PDA

View Full Version : Big Bore Pinger Rebuild



smokinwrench
12-12-2010, 12:15 PM
It is a EMD (Electro Motive Diesel), 645 cubic inch per cylinder, it is a V-20, YEP 12,900 cubic inch. This is a diesel 2 stroke. Radiator wieghed right at 8,700 lbs. Complete liner assemblies wiegh 408 lbs each. Holds 525 gallons of oil. Cooling capacity 450 gallons.

A few wild/wierd features of this engine. It has a knife and fork rod setup left rod has a 2 peice rod cap and holds the right rod onto the crank. Pistons are mounted on a carrier that allows the piston to rotate in the cylinder as it goes up and down. Each liner has water jackets built into it has a water line to each liner at the bottom and 1 at the top also. The block starts out as 2 giant pieces of I beam, nothing is cast.

It powers a 2.7 megawatt generator. This is just a black start unit if we loose all power to the site, we use this to start our 75 megawatt gas turbine. The engine was rebuilt because it tripping off because of high crankcase psi. It took us about 3 days to get all of the dirt out of the engine and cleaned up good enough that I would allow us to start reassembly.

dcreel
12-12-2010, 12:21 PM
Wow.. That is awesome.. What is the time between rebuilds on something like that?

smokinwrench
12-12-2010, 12:37 PM
Normally on other big engines I have rebuilt I would say 30,000-40,000 hours.

This one was built in 1973 and has about 850 hours total. If we could have picked up all the dirt it would have been 10 gallons in the block. We used all most 50 gallons of solvent to get it clean. The old pistons an dlines looked horrible.

I have rebuilt bigger cubic inch but less cylinders, Cat came out with a V-32 a few years ago and I always wanted to rebuild one but after a 20 I have no desire to do that, way to much repetive stuff.

Bryan Raffa
12-12-2010, 06:47 PM
awesome stuff thanks for shareing! whats that loaded on the trailer?

fabiodriven
12-12-2010, 07:42 PM
whats that loaded on the trailer?

My guess is it's the radiator?

smokinwrench
12-12-2010, 07:43 PM
awesome stuff thanks for shareing! whats that loaded on the trailer?


It is the radiator, it came out in 2 halves each being about 7'x12' approximately 18" thick.