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07-05-2017, 07:06 PM | #1 |
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Torque Spec bolts that hold drum / backing plate to spindle
Torque Spec bolts that hold the backing plate to spindle, Can't find it printed anywhere.
Thanks!
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Throttle Benders Est. 1949
Last edited by Ball and Chain; 07-05-2017 at 07:42 PM. |
07-05-2017, 07:24 PM | #2 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
Are you sure you worded that correctly? The drum and backing plate are two different things. The backing plate bolts to the spindle. The drum turns on an inter and outer bearing and does not use a torque value. It is tightened and set based on the free turning of the bearings. Or am I misunderstanding what you are asking?
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07-05-2017, 07:26 PM | #3 | |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
im looking for the torque on the four 1/2 inch square head bolts that hold the spindle to the backing plate. sorry for the confusion
Quote:
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07-05-2017, 07:49 PM | #4 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
I've never seen any specific values, however they may exist. You can always check a torque value chart for the values based on bolt ID, thread size and bolt type. Torque values should be chart values except in cases where clamping force is an issue, such as cylinder heads, main bearings, etc.
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07-05-2017, 08:48 PM | #5 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
I have never been able to find the torque value for those backing plate bolts.
I just use a 1/2 in. drive ratchet and socket and make them as tight as possible by hand. I also use the lock washers. Make very sure the head is seated properly against the spindle. Also, use some BLUE Loctite. Last edited by 19Fordy; 07-06-2017 at 08:04 AM. |
07-05-2017, 09:27 PM | #6 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
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I've never set backing plate bolts to a torque spec either. On my 35's I just tighten them down good, and install the cotter pin. Never had one come loose.
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07-05-2017, 09:32 PM | #7 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
I think those bolts are 1/2-20 so around 40 or 45 is probably good. I am about to the same place and that was what I was going to use. I plan on using just the marsden lock nuts.
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07-06-2017, 01:44 AM | #8 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
They're grossly over engineered. Just good and tight is good enough. Nice and tight and then to the next castellation if you're using them. No need to go mad on 'em.
The only ones that are more critical are the rear lower ones where they attach the radius rods on some models. Same applies, nice and tight, I'd guess about 50 lbs ft. Mart. |
07-06-2017, 05:30 AM | #9 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
Torque specs for backer plate to spindle as called out in '49-'51 Merc. manual for 1/2"-20 nut to bolt.
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07-06-2017, 09:09 AM | #10 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
Good input!
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07-06-2017, 12:54 PM | #11 | |||||
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Re: Torque Spec bolts that hold drum / backing plate to spindle
Quote:
Quote:
Quote:
Quote:
Quote:
@JM 35 Sedan Sorry its the 35 in my avatar, 39-41 axle drums and backing plates 42-48 spindles
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05-03-2018, 05:13 PM | #12 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
Not to hijack this , but I need the bolts for my spindle to backing plate. Mine are very rusty and I would like new ones. round back spindles and matching backing plates .Where?
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05-04-2018, 08:51 AM | #13 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
48: I sent you a PM re: OEM bolts.
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04-04-2021, 12:22 PM | #14 |
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Re: Torque Spec bolts that hold drum / backing plate to spindle
May I ask what was the source of the torque specs that you provided? I would love to obtain a copy.
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