4450 trouble

Nick U · Dec 12, 2014

Using 4450 one day- ran great, no trouble. Went to start next day and it would not turn over. Took starter off and engine rolled backward fine, but when rolled forward it would come to a stop at a certain point. We took off the front hyd pump connection to isolate that- no difference. Pulled injectors to check for a hydro lock- injectors looked good and no difference. Cut apart oil filter and found nothing. Ran an oil analysis and it showed nothing bad in oil. We are going to pull the head thinking that the problem is in the top end... My question is- Are we on the right track and would there be anything in the transmission or pto that would stop the starter and prevent the tractor from turning over. It is a loader tractor with 14000 hours. It has had engine work at 10000 hours. Powershift and MFWD. Thank You for the replies.

Larry in WNY · Dec 12, 2014

Did you thoroughly clean all battery and cable connections? Our 4630 did that several times and corroded connections were the cause. They may look good but you won't know until cleaning them.

Larry

buickanddeere · Dec 12, 2014

Measure voltage while cranking. Beauty is only skin deep.

Nick U · Dec 12, 2014

New cables, new batteries, new starter. We thought the same as you guys, but our problem must be deeper.

Mike M · Dec 12, 2014

I'd pull the valve cover and oil pan for a look over to what's hitting.

dkattau · Dec 12, 2014

Could be the injection pump too.

bradinpa · Dec 12, 2014

I would almost guess that one of the bolts broke that hold c1 and c2 clutch pack to the flywheel.it is a common problem with a higher hour 50 series. it usually jams against the trans pump. The separator plates are probably worn out too.

DONMYEIL · Dec 13, 2014

I would pull the tappet cover to see if you dropped a valve .

4450 trouble

Nick U

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Larry in WNY

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buickanddeere

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Nick U

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Mike M

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dkattau

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bradinpa

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DONMYEIL

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