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Old 02-01-2013, 01:44 PM   #1
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1971 21' Globetrotter
Redondo Beach , California
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Putting the drums on the new axle

So I put the new axle on, and cleaned up the wheel wells nicely, and now for the final brakes etc assembly. Here's what I intend to do; Help me out if I'm about to do anything wrong...

-Bolt on the drum backing plates with brakes installed, torque the 5 nuts to 100ft-lbs
-grease inner and outer bearings, put them on the drum, install grease seal on inner side
-lube up spindle, slide the drum all the way snug
-put on castle nut, torque to 45ft-lbs, put in cotter pin
-put on outer grease cap
-slide on Centramatic balancers, put on wheels
-go camping

Am I missing anything?



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Old 02-01-2013, 02:04 PM   #2
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You need to back off the 45 ft-lbs on the nut. Usually you torque to a high value while spinning the wheel and then back off about 1/4 of a turn. If you leave the bearings tight they will overheat when they get hot and expand a little. Better a little too much clearance than too little. I would use a good Moly based grease. Do you have a bearing packer that will fill the bearings full of grease? When you get all of it together you need to adjust the brakes so that the wheel locks then back off till there is just a slight drag. Road test and make sure you don't have any wheels that lock before the others. Make sure all braking surfaces are grease free.

Perry
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Old 02-01-2013, 02:27 PM   #3
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Thanks for the advice on the how much to tighten the nut. I do have a bearing packer. The brakes are the self-adjusting kind, so I was thinking I just have to assemble it all and they would adjust while I'm reversing.
bh
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Old 02-01-2013, 02:34 PM   #4
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Perry has said it all. But, you don't need a bearing packer to do the job. If you have access to one they work great but bearings have been packed for years by hand. Clean the bearings well and put some grease in the palm of your hand and rub the bearings back & forth until you see grease squeezing through to the inside all around. Messy but easy. If you plan to do it frequently and / or have other machinery that needs bearings done invest in a packer. But don't be afraid to do it without one. When you back off the castle nut just go back until you can get the cotter pin in the groove. Grab the wheel top and bottom and wiggle it. A little play is good. No play at all is probably too tight.
When on the road I check the wheels at every stop. Just walk around and put your hand on the hub. You'll know if its too hot. No mistaking that one. Warm is OK, Hot is not.
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Old 02-01-2013, 03:48 PM   #5
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If you are referring to the 5 bolts that hold the backing plate. 100#'s of torque is WAY TOO MUCH. 40#'s is plenty.
The spindle nut should be tightened just beyond finger tight, then backed off until you can get the cotter key in the castle nut and thru the hole in the end of the spindle.
As mentioned above, TOO TIGHT IS WORSE THAN A LITTLE LOSE.
There are a number of videos on YouTube demonstrating the process.
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Old 02-01-2013, 04:46 PM   #6
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I would do an adjustment when you first install them manually. If the shoes do not contact the drum when applied there will be no self adjusting action. So when you're done with the installation spin the wheel with your hands and tighten them up until the wheel stops rotating. Back off a few notches until you can barely hear the shoes drag. Do this at each wheel of course. If you have a helper have them apply the brakes manually to make sure then take a test drive. From then on the self adjustment will take care of it from there. I quite often will do a very slow speed manual application on a dirt road or gravel to see if any wheel locks up too early or doesn't lock up at all.
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Old 02-01-2013, 05:14 PM   #7
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Yes you must pre adjust them. It will take a while for them to self adjust. I would be careful about letting them lock till the shoes break in. It is not hard to flat spot a tire while testing brakes. Keep your controller set a little on the low side till they break in.

No you don't need a bearing packer but it makes a messy job a little less messy. I use a grease gun with one of those double cone thingys and it works well. You will go through a lot of paper towles. Keep dirt and sand out of stuff. Think operating room clean here.

Perry
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Old 02-01-2013, 05:30 PM   #8
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A bearing packer is $9 at Pep Boys. Well worth it...
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