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Old 05-22-2006, 07:57 PM   #1
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Need easy way to take brake drum off..>>

I want to inspect my brakes on the trailer my father left when he pasted. I need to know how to get wheel drum off so I can inspect brake pads .

Also need trailer wireing diagram for same trailer trailer specs below..

1976 Airstream Sovereighn land Yacht (with electric brakes)
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Old 05-22-2006, 08:15 PM   #2
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Welcome to the forums.
Your drums will come off like the front brake drums of 1960's vintage cars, with a couple of small differences.
First, raise the coach by pulling it up anot a pair of wooden blocks or ramps under one wheel on each side, so that two tires are off the ground.
Remove the tires that are off the ground.
Remove the grease cap from the hub, and remove the cotter pin, castle nut, and washer.
Slide out the outer bearing, and thread the castle nut back on the spindle a few turns.
Slide the drum off the spindle, and as you do so, you will be able to use the castle nut as a tool to remove the inner bearing and seal by sliding it up to the nut, and tapping the bearing and seal out, hopefully without damaging the seal.
Now that the drum is off, you will see the other difference from a car--no hydraulic system.
I don't know if you are familiar with electric brakes, but I will give you a fast rundown on what to look for. You will find a magnet, probably round, on a bracket out front of the brake hardware. Look at the magnet. If the magnet has worn down to the point where the little brass screws are level with the magnet material, they will need to be replaced. Hopefully not, for your first go-round with the brake system.
Make sure the bracket the magnet is on freely works the brake linkage, you will see the shoes move outward as you move the magnet toward the rear of the trailer. If it does, great, if not, you will need to free up the linkage so it works. Check the brake linings to make sure there is still lining left, 3/32" is usually considered minimum for shoe thickness.
If all this checks out, have a helper apply the trailer brake controller in your tow vehicle (it must be hooked up to the trailer), and hold a compass near the brake magnet. If the compass needle swings toward the mahnet, it is good, and you can repack your wheel bearings and reassemble the drum and wheel, using a new grease seal and new cotter pin. You can now move on to the next drum.
Also, trailer brakes are different from right to left, so if you need parts, be sure to specify which side you need when ordering.
Good luck with it.
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Old 05-22-2006, 08:35 PM   #3
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This is..


Also, you can visit this site for more info..
http://www.marksrv.com/wiring.htm
glad to see another A/S owner near by~!
ciao
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Old 05-22-2006, 08:45 PM   #4
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Quote:
Originally Posted by 53FlyingCloud

Also, you can visit this site for more info..
http://www.marksrv.com/wiring.htm
glad to see another A/S owner near by~!
ciao
53FC
If he has the original plug and wiring, this will be of more help: http://www.airstream.com/airstream/p...lug1966-81.pdf

Bill
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Old 05-22-2006, 09:05 PM   #5
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Still a mystery ...

53FC:

Perhaps I think too hard or too long about all this, but I've never been able to figure out whether the diagrams you posted represent (A) the two faces of the trailer and tow vehicle plugs, i.e. their mating surfaces, or (B) the opposite ends of each plug where one actually connects the wires to each plug (which seems to make more sense to me than having to "flip" each diagram mentally to get the correct result at the connecting end). Why are these diagrams never labeled to indicate the actual viewpoint, front or rear of each plug??
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Old 05-22-2006, 09:47 PM   #6
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Quote:
Originally Posted by 47WeeWind
53FC:

Perhaps I think too hard or too long about all this, but I've never been able to figure out whether the diagrams you posted represent (A) the two faces of the trailer and tow vehicle plugs, i.e. their mating surfaces, or (B) the opposite ends of each plug where one actually connects the wires to each plug (which seems to make more sense to me than having to "flip" each diagram mentally to get the correct result at the connecting end). Why are these diagrams never labeled to indicate the actual viewpoint, front or rear of each plug??
Fred,

They are always looking at the pin side of the plug or receptical and not the cord side.

Bill
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Old 05-22-2006, 10:00 PM   #7
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pin number seven in the above diagram should be labeled back up lights.

