I have a 1994 JD 425 AWD with a Kawasaki 20hp engine.
I had the cam shaft (plastic gear) and valves replaced by a JD dealer after an engine failure (plastic cam gear broken). Was told then there was oil blow-by, but they didn't repair bottom end engine at their facility and I would need to take it elsewhere.
I finally got tired of the oil usage and carboned spark plug, so I pulled the engine and tore it down to replace the rings. I bought a kit with gaskets, seals, camshaft, pistons and rings...no valves, springs or pushrods.
I didn't pay attention to the pushrods when I pulled the head.
The issue: With the engine at (TDC) top dead center, I Installed the valve pushrod on #2 cylinder head, after seating the pushrod in the the solid lifter, it falls out of the of the rocker cup. If I turn the crank 180 degrees it will stay in, but with a full turn it falls out again.
Checks/ balances: With all things being equal, I switched the original pushrods, rockers, springs, and new camshaft with the same results. I checked the head for flatness, flatness of the pushrods, and measured the springs for free length. There is not enough thread on the rocker screw to adjust. The pushrod appears to be approximately 1/8 to 1/4" short of seating into the rocker.
The engine tag is missing, so I don't know what series of FD620D it is. I have contacted Kawasaki and John Deere, but they couldn't help.
Has anyone seen anything like this or have some opinions?
I had the cam shaft (plastic gear) and valves replaced by a JD dealer after an engine failure (plastic cam gear broken). Was told then there was oil blow-by, but they didn't repair bottom end engine at their facility and I would need to take it elsewhere.
I finally got tired of the oil usage and carboned spark plug, so I pulled the engine and tore it down to replace the rings. I bought a kit with gaskets, seals, camshaft, pistons and rings...no valves, springs or pushrods.
I didn't pay attention to the pushrods when I pulled the head.
The issue: With the engine at (TDC) top dead center, I Installed the valve pushrod on #2 cylinder head, after seating the pushrod in the the solid lifter, it falls out of the of the rocker cup. If I turn the crank 180 degrees it will stay in, but with a full turn it falls out again.
Checks/ balances: With all things being equal, I switched the original pushrods, rockers, springs, and new camshaft with the same results. I checked the head for flatness, flatness of the pushrods, and measured the springs for free length. There is not enough thread on the rocker screw to adjust. The pushrod appears to be approximately 1/8 to 1/4" short of seating into the rocker.
The engine tag is missing, so I don't know what series of FD620D it is. I have contacted Kawasaki and John Deere, but they couldn't help.
Has anyone seen anything like this or have some opinions?
