• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

Dog Bolt Removal

Share this page

rlandrum

rlandrum

Jedi Trainee
Offline
It may be time to order that Bently manual. Neither of my books include any information about the removal of the dog bolt.

I need to remove this to repair or replace the crank pulley, which is cracked.

How is this done? When replaced, how many foot pounds should I torque it to?

A bently is in my future. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif

Oh... And in which direction does the engine rotate, as observed from the driver seat? I know I read this before, but now can't find it or remember where I read it.
 
bash

bash

Jedi Trainee
Country flag
Offline
If you mean the big bolt at the front end of the crankshaft, I just removed mine last night. I was told to use an impact wrench, but that didn't do anything for me. In the end I put a pipe wrench on the extension and used a 1 1/8 inch ring spanner on the botl, and it came free without too much hassle. I think the torque to replace is 105 lbft, but someone with a manual handy will confirm that, I am sure. I am replacing with Rick Patton's fan eliminator, which I think uses 90 lbft.

Engine rotates clockwise if you look are looking at the front, so counter clockwise from the driver's seat.

Hope that helps
Alistair
 
B

BryanC

Jedi Hopeful
Offline
A quick zip with my impact wrench and mine came right off. I don't see a torque value in the Bentley manual but Haynes says 90-100 lb-ft.

Bryan

edit: Oops - those are for a TR6 I see in your profile you have a 3A.
 
G

Guest

Guest
Guest
Offline
As I remember, getting that pulley off can be a trick. I think I bought and modified a 3-fingered cheap gear puller from NAPA and got it to fit inside the gaps in the pulley and used a set of flat washers to push against the crank face. Isn't that pulley keyed? Used a piece of pipe to drive it back on, as memory serves me. My memory gets fogging when I try and recall distasteful tasks.
 
PeterK

PeterK

Yoda
Offline
For TR3-4A use an impact wrench; if it won't budge, tighten it with the impact for a SECOND, then try to back it off. Repeat. Use a good 1/2" impact, cheapies don't have the torque.

You can separate the pulley 1/2s by removing the 6 1/4" bolts but MARK THE ORIENTATION of the pulley halfs in relation to the hub as there is a hole drilled in one side of the pulley for timing. The center hub should come off the crank with a little penetrant and puller if it's stuck. It is keyed and the key might be a little rusty from sitting.


If you are going this far be sure to continue and remove the timing chain cover and replace the chain and tensioner while you're in there.
 
G

Guest

Guest
Guest
Offline
Bugeye58 said:
Bill, that pulley should be a snug slip fit, and shouldn't ever have to be driven home.
Jeff
Click to expand...

Again, I cannot remember what I had for breakfast.
 
G

Guest

Guest
Guest
Offline
Bugeye58 said:
TR6BILL said:
Again, I cannot remember what I had for breakfast.
Click to expand...

Andouille? /bcforum/images/%%GRAEMLIN_URL%%/grin.gif
Jeff
Click to expand...


I think I may have had that yesterday, cut into tiny bits and browned then scrambled into some nice fresh yard eggs.

Almost as good as grillards and grits!
 
martx-5

martx-5

Yoda
Country flag
Offline
TR6BILL said:
Almost as good as grillards and grits!
Click to expand...

OK, I know what grits are, but dem der grillards need sum 'spainin' to this New Yawka.
 
AltaKnight

AltaKnight

Jedi Knight
Offline
martx-5 said:
TR6BILL said:
Almost as good as grillards and grits!
Click to expand...

OK, I know what grits are, but dem der grillards need sum 'spainin' to this New Yawka.
Click to expand...

Might be deep fried road kill?
 
T

TRDejaVu

Guest
Guest
Offline
I see from another thread of yours that you have the oil pan removed. When I needed to do the same thing, I just put a block of wood in place to stop the crank from turning. I then applied an even load to the bolt (not shock load) and it came loose really nice. Did the same putting it back together, with no issues.
 
OP
rlandrum

rlandrum

Jedi Trainee
Offline
Haha. It's supposed to be hex, I take it. It's rounded over quite badly then. And painted, I'm guessing, in delicious lead based paint.

This is going to be fun. I'll see if I can hammer on something close to 1 1/8th socket to see if I can get it moving. After looking at it last night, I assumed it required some sort of special adapter to fit into the dog ears to remove; that's how rounded over it is.
 
A

Adrio

Jedi Knight
Country flag
Offline
Mine was a pain to get off. That engine had sat 20 years or more with no attention while sitting in a car in a hedge. Anyhow, I got it off with an impact wrench but it took several minutes of 'impacting' over a few sessions before it coma off. Whatever you get on to that bolt make sure you have a good purchase and it will take some torque to remove it. Patience is all it needed in the end for me.
 
G

Guest

Guest
Guest
Offline
AltaKnight said:
martx-5 said:
TR6BILL said:
Almost as good as grillards and grits!
Click to expand...

OK, I know what grits are, but dem der grillards need sum 'spainin' to this New Yawka.
Click to expand...

Might be deep fried road kill?
Click to expand...

Grillards is marinated, thin sliced eye-of-round (beef) cooked in a wine sauce and served with grits. Heaven.

If you find a cow on the road, so much the better.
 
OP
rlandrum

rlandrum

Jedi Trainee
Offline
I got it off last night. I put the 1-1/8th on and it spun off first try. I got lucky. Only bad part was I had to by $80 worth of airline to run from the garage to the basement.

