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#108550 - 01/14/07 11:31 pm PARTS BOOK VS. WHATS ON BIKE  
Joined: Aug 2006
Posts: 80
cwicker Offline
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cwicker  Offline
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Joined: Aug 2006
Posts: 80
Hamilton, Va
1957 T110 English market import.
Since I have only had this be for 3 yrs. I'm trying to familiarize myself with whats correct/incorrect while doing "routine" service and maint. One way to do this is as things go back together, ID each part, nut and bolt. That way you see whats there and whats not.

1. I am reinstalling the rocker boxes but have found there were lock washers under the rocker/head bolts. There are none shown in my parts book, therefore I do not reinstall those.

2. Found that all head bolts have 1 washer under each bolt head but none shown in parts book. Is there a possible reason someone has done this or is it done by mistake?

3. I also need to repair threads in the head for 1 rocker cover to head bolt. I have seen a previous post of somebody thanking somebody for the advice of 1/4X20 helicoil repair however I think the thread size in the head is 1/4X26 Are there thread repair kits for the 1/4X26 or by default (because there not available) do you have to use 1/4X20. If so, you also have to use 1/4X20 bolts that are the same length as the originals, Is this correct? Would you also use a helicoil close to to same length as the bore in the head?
Any advice for installing helicoil before I get started?

So far the term routine does not apply to alot other than oil changes. Beware of anything discribed as routine.

Thanks,
Cliff

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#108551 - 01/14/07 11:51 pm Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Oct 2003
Posts: 3,524
dave jones Offline
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dave jones  Offline
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Joined: Oct 2003
Posts: 3,524
Emsworth, sunny south of Engla...
1/4 x 26 bsf helicoils are available which I'm sure is the size. Some people think they are 1/4 x 26 CEI but I don't think so. They are almost identical, however.

As to washers under bolts, I note that for my 1967 there are supposed to be none under the barrel nuts but I have plain washers everywhere on the engine. It doesn"t seem right not to use them somehow.
Dave

#108552 - 01/15/07 1:19 am Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Aug 2001
Posts: 6,670
Jon W. Whitley Online content
Jon W. Whitley  Online Content



Joined: Aug 2001
Posts: 6,670
Vermont
Okay,

So your parts books doesn't show washers in the exploded view. One thing you will learn while viewing these parts books that sometimes there are other parts, such as washers, that don't appear in the exploded view but are listed in the parts book. So, look on page 34 of your 1957 parts book. You will see REF. No. 26 part number E3302-Washer, rocker box to cylinder head nut ( T110 and TR6) with alloy head quantity 6.

A lot of times if you don't see it in the exloded view, go to the page that diagram numbers point you to...in this case page 34 and look in the area of the associated parts for the rocker box fasteners and you will usually find what you need.

There are also parts listed by C.P. carton pack, which are located in the front of the parts book. Here for example, you will find the part numbers for the tach drive timing cover and components as well as pistons and rings, compression ratios , etc.

Bottom line: Don't assume that the exploded view diagram is 100% correct...or shows every sinchle part that you will need. Based upon common sense, one can conclude that a washer should be present for such an application and here we will be able to find it.

beerchug


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

#108553 - 01/15/07 3:15 am Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Aug 2006
Posts: 80
cwicker Offline
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cwicker  Offline
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Joined: Aug 2006
Posts: 80
Hamilton, Va
Many thanks Jon and Dave,
I do agree with theconclusion that the washers should be there.
Thats is partially what prompted the post. I think (sometimes) but your explanation of parts that aren't always shown is very helpful. Any suggestions as to length needed for helicoils ie. 1/2of the bolt thread, 2/3, 3/4.

Cliff

#108554 - 01/15/07 3:33 am Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Feb 2004
Posts: 1,956
norbsa48503 Offline
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norbsa48503  Offline
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Flint,Mich
Any thread in an alm. casting should be 2X the dia. of the bolt. So 1/2 in this case.


norbsa
1960 TR6
1963 Super Rocket
1965 650 Star
1966 441
1968 Thunderbolt
1969 Twinkle 250
1972 Fastback
1974 Roadster
1970 S.S
Way too many BSA's not named
http://decentcycles.com
#108555 - 01/15/07 1:33 pm Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Oct 2006
Posts: 208
relicduke Offline
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relicduke  Offline
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Posts: 208
Nova Scotia
I think you should realy have nice thick plain washers for your head bolts{mine are off a 350 Buick}'cause without 'em it will distort the holes .


poverty is the mother of invention
#108556 - 01/15/07 2:00 pm Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Sep 2005
Posts: 5,963
Ger B Offline
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Ger B  Offline
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Joined: Sep 2005
Posts: 5,963
NL
Whatever your part book says:
Use a washer underneath any bolt head or nut when it touches aluminium.
Damaged aluminium underneath the hexagon of a head bolt (no steel washer used) gave me problems as the hex was torqued correctly (as it chewed into the aluminium) but the bolt was not.


Ger B

#108557 - 01/15/07 2:56 pm Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Oct 2001
Posts: 83
Rico Delrosado Offline
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Rico Delrosado  Offline
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Joined: Oct 2001
Posts: 83
Texas, USA
Quote:
Originally posted by cwicker:
... I think the thread size in the head is 1/4X26 Are there thread repair kits for the 1/4X26 or by default
The stainless stud I used to replace a missing rocker box stud on the T140 bobber was 1/4 20 on the end that went into the rocker box, and 1/4 28 (1/4 fine) on the end that sticks down through the head. So the helicoil would be course, but the nut on the other end of the stud would be fine.

This is where I got the studs:
http://totallystainless.com/

HTH, neighbor

#108558 - 01/15/07 10:23 pm Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Mar 2005
Posts: 9,970
John Healy Offline
John Healy  Offline



Joined: Mar 2005
Posts: 9,970
Boston, Massachusetts
And don't forget all of the Errata sheets that were supplied to correct the US parts books to indicate what they actually built. These are quite important on 1963 to 1970 models.


#108559 - 01/16/07 2:26 am Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Oct 2003
Posts: 11,110
RF Whatley Online content
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RF Whatley  Online Content
BritBike Forum member

Joined: Oct 2003
Posts: 11,110
North Georgia, USA
Jezz. At first I thought Triumph was supplying EROTIC sheets with all their US parts books. I thought I was missing out all these years!

laughing


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
#108560 - 01/16/07 8:26 am Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Sep 2005
Posts: 5,963
Ger B Offline
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Ger B  Offline
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Joined: Sep 2005
Posts: 5,963
NL
Are those the books I saw you hold upside down when you read them, Richard? confused


Ger B

#108561 - 01/16/07 6:11 pm Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Oct 2003
Posts: 11,110
RF Whatley Online content
BritBike Forum member
RF Whatley  Online Content
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Joined: Oct 2003
Posts: 11,110
North Georgia, USA
I can see it now, a parts book with a "centerfold"... Miss 1967.

laughing


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
#108562 - 01/17/07 1:12 am Re: PARTS BOOK VS. WHATS ON BIKE  
Joined: Nov 2005
Posts: 7,222
JubeePrince Online content
Life member
JubeePrince  Online Content

Life member

Joined: Nov 2005
Posts: 7,222
Back on the mainland!
Wasn't she the one with twin clear hooters????

Or was that Miss 1969......???? :rolleyes:


Cheers,

Steve Prince


'77 T140J
"Vintage Bike". What's in your garage?

"The paying customer is always right."

Fitting round pegs into square holes since 1961...

Moderated by  John Healy 


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