01.jpg


Looking at this, it looks like it doesn't have a gasket behind the backing plate but might utilize some sort of seal on the front side of the backing plate.
Rich
1973 f350 super c/s 460/c6 22k orig miles
1972 f350 srw crewcab special 390
1972 f250 4x4 sport custom 390fe Red
1972 f250 4x4 custom 360 FE " Ranger Ric"
1972 f250 4x4 custom 84k og miles 390
1971 f250 4x4 sport custom 56k og miles. 360
1970 f250 4x4 428 fe hp60 205 d60
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gaertner_jan
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Re: Front drum backing plate gasket?

Post by gaertner_jan »

Hey Rich, yea I've seen that drawing. It irritates me because we have no further screw holes provided for a seal as pictured. There was definitely nothing like that there when we took it apart either but you can never know what a PO may or may not have done at some point in time.
At the moment I'm leaning towards not using/making a gasket. Any other opinions?

J
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1972hiboy
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Re: Front drum backing plate gasket?

Post by 1972hiboy »

Good Morning J, Honestly I think with the front backing plates a gasket is not necessary, I am thinking the rear backing plate gasket has something to do with gear lube oil control. Front wont have that issue.
Rich
1973 f350 super c/s 460/c6 22k orig miles
1972 f350 srw crewcab special 390
1972 f250 4x4 sport custom 390fe Red
1972 f250 4x4 custom 360 FE " Ranger Ric"
1972 f250 4x4 custom 84k og miles 390
1971 f250 4x4 sport custom 56k og miles. 360
1970 f250 4x4 428 fe hp60 205 d60
Dont eat yellow snow.....
ultraranger
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Re: Front drum backing plate gasket?

Post by ultraranger »

As far as the rear end goes, oil control is handled by the axle seals. The purpose of the gaskets on either side of the drum backing plate is to keep fine particles of (abrasive) brake dust from getting into the axle bearings.
Steve

1969 SWB F100 Ranger. 240-6, C-4, 9" N-case 31-spline Traction-Lok w/3.50 gears.

1968 Mustang. My high school car. Owned since 1982.

2003 Azure Blue Mustang Mach1.
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1972hiboy
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Re: Front drum backing plate gasket?

Post by 1972hiboy »

ultraranger wrote:As far as the rear end goes, oil control is handled by the axle seals. The purpose of the gaskets on either side of the drum backing plate is to keep fine particles of (abrasive) brake dust from getting into the axle bearings.
Ah there we go, that makes sense.
Rich
1973 f350 super c/s 460/c6 22k orig miles
1972 f350 srw crewcab special 390
1972 f250 4x4 sport custom 390fe Red
1972 f250 4x4 custom 360 FE " Ranger Ric"
1972 f250 4x4 custom 84k og miles 390
1971 f250 4x4 sport custom 56k og miles. 360
1970 f250 4x4 428 fe hp60 205 d60
Dont eat yellow snow.....
Busboy
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Re: Front drum backing plate gasket?

Post by Busboy »

Seems like I've seen some GM products with a white foam type gasket there. I would just lay a thin bead of your favorite gasket sealer and then assemble it. My concern is more to keep water out of the hub and bearings than anything else.
1967 F-100 4x4 custom cab.
Another 67 F-100 4x4 custom cab.
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1972 F-350 Sport Custom cab & chassis.
1972 F-250 Explorer Special, Camper Special.
1971 F-100 custom. 302, C-4, p.s. p.b. factory 65 amp alternator with transistorized voltage regulator.
gaertner_jan
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Re: Front drum backing plate gasket?

Post by gaertner_jan »

Hey guys,

thanks for the inputs! The grease seal should do the job of keeping any junk out of the bearings so I think I'll only apply a thin coat of gasket maker and bolt it all up.

thanks for the support! =) J
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Re: Front drum backing plate gasket?

Post by ultraranger »

If you're going to use RTV, use the sensor safe kind (the version that doesn't stink). The ingredient in non-sensor safe RTV that makes it stink is Acetic Acid. The vapors from Acetic Acid are corrosive to bearings/steel.
Steve

1969 SWB F100 Ranger. 240-6, C-4, 9" N-case 31-spline Traction-Lok w/3.50 gears.

1968 Mustang. My high school car. Owned since 1982.

2003 Azure Blue Mustang Mach1.
earlrjohnson
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Re: Front drum backing plate gasket?

Post by earlrjohnson »

My 68 has an O-ring behind the backing plate. I assume this is what they call the gasket.
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