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301 diesel will only crank 1/4 turn
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Joined: 15 Sep 2019
Location: Danville ohio
Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Topic: 301 diesel will only crank 1/4 turn
    Posted: 31 Dec 2023 at 4:09pm
Gleaner f combine broke hydro pump belt put on new belt used wrench to turn motor to put plate back on that runs unload drive, all back together now will only crank over 1/4 turn exactly that was starter issues but took starter off and with wrench only 1/4 forward or backwards. Before this ran fine moved around the yard let the oldest drive it around sounded good no smoke no nothing. Where should I start, I ordered owners manual but don’t even have it yet

Guessing need to take valve cover cover off see if all valves there?

Just weird it ran fine shut it off and now this🤦‍♂️

Thanks for help

Edited by CCF - 31 Dec 2023 at 7:02pm
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Joined: 12 Sep 2009
Points: 20485 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 31 Dec 2023 at 5:05pm
Remove every belt from the front and back of the engine and determine if it still is only 1/4 turn or not before you do anything else.
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 31 Dec 2023 at 5:08pm
I did take main drive belt off and same so I’m going to take hydro pump belt back off tomorrow couldn’t see any thing but going to make sure

I’ll post update after it’s off
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Points: 3537 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 31 Dec 2023 at 6:54pm
timing , and compression 
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Points: 8239 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 31 Dec 2023 at 10:03pm
Did you put a long bolt in somewhere that's sticking too far through?
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 31 Dec 2023 at 10:10pm
I put it back with everything that came out….
So here is what im hoping for. Going along with what Dr Allis said   I didn’t look too close at belt when I put new one on old one broke so I’m hoping it’s something with the hydro pump and it burnt the belt off but that will be in the morning.
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Joined: 29 Jan 2013
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Points: 3537 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 7:48am
i dont know how my reply got on the wrong post
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Points: 11600 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 8:26am
Originally posted by CCF CCF wrote:

I put it back with everything that came out….
So here is what im hoping for. Going along with what Dr Allis said   I didn’t look too close at belt when I put new one on old one broke so I’m hoping it’s something with the hydro pump and it burnt the belt off but that will be in the morning.


I got $.25 on the hydro having a problem.
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Points: 244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GSTROM99 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 8:47am
[/QUOTE]

I got $.25 on the hydro having a problem. [/QUOTE]

Me too.  Probably why belt burnt off...
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Points: 4664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 10:46am
When it stops turning, is it a sudden (clunk) stop or kind of soft / cushioned?

Is it possible there is liquid in one (or more) of the cylinders causing hydro lock (cushioned stop)? 
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 11:28am
Update

All belts off besides fan belt. Still hits and it’s a hard hit using breaker bar on front crank   
Took exhaust manifold off it’s dry
Took hose off intake it dry
Took valve cover off all valves appear to be in springs   Nothing appears goofy on push rods

Valves are moving at rear opposite end of fan and number 2 in quarter turn so don’t think cam.

Any ideas things to check I missed?
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Points: 4664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 11:42am
A loose bolt on the flywheel or something floating around in the bellhousing?
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 11:46am
I was on agco parts page looking at taking rear pto shaft off to check in there took starter off can’t see much small holes to look in    Going to stick magnet in there also 🤞. I’m not much of engine person so any help greatly appreciated
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Points: 20485 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 11:52am
You may have a rear PTO bearing bad.
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 11:53am
Originally posted by DrAllis DrAllis wrote:

You may have a rear PTO bearing bad.


That is where I’m heading next
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A hydro lock will pass when turned backwards 2 complete turns. That will push it into the intake so look for liquid then
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Points: 8239 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2024 at 9:32pm
Reminds me of 40+yrs ago. 6-71 Detroit running fine when parked. Next morning dead miss on one cylinder. Head of piston containing rings broke free of rest and was setting at the top. Firing every stroke kept it together and running till shut down. Some things just happen.
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Points: 11600 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jan 2024 at 7:34am
Originally posted by GSTROM99 GSTROM99 wrote:



I got $.25 on the hydro having a problem. [/QUOTE]

Me too.  Probably why belt burnt off...
[/QUOTE] yep!
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jan 2024 at 7:36am
Originally posted by im4racin im4racin wrote:

A hydro lock will pass when turned backwards 2 complete turns. That will push it into the intake so look for liquid then


Can’t turn it more than quarter turn then hits
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jan 2024 at 7:37am
Originally posted by Tbone95 Tbone95 wrote:

Originally posted by GSTROM99 GSTROM99 wrote:



I got $.25 on the hydro having a problem.


Me too.  Probably why belt burnt off...
[/QUOTE] yep![/QUOTE]

Belts off still hit looking into rear pto then motor
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Points: 11600 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jan 2024 at 7:37am
But….guess not!
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Ouch
Ouch...


Edited by GSTROM99 - 02 Jan 2024 at 8:08am
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Points: 45 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CCF Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jan 2024 at 10:07am
Originally posted by GSTROM99 GSTROM99 wrote:


Ouch
Ouch...


Hoping since when shut off running fine it will not be much if any carnage just replace/reassemble what’s broke 🤞
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I am a firm believer in checking the easy things first.

I will go back to SteveM C/IL's question. Are you sure you didn't put a longer bolt in somewhere? It sure sounds like something that rotates is getting caught on something stationary. A long bolt sticking into the bellhousing would be my guess.
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