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Old 05-22-2006, 10:33 PM   #8
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Wiring indirections

Quote:
Originally Posted by wkerfoot
Fred, They are always looking at the pin side of the plug or receptical and not the cord side. Bill
Thanks, Bill. So I'll have to remember to look at the diagrams in a mirror when connecting the wires to the opposite [cord] end of the plug, or maybe scan the diagrams into Photoshop, reverse them side to side, and print them out to look at when wiring the cord ends of the plugs, to satisfy my simple yet direct mind.
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Old 05-23-2006, 07:19 AM   #9
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Quote:
Originally Posted by wkerfoot
If he has the original plug and wiring, this will be of more help: http://www.airstream.com/airstream/p...lug1966-81.pdf

Bill
Is the 12v the onboard batterys charge circuit when hooked up to vehicle.
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Old 05-23-2006, 07:25 AM   #10
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As far as the plug goes ill be making a cord from the trailer to the vehicle my vehicles have flat 7 prong plugs that is only reason I need diagram I have prodogy brake controller hooked up and ready to go.
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Old 05-23-2006, 09:54 AM   #11
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Quote:
Originally Posted by Mrcrowley
Is the 12v the onboard batterys charge circuit when hooked up to vehicle.
Yes,

Bill
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Old 05-23-2006, 01:29 PM   #12
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Bearing adjustment

Just how tight do you adjust the wheel bearings after packing?
I used the old hand snug then back off 1/4-1/2 turn method.
What is proper method?

My left tire is wearing significantly on the inside after 3600 miles. The right tire is fine. Could this be bearings loose?

If the axle was tweaked I would expect both tires to show wear.

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Old 05-23-2006, 01:32 PM   #13
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brakes on in reverse

Can someone help me figure why my brakes lock tight when I put TV in reverse?? Brakes work as advertised in forward gears and neutral.

I have to disconnect trailer to back it up.
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Old 05-23-2006, 01:54 PM   #14
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walter1, sounds like the electric brake line is tied into the backup light circuit somehow. Do your electric brakes work at all?
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Old 05-23-2006, 05:41 PM   #15
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Hi walter1--Correct wheel bearing adjustment: Tighten nut hand tight, or lightly with a wrench. Spin wheel to smooth out grease. Grab top and bottom of wheel and shake. Should be no looseness. Loosen nut one position and line up holes in spindle & nut. Grab top and bottom of wheel and shake. Should be some looseness. If not loosen one more position and shake as before. If looseness detected install cotter pin, and dust cap, and you are ready to go.

Inside tire wear might be wheel to loose, or alignment problem like a bent spindle.

Trailer brakes lock in reverse may be a brake controller incorrectly connected. Some controllers disable brakes when in reverse to improve low speed backing up. That line may be connected to a hot line in error.--Frank S
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Old 05-23-2006, 05:59 PM   #16
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Quote:
Originally Posted by walter1
Can someone help me figure why my brakes lock tight when I put TV in reverse?? Brakes work as advertised in forward gears and neutral.

I have to disconnect trailer to back it up.
Sounds like the backup light circuit is also hooked up to yout brakes.

Could be nothing more than one strand of wire touching the brake circuit.

Andy
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Old 05-23-2006, 07:12 PM   #17
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Quote:
Originally Posted by walter1
Just how tight do you adjust the wheel bearings after packing?
I used the old hand snug then back off 1/4-1/2 turn method.
What is proper method?

My left tire is wearing significantly on the inside after 3600 miles. The right tire is fine. Could this be bearings loose?

If the axle was tweaked I would expect both tires to show wear.

Walter1
I think without a torque wrench and the right torque settings you would need you would not know. Another good way to tell is if you have tightened them enough. You would have to have the wheel off ground tighten the lugs and see if the wheel wobles when you try to pull on it side to side.
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Old 05-23-2006, 07:18 PM   #18
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Quote:
Originally Posted by walter1
Can someone help me figure why my brakes lock tight when I put TV in reverse?? Brakes work as advertised in forward gears and neutral.

I have to disconnect trailer to back it up.
Check that the backup lights and the brake wire are not crossed. In my case this was not the problem, the PO had drilled the frame rail that the cable rann in and drilled the cable shorting the wires together, a real mess.
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Old 05-23-2006, 08:44 PM   #19
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That's what is odd. The brakes work as they should...as long as I am going forward or in neutral. Somehow I am getting voltage (from backup lights0 when I put the TV in reverse.
Hmm...I'll get out the volt meter and check whats where
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