TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

Allis Chalmers	Case	Farmall IH	Ford 8N,9N,2N	Ford
Ferguson	John Deere	Massey Ferguson	Minn. Moline	Oliver

Farmall & IHC Tractors Discussion Forum

intalling step head pistons in an (h)

Welcome Guest, Log in or Register

Author

Jonathan Mirgon

03-16-2004 22:55:43

Report to Moderator

I have a 42 H that was distillate , someone changed the head and it now has a 300 head, I ordered step head pistons for it, which way do the pistons install ? tallest part of the piston towards the cam side or intake/exhaust side.

[Log in to Reply] [No Email]

Thanks for all your repli

03-17-2004 07:18:24

Report to Moderator

Re: intalling step head pistons in an (h) in reply to Jonathan Mirgon, 03-16-2004 22:55:43

thanks for your help

[Log in to Reply] [No Email]

riverbend

03-17-2004 06:33:56

Report to Moderator

Re: intalling step head pistons in an (h) in reply to Jonathan Mirgon, 03-16-2004 22:55:43

The 'fire crater' should go on the camshaft side - same as the numbered side of the rods. The domes fit into the valve recess in the head.

Set one of the pistons on the head and see if the dome fits into the valve pocket. If that is good, it should be alright, but you will want to be sure.

Once you have the motor mostly together, you can check for interference in the motor by setting the head on the block (without the head gasket) and slowly turning the motor over by hand. If the pistons do not hit the head, they won't hit it with the gasket installed either. In theory, you only need something like 0.050" between the head and the piston. In reality, you will probably have something like 0.35"

On my H the domes measured about 20ccs and the valve recess measured around 120 ccs (my best recollection), so there should be plenty of room.

[Log in to Reply] [No Email]

03-17-2004 06:32:17

Report to Moderator

Re: intalling step head pistons in an (h) in reply to Jonathan Mirgon, 03-16-2004 22:55:43

Most pistons are marked front or have an arrow on them pointing front. The dome of the piston must match so it can go into the head chamber. You can machine top of piston if it hits, it will hit the edge of the flat part of the head. I have done this more than once on an "M", should be the same procedure on the "H". With a "300" gas head you may be OK, the straight edge of the combustion chanber will be beveled.

[Log in to Reply] [No Email]

justin

03-17-2004 06:00:19

Report to Moderator

Re: intalling step head pistons in an (h) in reply to Jonathan Mirgon, 03-16-2004 22:55:43

Unfortunately you may run into a situation where you cannot use the step head pistons in the tractor due to the cylinder head. The steps on the pistons are designed for the specific cylinder head used on the model of tractor, and you may run into a situation where the piston will touch the top of the cylinder head. Take careful measurements of the pistons before you install anything, as you may have to install flat tops.

[Log in to Reply] [No Email]

Aces

03-17-2004 05:29:01

Report to Moderator

Re: intalling step head pistons in an (h) in reply to Jonathan Mirgon, 03-16-2004 22:55:43

Jonathan Take a look at the head the dome of the piston needs to go up past the step in the head or they will hit and not turn over.

[Log in to Reply] [No Email]

JOE

03-17-2004 05:20:30

Report to Moderator

Re: intalling step head pistons in an (h) in reply to Jonathan Mirgon, 03-16-2004 22:55:43

Jonathon, most pistons will have an arrow, or some other marking which should point to the front or radiator when installed.

[Log in to Reply] [No Email]

[Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home | Forums

Copyright © 1997-2023 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy