Seeking help re: Oil leak
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    Seeking help re: Oil leak

    My 425 AWS with Kaw 20hp motor has a slight oil leak from a valve cover. I snugged up the bolts but they were not really loose. Does anyone know what type of gasket is used on these valve covers and if John Deere sells them individually?
    1998 JD 425 54" Deck, 46 Snowthrower

    Trucks Are Red, TRACTORS are Green!

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    DRobinson's Avatar
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    JDGeek:
    I'm sure that the 425 uses the same valve cover or at least the same type as the 445. The seal is a square section packing (like an O-ring only square instead of round) that fits in a groove in the valve cover. At 1600 hours, my right one has never leaked. The left cover, on the other hand, seems impossible to seal. I have not replaced the cover yet, but have put in several seals. Your JD dealer or one of the GTT sponsors will have the seal or at least can order from JD.

    Don
    Don

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    RRMCCABE's Avatar
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    Snugging them up has never worked for me. I installed a set on my old 345 a couple years ago and bought them from the dealer.

    Yours are available individual and JD site shows they are going to cost you $7.25 each.
    1967 John Deere 110 (round fender) tiller & Model 80 Cart
    2010 John Deere 2305, 200cx loader and 62" MMM, 54" blower, I-Match

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    Quote Originally Posted by DRobinson View Post
    JDGeek:
    I'm sure that the 425 uses the same valve cover or at least the same type as the 445. The seal is a square section packing (like an O-ring only square instead of round) that fits in a groove in the valve cover. At 1600 hours, my right one has never leaked. The left cover, on the other hand, seems impossible to seal. I have not replaced the cover yet, but have put in several seals. Your JD dealer or one of the GTT sponsors will have the seal or at least can order from JD.

    Don
    Don,

    My 425 has just over 720 hours. If you mean left as you are sitting in the seat that is the same side where mine is leaking. I wonder if it is some manufacturing quirk. It seems like there is just enough oil that leaks every 1 1/2 hours of operation to attract dust. It never show on the dip stick! Thanks for the info on the packing. I'll check with my dealer.
    1998 JD 425 54" Deck, 46 Snowthrower

    Trucks Are Red, TRACTORS are Green!

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    Thanks!

    Thanks to both of you!
    1998 JD 425 54" Deck, 46 Snowthrower

    Trucks Are Red, TRACTORS are Green!

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    DRobinson's Avatar
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    Quote Originally Posted by JDGeek View Post
    Don,

    My 425 has just over 720 hours. If you mean left as you are sitting in the seat that is the same side where mine is leaking. I wonder if it is some manufacturing quirk. It seems like there is just enough oil that leaks every 1 1/2 hours of operation to attract dust. It never show on the dip stick! Thanks for the info on the packing. I'll check with my dealer.
    Yep, left sitting on the seat. Same with mine; just enough to make it messy.
    Don

    2320, 54D MMM, 200CX FEL, 54 Front Blade with Artillian Extensions, Omni Transformer Hitch
    445, 54 mower and 54 front blade
    80 dump cart, 21 walk behind mower

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