Valve Adjustment

Farmall Super A, AV, 100, 130, & 140 1939 - 1973

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Brooktre
Posts: 6
Joined: Fri Apr 24, 2020 2:14 pm
Zip Code: 17814

Valve Adjustment

Postby Brooktre » Thu Apr 30, 2020 5:25 pm

I recently got an Owners Manual for my International A. In it, I see that the valves should be adjusted every 400 hours. I've owned this tractor for nearly 30 years and other than change the oil / filter and grease the fittings have done very little maintenance. I did change the transmission, rear axle fluid and coolant not long after I got it. I use it to cut grass and probably put 40 - 60 hours a year on it. It starts right up and runs well. Burns some oil. It is stored under roof.

What else should I look at when adjusting the valves to a clearance of 0.014 inch?

Are there any reasons to consider not to adjust the valves?

inairam
5+ Years
5+ Years
Posts: 1678
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v
1975 with homemade mower 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 6 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Valve Adjustment

Postby inairam » Thu Apr 30, 2020 7:49 pm

I can not say for the A family of tractors but from my experience with cubs adjusting the valves should really be considered part of the complete tune-up with spark plugs, points, condenser, timing.
When you only have 9 horsepower you need to know the names of all of the ponies!

Jim Becker
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Re: Valve Adjustment

Postby Jim Becker » Thu Apr 30, 2020 10:56 pm

There could be uneven wear on the tips of the rocker arms where they contact the valve stems. Be aware of it as you may not be measuring what you think.

Brooktre
Posts: 6
Joined: Fri Apr 24, 2020 2:14 pm
Zip Code: 17814

Re: Valve Adjustment

Postby Brooktre » Fri May 01, 2020 7:46 pm

I was looking at it again today after reading that the Farmalls of that era had the same serial number on the tractor and engine. I was surprised to see that my serial numbers matched! The block was labeled 11-12-P which fits with the serial number dating of 1946.

When scraping the paint off of the serial number I couldn’t help but notice some oil stains showing some leakage from the head gasket. I think what I’m going to do is use it this summer and plan on some engine work this fall. I’ll do a compression check and see what that reveals and start a list for repairs. I don’t know about the compression, but other than burning oil it starts easily seems to run well. The only time it smokes (visible) is if you’ve been running to get it hot and then you let it idle for a bit. It will then smoke a little, but it clears up when you throttle back up.


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