Now I'm stuck with the fan extension. I'll take the gear puller to it tonight to see it'll budge. I also have a slide hammer I could try...

Is it in fact keyed? I got somewhat mixed replies above...

I'll mark it's position, just to be safe.
 
TR3driver

TR3driver

Great Pumpkin - R.I.P
Offline
The fan extension is bolted to the hub, which in turn is keyed to the shaft. However, note that the timing mark is on one of the pulley halves, and they are not keyed, so can be assembled to the hub in the wrong position. The timing mark goes opposite the keyway (as mentioned in the shop manual).

It does sometimes take some persuasion to slide it off; which is complicated by lack of anything for the puller to bear against. I've found that usually, some determined tapping with a brass faced hammer around the backside of the fan flange will coax it off. But in an extreme case, you may need to provide something for a puller screw to bear against.

Since mine is currently mounted with Loctite, it falls into the second category ... I found a long bolt that would engage the crank threads without coming up against the hub/extension and used a "harmonic damper" puller to get mine off last time. The original bolt doesn't work so good because of the pilot hole (& dog teeth) built into the head.
 
OP
rlandrum

rlandrum

Jedi Trainee
Offline
I've got the fan extension bolts off, but it just wouldn't release from the hub... Even with the very mild persuasion of my BFH (2lb sledge).

Do you recall the size and threading of that dog bolt? As I recall, it was fine threading, but not sure if it's 1/2 or perhaps a little larger.
 
Similar threads
Thread starter Title Forum Replies Date
K TR2/3/3A TR3 starter dog bolt removal.... Triumph 9
C TR2/3/3A removal of dog bolt for crank start tr-3 Triumph 10
KVH General Tech Dog Bolt Torque—Crankshaft Triumph 11
S TR2/3/3A Tightening the crank pulley dog bolt on a tr3 Triumph 7
B TR4/4A Starter dog bolt Triumph 15
KVH General TR Front Dog Bolt and Fan Balancer Piece Triumph 1
KVH General TR That Front Fan Dog Bolt Again--Torque It Triumph 7
K TR2/3/3A TR3 starter dog bolt torque value? Triumph 1
T TR4/4A TR4 Fan Extension Dog Bolt Torque Triumph 4
Tinkerman TR2/3/3A TR3 Crank Dog Bolt & Double Wire Clamp Question Triumph 5
Tinkerman TR2/3/3A TR3 Cranking Dog Bolt Position Triumph 6
J Crankshaft dog nut and timing chain cover removal advice Austin Healey 30
vette MGB Rear Fender Dog Leg Patch Panel MG 3
D TR2/3/3A TR3A Crank Dog Triumph 2
H driving dog [gear] for distributor? Austin Healey 17
GTP1960 TR2/3/3A Restore project Drove my dog to drink! Triumph 1
K TR2/3/3A Distibutor drive dog pin removal? Triumph 8
PatGalvin TR2/3/3A TR3 PS Quarter Panel Dog Leg needs a good home Triumph 2
S TR2/3/3A tr3 leather cockpit capping dog leg Triumph 4
T TR2/3/3A tr3 dog leg replacement on pre-60k Triumph 4
V Dog? Maybe not Triumph 4
Superwrench Dog leg on 3000 Austin Healey 5
JohnnyMead TR2/3/3A Trimming the Dog-Leg Capping on a TR3 Triumph 9
RickB Beautiful Fall day in NW took the dog for a ride! Spridgets 17
jlaird Dog gone it. Spridgets 11
aeronca65t Corolla Hot Dog Other Cars 10
M Distributor Drive Dog Removal Triumph 8
G Now how exactly do I make a drive dog to prime oil Triumph 8
jlaird Out walking the dog this morning early Spridgets 2
D Those red dog legs...Beware MG 5
D Dog leg fit MG 6
bluemiata90 TR2/3/3A Like a dog chasing it's tail ,,,TR3 troubles Triumph 17
G NEED A QUICK ANSWER...setting drive dog for dizzy Triumph 8
pcanonge Dog food for Kitty? Jaguar 10
jlaird You know it is the Dog days of Summer when Spridgets 2
jerrybny Felt Like a Hot Dog in a toaster oven today. Triumph 10
wkilleffer MGB 1974 MGB distributor drive dog- which one is it? MG 8
S dog leg repair panels Austin Healey 6
kch Cranshaft nut/starter dog-tighten ? Austin Healey 3
Jkirchner Rocker Pedestal Banjo Bolt Thread Size Austin Healey 10
K TR2/3/3A Cylinder Head Bolt question.... Triumph 3
S TR2/3/3A old 4 bolt axle set up Triumph 12
D TR2/3/3A cylinder head oil plug bolt size Triumph 6
S TR2/3/3A old 4 bolt axle differential. Triumph 11
JPSmit A fairly specific looking bolt Spridgets 10
F 59 bugeye spring bushing bolt Spridgets 8
A For Sale Rover V8 heads, 10 bolt Other British Classifieds 0
TR3MT TR2/3/3A Whitworth Threads (as on the bolt) Triumph 6
K TR2/3/3A Brake caliper brake pad retaining plate bolt hole? Triumph 16
R difficult bolt access Spridgets 8

Similar threads

Top