JD 445 with FD620d 820Hours.
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    JD 445 with FD620d 820Hours.

    I have a 1996 JD 445 with 820 hours. I am about 98% sure the plastic camshaft has broke, rocker arms are not moving up and down as they should. My question: Can all the work needed be done without removing the engine? It looks like after unbolting a few things, the front of the engine can be accessed easily.

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    TJR345's Avatar
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    Yea going to have to pull it,it'll be easier. When I did my 98 345 I took it out and went through the hole engine.I had to upgrade the valve springs due to the steel cam. I put new gov. gear oil pump gear (both were plastic) new rings water pump and so on,had about $500 in parts when all done but I have a new engine.Just didn't make sense to tear into it and not go through the hole engine.
    Tom

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    you are correct. I forgot that I would need to upgrade the valve springs. Are there anymore plastic parts that can be upgraded with steel parts? I downloaded the technical manual, and plan to start the rebuild next week. I also have a 2001 GX345, but to my understanding it has a steel cam.

    Quote Originally Posted by TJR345 View Post
    Yea going to have to pull it,it'll be easier. When I did my 98 345 I took it out and went through the hole engine.I had to upgrade the valve springs due to the steel cam. I put new gov. gear oil pump gear (both were plastic) new rings water pump and so on,had about $500 in parts when all done but I have a new engine.Just didn't make sense to tear into it and not go through the hole engine.

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    TJR345's Avatar
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    Quote Originally Posted by Gboyet93 View Post
    you are correct. I forgot that I would need to upgrade the valve springs. Are there anymore plastic parts that can be upgraded with steel parts? I downloaded the technical manual, and plan to start the rebuild next week. I also have a 2001 GX345, but to my understanding it has a steel cam.
    On the 345 the plastic gears were replaced with plastic gears,except the cam gear of course.The reason for me changing them was if the cam failed to obvious heat and stress then the others would have heat to deal with.Being plastic I felt as long as I had the engine apart change them.
    The GX345 has the steel cam,anything with serial number above 106 in the FD590 had the steel cam.
    Tom

    2019 X590 with power mulch control and PF bagger
    30" mechanical tiller
    02 X595 with 62" deck,front thatcher and powerflow PTO kit
    3pt hitch with Heavy Hitch 45 JD loader
    12 JD suitcase weights
    JD/Brinly 3pt plow
    Frontier SS1036 3pt pto spreader
    (2) JS63C walk behind mowers
    TS 105 JD weed wacker
    tow behind 15 gal. sprayer
    Turftime 60" lawn roller
    Turftime 54" 3pt core aerator

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    I greatly appreciate your advice. I have never done anything as in-depth as an engine rebuild, so I have a little anxiety. Hahaha.


    Sent from my iPhone using Tapatalk Pro

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    [QUOTE=Gboyet93;2596154]I greatly appreciate your advice. I have never done anything as in-depth as an engine rebuild, so I have a little anxiety. Hahaha.


    I was were you are as I am a novice mechanic and had never opened up an engine. I Oct this year I did the cam gear on my 285 FD590. I took my time and was successful. I did not know about needing to replace the valve springs and did not but I did replace the other plastic gears.

    I labeled each bolt or bag with blue tape, put them in zip lock bags. Also took pics and printed them so I could number bolts and but back in original location. Have the manual and ask questions of the experts here.
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    TJR345's Avatar
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    [QUOTE=jd2854020;2596762]
    Quote Originally Posted by Gboyet93 View Post
    I greatly appreciate your advice. I have never done anything as in-depth as an engine rebuild, so I have a little anxiety. Hahaha.


    I was were you are as I am a novice mechanic and had never opened up an engine. I Oct this year I did the cam gear on my 285 FD590. I took my time and was successful. I did not know about needing to replace the valve springs and did not but I did replace the other plastic gears.

    I labeled each bolt or bag with blue tape, put them in zip lock bags. Also took pics and printed them so I could number bolts and but back in original location. Have the manual and ask questions of the experts here.
    I knew about the springs from a Kawasaki engine manual that a friend sent me.
    Use your phone to your advantage anytime you can helps a lot.
    Tom

    2019 X590 with power mulch control and PF bagger
    30" mechanical tiller
    02 X595 with 62" deck,front thatcher and powerflow PTO kit
    3pt hitch with Heavy Hitch 45 JD loader
    12 JD suitcase weights
    JD/Brinly 3pt plow
    Frontier SS1036 3pt pto spreader
    (2) JS63C walk behind mowers
    TS 105 JD weed wacker
    tow behind 15 gal. sprayer
    Turftime 60" lawn roller
    Turftime 54" 3pt core aerator

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    Super!! I’m getting more confident due to all the reply’s. A small part of me wanted to send the engine to a machine shop, but deep down I want to do the work myself.


    Sent from my iPhone using Tapatalk Pro
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    [QUOTE=TJR345;2596874]
    Quote Originally Posted by jd2854020 View Post

    I knew about the springs from a Kawasaki engine manual that a friend sent me.
    Use your phone to your advantage anytime you can helps a lot.
    You can replace valve springs without removing the cylinder head.
    However you will need a few special tools.
    Something to add compressed air to the cylinder. This holds the valves from falling down.
    Then a spring compressor to remove the locks.
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    We can walk you through this is you have some good mechanical skills. It's not really all that hard to work on these machines. Heck, if I can do it.....

    Just remember to post lots of pictures and post the details. These fellas will pick out amazing details that you wouldn't notice. So the more you post, the better off you are.
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