john deere 620 engine specs wanted.

[caleb in pa]

What is the bore/stroke on a john deere 620, what are the valve intake/exhaust sizes, what is the duration/lift of the cam, what type of lifters are they- solid or hydraulic? what is the connecting rod length, rod to piston ratio? pictures of a 620 piston and rod would be nice. What is the compression ratio? thank you- Caleb

 

[buickanddeere]

1-800-522-7448 and order the service manual

 

[caleb in pa]

i have a service manual and it says nothing about comp ratio or other sizes, thank you.

 

[buickanddeere]

Service or operator's manual?
In fact there wasn't even a 620 service manual the last time I tried to order one. They just subbed the 60's manual and said good luck. If there is a 630 service manual then everything is in there.
There is a fellow who was selling the Deere Two Cylinder tech upgrades for the Dealer's manuals. I have two binders full here up to the last two cylinder entry in 1963. Every little spec is in there.
Don't know if Dwayne is still selling them or not. A tremendous amount of work for the few dollars he charged.