Compression test without starter

All other non-specific model Farmall / IH / CASE tractors. (Catch-All)

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.

Compression test without starter

Postby Bowen » Sun Jul 24, 2011 6:42 pm

My '47 H, Arby, is proving himself to be a tired old fella. I'd like to run a compression test but I use a hand crank. How would I go about getting an honest reading without a starter providing the adequate cranking speed?
Bowen
 
Posts: 47
Joined: Mon Jan 24, 2011 11:10 pm
Location: Elkton, MD
Zip Code: 21921
Tractors Owned: .
49 Cub
47 H
39 JD B
48 Massey-Harris 22
Gravelys (gobs of 'em)
Circle of Safety Award
Circle of Safety: Y

Re: Compression test without starter

Postby ricky racer » Sun Jul 24, 2011 6:54 pm

Pull all the spark plugs and spin it over. Take dry readings then put about a tablespoon of oil in each cylinder and try it again for wet readings. You don't need a starter to get the compression readings.
1929 Farmall Regular
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub
User avatar
ricky racer
5+ Years
5+ Years
 
Posts: 2797
Joined: Wed Sep 12, 2007 8:40 pm
Location: Niles / Buchanan, Michigan
Zip Code: 49120
Circle of Safety Award
Circle of Safety: Y

Re: Compression test without starter

Postby Eugene » Sun Jul 24, 2011 7:49 pm

Do as Ricky says. 4 or 5 compression revolutions (8 or 10 full engine revolutions) per cylinder test.

You will not be able to spin the engine over at 150 rpms. Just as fast as you can. So readings may be a bit low.

Run the tests, record the results. Report back.
I have an excuse. CRS.
Eugene
Team Cub Mentor
Team Cub Mentor
 
Posts: 12521
Joined: Fri Jul 02, 2004 9:52 pm
Location: Mo. Linn
Zip Code: 65051
Circle of Safety Award
Circle of Safety: Y

Re: Compression test without starter

Postby Boss Hog » Sun Jul 24, 2011 8:01 pm

you can take one pug out and install the tester and start it up , do the same the the other cylinders
the results with be the same as checking it with the starter, and save your arm :D
IN GOD WE TRUST
All others pay cash
Boss Hog
Power corrupts; absolute power corrupts absolutely byJohn Emerich Edward Dalberg
User avatar
Boss Hog
Cub Pro
Cub Pro
 
Posts: 9804
Joined: Mon Oct 24, 2005 8:35 pm
Location: VA. Randolph
Zip Code: 23962
eBay ID: dmb2613
Circle of Safety Award
Circle of Safety: Y


Return to Farmall / IH / CASE

Who is online

Users browsing this forum: No registered users and 1 guest