JD 40 Compression

jerryinga · Sep 19, 2018

On a JD 40 1953. Is the compression the same on an All Fuel as with a straight gasoline

James Howell · Sep 19, 2018

"[b:654c4848f0][i:654c4848f0]Is the compression the same on an All Fuel as with a straight gasoline[/i:654c4848f0][/b:654c4848f0]"

No.

Reviewed the [b:654c4848f0]SERVICE MANUAL SM-2013 JOHN DEERE 40 SERIES TRACTORS & CRAWLERS[/b:654c4848f0] in the [b:654c4848f0]Section 40 TRACTOR TUNE-UP AND ADJUSTMENT[/b:654c4848f0] section under the [b:654c4848f0]COMPRESSION TEST[/b:654c4848f0] topic on page 40-5-2.

"[i:654c4848f0]7. Note pressure gauge reading.

The compression reading of a new engine (with rings seated) should be as follows: Gasoline - 125 psi; All-Fuel - 85 psi. Repeat this test on No. 2 cylinder. Pressure should not vary more than 10 pounds between the cylinders.[/i:654c4848f0]"

Hope this helps.

jerryinga · Sep 20, 2018

Thanks again James, looks like you are my go to man for info on the 40"s
With your help I got my lift working yesterday changed the fluid and went out and picked up a large bail of hay Drop me an email sometime

James Howell · Sep 20, 2018

"[b:654c4848f0][i:654c4848f0]looks like you are my go to man for info on the 40"s[/i:654c4848f0][/b:654c4848f0]"

Try to answer questions if I can.

Figure with the operator's, parts, and service manuals some questions have "[i:654c4848f0]open book[/i:654c4848f0]" answers.

JD 40 Compression

jerryinga

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James Howell

Well-known Member

jerryinga

Member

James Howell

Well-known Member

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