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Old 03-25-2010, 08:52 PM   #1
Hodakaguy OP
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Clark 4500HP 12 Cylinder Engine - Piston/Liner Replacement Pics

Just got back from working on a 4500HP Clark 2 cycle, 12 Cylinder Natural Gas Fired Engine/Compressor Unit. We had to change out a couple cylinder liners, Pistons, Rods ect.

I took a few pictures to share in case anyone else likes large industrial engines.




Here's one of the Units, My co-worker standing in front of the cylinder heads taking some pics. You can see the three compressors that the 12 cylinder engine drives. The reciprocating motion of the crankshaft is transformed via cross heads into linear motion to drive the compressors. These compressors compress natural gas.




Taken from the top of the cat walk from one of the units, looking at the unit that's being worked on.




Cylinder heads. 6 Cylinders on each side. You can see the air intake manifolds for both banks.




Here's a shot of my ugly mug...




Here you can see the oil cooler along with some of the coolant/oil lines. This unit is massive!




Here Dean is standing in front of the mechanical oil pump, look at the size of the block on this bad boy




Here I'm standing in between two of the three double acting compressors that the engine drives. You can really see how big they are in this shot. On the ground you can see a cylinder head in the bottom left corner of the pic.




Here I'm standing next to a new chrome cylinder liner, we just finished prepping this liner for install.




Installing the new liner.




Looking into the block. You can see the intake and exhaust ports. A co-worker is cleaning inside the crank case, gives a good reference to the size of the crank.




Piston with the Master Rod attached.




Piston with the Link Rod attached. Only the master rod attaches to the crank shaft, the opposite link rod attaches directly to the master rod via a link pin.




Here the piston crown is separated from the skirt. The pistons are a 3 piece unit. Look at the size of the crank pin bearings!




New parts getting ready to be assembled. Master Rod with Hanger, Link Rod, Link Pin, Piston Pin ect.




Assembled piston on the piston stand.




Spare Turbo Chargers


Thought you might like a look.

Hodakaguy
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Old 03-25-2010, 09:18 PM   #2
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cool. got a .wav file of it running?
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Old 03-25-2010, 09:22 PM   #3
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pretty cool
is that a compresor a gas distribution line? or something else
just glad i wasn't the one in the engine block
bet thats fun to start back up
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Old 03-25-2010, 09:24 PM   #4
AKjeff
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Thanks for sharing those, I love big engines.
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Old 03-25-2010, 09:28 PM   #5
EvilGenius
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Whats the advantage of giant piston engines over a similarly rated turbine engine?
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Old 03-25-2010, 09:52 PM   #6
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Nice job. Looks like they are cleaner than big diesels to work on.
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Old 03-25-2010, 09:53 PM   #7
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Very cool.
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Old 03-25-2010, 10:47 PM   #8
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Quote:
Originally Posted by andruboz
cool. got a .wav file of it running?
Sorry, no vid

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Old 03-25-2010, 10:51 PM   #9
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Quote:
Originally Posted by fz6kd7
pretty cool
is that a compresor a gas distribution line? or something else
just glad i wasn't the one in the engine block
bet thats fun to start back up
Yeah it compresses/pumps natural gas for a main line gas pipeline.

Getting in the crank case of this engine is no problem at all, you have to be a lot more flexible on some of the smaller engines.

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Old 03-25-2010, 10:53 PM   #10
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Quote:
Originally Posted by EvilGenius
Whats the advantage of giant piston engines over a similarly rated turbine engine?
Depends, Reciprocating engines will handle a wider range of differential, the diffenerence between the suction and discharge pressure on the unit. It's also more fuel efficient than a turbine. There are quite a few +'s and -'s to each, depending on where/what application they are going to be used in.

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Old 03-26-2010, 01:11 AM   #11
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Thanks for the photos. That's really cool. I'm still as fascinated by big machines as I was at six years old.
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Old 03-26-2010, 03:27 AM   #12
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What is the RPM when it's operating?
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Old 03-26-2010, 04:24 AM   #13
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Quote:
Originally Posted by adam_c_eckhardt
What is the RPM when it's operating?
300RPM

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Old 03-26-2010, 04:46 AM   #14
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That is flat bad assed !

Very cool. How many days were you there for that job ? How many man hours does the book call for on that pup ? Why not a 4 stroke???

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Old 03-26-2010, 04:53 AM   #15
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You think I could borrow one of those "spare" turbo's for my bike?
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