TEA-20 rocker/head/pushrods

[charisma1986]

hi guys, i believe i have 3x tea20 tractors, one had broken #4 conrod and destroyed the block.

i notice there is 12mm difference in the head heights, the shorter head having come off the broken block. initially i thought it may have been machined down to raise compression, but perhaps this is the correct 6:1 compression petrol head?

the pushrod lengths i see are different too, and differently shaped, and somebody has cut the ball end off each tappet adjuster on the broken block engine.

i have 3 fuel tanks, and one appears to be a vaporizing oil or lamp oil tank as it has a two way petcock and main/sub tank internally separated.

is there a way to distinguish which head height and which pushrod length i need for the petrol engine, and is there any difference in rocker geometry?

i'm trying to make 1 running tractor and see what i need to get another one running later down the track.

kind regards,
Jase

 

[Tom H.]

Hi Jase,

My question is do you have parts and service manuals? These are really helpful not just for the how to, but, also having a part number can prevent
headaches.

On youre machines I think you have a mix of 80 and 85mm engines which gives you the head difference. And I also believe you may have a TVO fuel
setup.

Email me I can help you find manuals

Tom

 

[charisma1986]

(quoted from post at 23:07:59 11/15/21) Hi Jase,

My question is do you have parts and service manuals? These are really helpful not just for the how to, but, also having a part number can prevent
headaches.

On youre machines I think you have a mix of 80 and 85mm engines which gives you the head difference. And I also believe you may have a TVO fuel
setup.

Email me I can help you find manuals

Tom

i have the haynes service manual, i think the lower head could be a vanguard head.

sure, what is your email address and i will shoot one through to you