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JC-WI 
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Joined: 11 Sep 2009
Location: wisconsin
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 Posted: 19 May 2024 at 7:42am |
Yea, does the water pump or the generator/alternator turn freely? Could the camshaft have gauld in the bearings? can he wiggle the governor to feel gear teeth backlash? Looking at the 'fork, the weld looks funky, like somebody welded a new fork on, would have thought a factory weld would have been soother than that. Wait, weren't those forks bolted on so you could remove them to replace seals and bushings? Where did the screws/bolts go to?
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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
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Posted: 19 May 2024 at 7:50am |
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Is that yellow snot some previous liquid 'gasket' material ???
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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DrAllis
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Joined: 12 Sep 2009
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Posted: 19 May 2024 at 7:53am |
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This is getting ugly. Got the oil pan off with conn rods disconnected. Sure hope all the rod caps got marked.
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steve(ill)
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Location: illinois
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Posted: 19 May 2024 at 8:25am |
you pulled the rod caps off and the pistons "MOVE"... but how much and what direction ... Is it worth pulling the valve cover off and looking at the valves to see if one dropped ?
When you say the motor "will not turn".. is that not at all, or several degrees in one direction and then back ?
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Les Kerf
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Joined: 08 May 2020
Location: Idaho
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Posted: 19 May 2024 at 8:41am |
 JC-WI wrote:
... Wait, weren't those forks bolted on so you could remove them to replace seals and bushings? Where did the screws/bolts go to? |
Yikes! Where indeed?
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Chugach
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Joined: 30 Nov 2023
Location: Alaska
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Posted: 19 May 2024 at 12:41pm |
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It does have a loader with an internal hydraulic pump. The fan does move.
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steve(ill)
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Location: illinois
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Posted: 19 May 2024 at 12:47pm |
the fan turning proves that the water pump is not locked up... Why DR asked about the loader is that many have a hydraulic pump driven off the front of the crank... and the PUMP can lock up and cause the engine to NOT turn over...... maybe loosen up / remove the drive coupling / etc and test...
same thing with an alternator or air conditioner.. If they LOCK UP, that can cause the engine problem..
Edited by steve(ill) - 19 May 2024 at 12:49pm
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Like them all, but love the "B"s.
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Chugach
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Posted: 19 May 2024 at 2:27pm |
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Tractor has a loader with an internal hydraulic pump. Fan does turn.
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Lars(wi)
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Joined: 14 Sep 2009
Location: Permian Basin
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Posted: 19 May 2024 at 2:34pm |
Chugach wrote:
Tractor has a loader with an internal hydraulic pump. Fan does turn. |
Make sure the fan is not slipping on the belt, if possible check somehow, when turning the fan and belt, the crankshaft is also turning.
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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
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Chugach
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Posted: 19 May 2024 at 3:37pm |
 Thank you everyone for your input, what a great blog! Anyone want to buy a slightly used D15  I tried to wiggle governor, no wiggle. I believe the yellow snot is old gasket. I am not sure about welded forks, previous owner. I moved pistons up down slightly. The motor does not move also cam pulley for fan.
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steve(ill)
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Posted: 19 May 2024 at 4:08pm |
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what is driving the loader pump ? Somehow it gets rotation from the engine..
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Like them all, but love the "B"s.
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Chugach
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Location: Alaska
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Posted: 19 May 2024 at 4:27pm |
 This is the hydraulic line.
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Les Kerf
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Location: Idaho
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Posted: 19 May 2024 at 5:57pm |
Chugach wrote:
... I tried to wiggle governor, no wiggle... |
Hmmm...  If the trouble lies elsewhere such as the hydraulic pump being locked up, etc. there should still be at least a smidgen of backlash between those gears, especially on a well-used engine such as yours.
Looks like the front of the engine may need to come off 
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Chugach
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Posted: 19 May 2024 at 7:28pm |
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Yeah unfortunately that seems to be the road ahead. I do appreciate everyone’s suggestions. My only wish is that I had put a t on the end of the NO so the title read “Engine will not turnover”
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
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Posted: 19 May 2024 at 8:34pm |
Another long shot would be a snapped cam shaft, or some kind of debris in the gear train... 
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Chugach
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Posted: 20 May 2024 at 5:03pm |
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I put a big pipe wrench on the camshaft pulley, went counter clockwise and got 3/4 turn and it stopped.
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steve(ill)
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Posted: 20 May 2024 at 5:39pm |
crankshaft pulley ?
have someone watch the valves and see if both ends of the camshaft are moving ( not broke)... valves moving on both ends (#1 and #4)..?
Edited by steve(ill) - 20 May 2024 at 5:42pm
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Like them all, but love the "B"s.
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jaybmiller
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Location: Greensville,Ont
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Posted: 20 May 2024 at 5:50pm |
I put pipe wrench on PTO shaft, engaged PTO, tranny in neutral,.....to turn engine over. That was 24 years ago....
You have pulled all the spark plugs out ??
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
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Posted: 20 May 2024 at 6:35pm |
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I may have missed something. If i did overlook this. I believe id tie the clutch down and make sure its not something in the drive line
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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Chugach
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Posted: 20 May 2024 at 6:42pm |
 I need to get my eyes checked. Seems like something is missing. Again thank you all very much for your help. Chugach
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DrAllis
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Posted: 20 May 2024 at 6:45pm |
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BINGO !! dropped the number 1 exhaust valve. Will need at least one piston and head repairs.
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8070nc
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Posted: 20 May 2024 at 8:24pm |
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Not a great turn of events but im glad you found it
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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steve(ill)
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Posted: 20 May 2024 at 8:29pm |
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how may hours on the engine ? .... Head will be off... is it worth doing a valve job and pulling all the pistons / new rings ??
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Like them all, but love the "B"s.
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DrAllis
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Posted: 20 May 2024 at 8:38pm |
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There was a time 40 yrs ago when you could have bought one piston and maybe one sleeve. In recent years buying a "motor kit" was impossible as no one even made them for a G-160 engine. Don't know if that is still true or not.
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steve(ill)
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Posted: 20 May 2024 at 9:47pm |
You can buy a "KIT" for a complete overhall... Dont know if you can get one piston or not.. or if it would match the original ???..... Unless you get a used on on e-bay.
Edited by steve(ill) - 20 May 2024 at 9:48pm
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Like them all, but love the "B"s.
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steve(ill)
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Posted: 20 May 2024 at 10:00pm |
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Like them all, but love the "B"s.
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Chugach
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Location: Alaska
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Posted: 21 May 2024 at 3:11pm |
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Thanks for the piston sites. I blew a head gasket last year, and had the head resurfaced and new valves. I did not replace the pistons. I am just glad I didn’t rip into the timing gear cover.
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Fred in Pa
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Joined: 13 Sep 2009
Location: Hanover Pa.
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Posted: 21 May 2024 at 7:43pm |
This was one of my customers last fall . MF 65 176 Cont. Gas .
He was bush hogging when valve dropped .
Don't forget to pull rocker arm assembly apart.
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He who dies with the most toys is,
nonetheless ,still dead.
If all else fails ,Read all that is PRINTED.
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Chugach
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Posted: 21 May 2024 at 7:55pm |
Wow! That’s what I have to look forward to. Thanks for the advice and pictures! 40 degrees and rain today, not conducive for playing with tractor. I will attach pictures of my dilemma. I have high hopes that all I have to do is replace the valve … just kidding!
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Chugach
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Posted: 21 May 2024 at 7:58pm |
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Mine happened after removing 3 1/2 feet of wet November snow from driveway. But when I gave it a break and restarted.
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