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Top mount torque?

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Brad.Cogan Avatar
Brad.Cogan Bradley Cogan
RAF Cosford, Shropshire, UK   GBR
1977 Triumph Spitfire 1500 "Wray"
2007 Fiat Grande Punto "Pepper"
I've already snapped a stud on one thinking it didn't seem tight enough and I am rather heavy handed. Luckily I've got a spare but I can't find any torque figures for this part anywhere.

How tight would you guys do it up? Obviously it's an important part and I don't want to mess it up.



Brad Cogan

1977 Triumph Spitfire 1500 'Wray'
2007 Fiat Grande Punto Active 1.2 'Pepper'

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Tonyfixit Avatar
Tonyfixit Tony M
Duncan, British Columbia, Canada   CAN
What is a top mount?

What are you working on?

Most fasteners have torque recomendations you can look up depending on size, thread, and the grade of fastener material.

But be aware you cannot accurately torque a fastener to 10 ft lbs with a torque wrench rated upto 300 ft lbs. Typically the traditional torque wrenches are most accurate in the mid range of settings or gauges.

SpiTazz72 Avatar
SpiTazz72 Bryan H
Magnolia, Texas, USA   USA
Road wheel to hub 48ft/lbs (65Nm) 3/8 UNF stud

http://www.triumphspitfire.com/Torque.html

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grubscrew Avatar
grubscrew grub screw
The suburbs of, Winfield, Maryland, USA   USA
In reply to # 1497219 by SpiTazz72 Road wheel to hub...

So that's a 'top mount' ???



Dave
1970 Spitfire Mk3
FDU 78359L
34/11 (Jasmine yellow/Black interior)

1962 Triumph TR3B
TCF 575L
Signal Red/Red interior

SpiTazz72 Avatar
SpiTazz72 Bryan H
Magnolia, Texas, USA   USA
In reply to # 1497222 by grubscrew
In reply to # 1497219 by SpiTazz72 Road wheel to hub...

So that's a 'top mount' ???

Just my best guess since the landing gear on the Spitfire plane can be called a main mount and he's asking what the top (most) torque setting is for the mount, I just reached out and put the two together.
Or it could just be my pretzel logic. smiling smiley

Yellowhawk Valley Avatar
walla walla, washington, USA   USA
1969 Triumph Spitfire "Walla Walla"
1969 Triumph Spitfire "Portland"
1972 Triumph Spitfire MkIV "Spokane"
1975 Triumph Spitfire 1500 "Dayton"    & more
Bradley, are you talking about bolting on the hood frame? The tapered head screws that go into the captured nuts on the inner wall behind the door? If so, those are done hand tight with a screwdriver or only as tight as you can twist with one hand.
Dan

Brad.Cogan Avatar
Brad.Cogan Bradley Cogan
RAF Cosford, Shropshire, UK   GBR
1977 Triumph Spitfire 1500 "Wray"
2007 Fiat Grande Punto "Pepper"
Sorry I'm speaking English lingo. The plate at top of the front suspension that connects the shock and spring and that has 3 studs that mount to the frame.

I've always called them top mounts for short. Must be a British thing.

Here's a picture of it.



Brad Cogan

1977 Triumph Spitfire 1500 'Wray'
2007 Fiat Grande Punto Active 1.2 'Pepper'

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Attachments:
Screenshot_20171111-102602.jpg    31.1 KB
Screenshot_20171111-102602.jpg

Brad.Cogan Avatar
Brad.Cogan Bradley Cogan
RAF Cosford, Shropshire, UK   GBR
1977 Triumph Spitfire 1500 "Wray"
2007 Fiat Grande Punto "Pepper"
I'm looking for the torque figure or an idea of how tight the 3 nuts should be. Thanks.



Brad Cogan

1977 Triumph Spitfire 1500 'Wray'
2007 Fiat Grande Punto Active 1.2 'Pepper'

spitfire50 Avatar
spitfire50 Paul Mugford
Rochester, N.H., USA   USA
Brad,
I don't find a torque for those given in a manual, but similar sized bolts are torqued to 14-16 lb-ft maximum.
All the best,
Paul

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Brad.Cogan Avatar
Brad.Cogan Bradley Cogan
RAF Cosford, Shropshire, UK   GBR
1977 Triumph Spitfire 1500 "Wray"
2007 Fiat Grande Punto "Pepper"
In reply to # 1497300 by spitfire50 Brad,
I don't find a torque for those given in a manual, but similar sized bolts are torqued to 14-16 lb-ft maximum.
All the best,
Paul

Excellent thank you.



Brad Cogan

1977 Triumph Spitfire 1500 'Wray'
2007 Fiat Grande Punto Active 1.2 'Pepper'

SpiTazz72 Avatar
SpiTazz72 Bryan H
Magnolia, Texas, USA   USA
Well I tried smiling smiley

Funny thing is I was installing mine at the same time you posted this.
Here's the link I saved... http://www.triumphexp.com/phorum/read.php?8,1343095

clshore Carter Shore
Beverly Hills, Florida, USA   USA
Most fasteners do not require any specific torque to perform effectively.
The exception are those which are loaded in tension, head studs/bolts, main bearing bolts/studs,
connecting rod bolts/studs, wheel fasteners, U Joint fasteners.
On those the torque (and thus the clamping force) are critical.
Otherwise, enough to prevent loosening in service, basically 'hand tight'.
I've always found that a dab of Loctite Blue nicely prevents loosening, I use it on all common fasteners.

The 3 studs in question are 1/4" (either 1/4-20 or 1/4-28), and the specified nuts are nyloc.
The purpose is to attach the 'spring top plate' to the turret structure.
In normal use, the pressure of the compressed road spring very firmly holds the top plate in place.
Only at full droop do the 3 studs experience any tensile loads, from the rubber bushings attaching
the center rod from the shock as it reaches it's travel limit.
Even then, should the nuts somehow have become loose, there is no harm done.



Edited 1 time(s). Last edit at 2017-11-11 11:20 AM by clshore.

Tonyfixit Avatar
Tonyfixit Tony M
Duncan, British Columbia, Canada   CAN
No, those bolts are not critical. I replaced mine with stainless from the hardware store.

Brad.Cogan Avatar
Brad.Cogan Bradley Cogan
RAF Cosford, Shropshire, UK   GBR
1977 Triumph Spitfire 1500 "Wray"
2007 Fiat Grande Punto "Pepper"
In reply to # 1497319 by SpiTazz72 Well I tried smiling smiley

Funny thing is I was installing mine at the same time you posted this.
Here's the link I saved... http://www.triumphexp.com/phorum/read.php?8,1343095

I wasn't being sarcastic, it actually helped give me an idea



Brad Cogan

1977 Triumph Spitfire 1500 'Wray'
2007 Fiat Grande Punto Active 1.2 'Pepper'

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