212 grader with sick pony

[invisabledog]

Decided to check out my pony motor on the grader. Figured I'd need it running to help check out the main diesel. It turns over, but no compression or spark. Lots of end play in the crank. Looks like it will need a rebuild. I don't really want to convert it to direct start. I like the old pony's. Anyone know how hard parts are to get for rebuild? Anyone have a good pony that will fit? It's a mod 212 1r247 engine number is 20p3476. Also need the glass bowl for the fuel valve, or a complete valve. Thanks all.

[CarlsCAT]

Start out by getting parts numbers...and search Machinery Trader...or your local CAT dealer...The glass bowls are available...
Respy, Carl

[gemdozer]

I have the glass bowl with the valve ass. and maybe you just need to change the front bearing and for the compression the valve should stuk open

[invisabledog]

I'm hoping the compression problem is stuck valves. I'm going to pull the heads, next. It looks like the reason they stopped using it was the battery died. Instead of buying a new one they just towed it to start.

[zootownjeepguy]

Invisabledog, I feel your pain!
The valves in the pony motor come out fairly easy with the valve, guide, spring and keepers all as a unit and held in with a snap ring type retainer. The only problem being that you need to remove the intake Manifold (the whole top of the pony motor) in order to get to them. With all of my recent experience with these @*?#!(&/;%^$ pony motors, the manifold studs like to seize around the exhaust outlets. Keep the fire-wrench handy! If you can get the valves freed up you might get away with just lapping them in place. Good Luck!

[invisabledog]

I'm a glutton for punishment. I like to keep things original. I like having the pony start, so if it needs rebuilt, I'll do it. And thanks for the good luck, I'll need it. lol.

[deetwocat]

too bad that you could not go down to the auto supply shop and buy a can of compression like we used to tell the kids that did not know to much back in high school auto class.

[invisabledog]

I did go to the auto parts and get some elbow grease, than stopped by the airport for a bucket of prop wash. lol

[tarquj]

Just a thought, be sure the drain valves at the tops of the heads are sealing off good. you'll get no compression if those babies are open or leaking. Could be an easy fix.....

[invisabledog]

First thing I checked and they were ok. I don't have the kind of luck that leads to easy fixes. lol.