torqued?

banjo · Jan 9, 2009

I just instaled a new head gasket on a 41 H. All i have is a cheap chinese lever type torque wrench. What are the odds that it actually is close to being right.

It also said on the gasket retorque required. So i'm going to have to run it and pull the valve cover and rocker arm assembly, retorque and set the tappet clearance. Oh the joys of working on equipment.

bruster · Jan 9, 2009

I never used them, but think the accuracy of the deflection beam wrenches is about + or - 8 / 10%
I've always used a flex head click type, because a lot of things I torqued down, you couldn't see a dial

John G. Hasler · Jan 9, 2009

> What are the odds that it actually is close to
> being right.

Pretty good, probably. Why not test it and see?

TractormanNC · Jan 9, 2009

More important than the actual torque value is that they all be as nearly equal as possible. If you are careful using the wrench, it will be OK. These engines are pretty forgiving.

NDS · Jan 9, 2009

Apparently the head bolt torque was not considered to be all that critical by IH. The owners manual lists head gasket replacement as a do it yourself job and says to tighten bolts from center working out making several passes until bolts are TIGHT with no mention of torgue value. Also says to retighten after running tractor.

banjo · Jan 9, 2009

My service manual says 70ft lbs, working from the center out on both sides.

banjo · Jan 9, 2009

what would be a way i can test it?

banjo · Jan 9, 2009

Aint that the truth. i would rather use a clicker type anyday.

rustyfarmall · Jan 9, 2009

I prefer the clicker type myself, but when I first started pulling wrenches we didn't know what a clicker type was.

banjo · Jan 9, 2009

You didnt have sorry chinese wrenches then either.

John G. Hasler · Jan 9, 2009

Put it on a bolt head that sticks out horizontally, hang a weight on the handle, calculate the torque, and compare it with the reading. Or you can use a spring scale instead of a weight and just pull on it as you would when improvising a torque wrench.

mkirsch · Jan 9, 2009

John's got the idea. Calibrate using a known weight.

The weight times the length of the wrench handle equals the torque. 20lbs on a 1-1/2 ft (18") long handle is 30 ft-lbs, for example.

The cheap chinese clicker types are precise, but not necessarily accurate. They click at the same amount of torque every time, but the setting does not necessarily equal the torque being applied.

Even expensive top-end wrenches can get out of calibration.

bruster · Jan 9, 2009

No we didn't, but when they came along. Boy! Was it nice to have a CHEAP wrench or socket to bend, grind, or weld on to make a "special tool" in a hurry

r4etired · Jan 9, 2009

In the 50's I think only the dealers even had a torque wrench. I know several Farmalls were overhauled without one and were worked for several years with out a problem.

NDS · Jan 9, 2009

Torque wrench should be used on critical fasteners BUT my Dad and our nieghbor overhauled a lot of Hs and Ms in there day and they all went out and ran about as long as original engines and they never owned a torque wrench. Never knew of them to have head gasket or rod and main problems.

torqued?

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