Hello everyone.
Just joined and I'm looking for information and advice on my Kohler CH20 Command.
I acquired a nice John Deere F620 FMM with a blown engine @ 1100 hrs.
I located a replacement CH20 (spec. 64638) with 214 hrs. out of a 2544 Cub Cadet.
The original engine was a spec. 3134, I believe.
They appeared nearly identical except for the fuel pump configuration.
I pulled this engine down to the shortblock for inspection, and it was very clean and
reflected what I believed to be accurate hours.
Everything was reassembled per the Kohler service manual, with genuine Kohler gaskets and seals.
I installed it, it fired right up, and it ran beautifully.
I mowed for 2 hours, and it used just a little over 1qt. of oil, and showed a slight amount of smoke from the exhaust.
There are no external leaks at all.
I ran a compression check and a leakdown test. #1@ 105psi. and #2@ 110psi. with minimal leakdown.
I checked the crankcase breather, and the reed valve is intact and appears to be working.
At this point I must admit, I have limited experience with small air cooled engines.:redface:
Everyone I talked to locally suggested I re-ring it. I really didn't know.
At any rate, I pulled it back out, ordered a Std. ring kit and gaskets, along with valve seals, and a set of fresh plugs.
Upon dis-assembly, I found .050 crankshaft end play that wasn't there before.
Kohler spec. is .02 - .023, and I had .015 when it went together the first time.
What I found was a scarred block thrust surface and crankshaft face on the flywheel end.
Has anyone repaired one of these Command blocks?
I'm thinking resurface the thrust area of the block and clean the crankshaft face up.
Can this be fitted with a bronze thrust washer of the appropriate thickness to make up the difference?
BTW, this mower was intended for resale, so dropping in a new $2000 engine is not an option.
Thanks in advance.
.
Just joined and I'm looking for information and advice on my Kohler CH20 Command.
I acquired a nice John Deere F620 FMM with a blown engine @ 1100 hrs.
I located a replacement CH20 (spec. 64638) with 214 hrs. out of a 2544 Cub Cadet.
The original engine was a spec. 3134, I believe.
They appeared nearly identical except for the fuel pump configuration.
I pulled this engine down to the shortblock for inspection, and it was very clean and
reflected what I believed to be accurate hours.
Everything was reassembled per the Kohler service manual, with genuine Kohler gaskets and seals.
I installed it, it fired right up, and it ran beautifully.
I mowed for 2 hours, and it used just a little over 1qt. of oil, and showed a slight amount of smoke from the exhaust.
There are no external leaks at all.
I ran a compression check and a leakdown test. #1@ 105psi. and #2@ 110psi. with minimal leakdown.
I checked the crankcase breather, and the reed valve is intact and appears to be working.
At this point I must admit, I have limited experience with small air cooled engines.:redface:
Everyone I talked to locally suggested I re-ring it. I really didn't know.
At any rate, I pulled it back out, ordered a Std. ring kit and gaskets, along with valve seals, and a set of fresh plugs.
Upon dis-assembly, I found .050 crankshaft end play that wasn't there before.
Kohler spec. is .02 - .023, and I had .015 when it went together the first time.
What I found was a scarred block thrust surface and crankshaft face on the flywheel end.
Has anyone repaired one of these Command blocks?
I'm thinking resurface the thrust area of the block and clean the crankshaft face up.
Can this be fitted with a bronze thrust washer of the appropriate thickness to make up the difference?
BTW, this mower was intended for resale, so dropping in a new $2000 engine is not an option.
Thanks in advance.
.