X495 Overheats and leaks from coolant reservoir
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    X495 Overheats and leaks from coolant reservoir

    My grandma has a X495 diesel mower. It overheats and when you shut it off coolant leak from the reservoir cap. I have already replaced the thermostat. Moving to the water pump next. Just wanted to see if anyone else has ideas.

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    TJR345's Avatar
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    Is the radiator screen clean.I get grass between the rad and the hydro cooler.I would also try the rad cap before doing the water pump.
    I have the 62" deck and would get a lot of blowout out the front of the deck and then sucked into the radiator area.The screen would get some but a lot was in between the rad and the hydro cooler.That for sure will make it run hot and overheat.Those engines need the airflow.
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    Tom

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    TruckFarmer55's Avatar
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    It was clean when I saw it, whether or not the person running it is checking I don't know.

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    Quote Originally Posted by TruckFarmer55 View Post
    It was clean when I saw it, whether or not the person running it is checking I don't know.


    This is the first thing I would find out.

    Almost sounds like it has 2 problems.

    Overheating, especially after you turn the engine off. This is somewhat common because you are stopping the flow of coolant and oil. When restarting the engine it should cool back down fairly quick.

    Also a coolant leak from the radiator neck, cap, surge tank or the hose that connects the 2. Radiator caps are cheap and frequently go bad. If it's more than a few years old replace it. If the cap is the original one that came with the tractor. Definitely replace it! You can get a special tool to check if the cap is bad. You attach the cap and pump it up like a basketball. It should hold the amount of pressure written on the cap. A local parts store may have one they will let you use.

    Next common problem is the overflow hose. It needs to be in good condition and clamped at both ends.
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    Do a flush/boil out on the radiator, you got to have flow for it to cool. If you can, put a light on one side of the radiator and look thru the fins on the other side. Radiator might look clean on outside but be plugged up with seeds, chaff, grass, etc. inbetween the fins. Seeing just some light is not good enough, make sure it is totally clean.

    I am just adding to the other very good troubleshooting/suggestions.

    Just hope the the motor was not overheated long enough for not damage to occur! Good Luck!
    Last edited by raco232; 08-08-2017 at 05:51 PM.
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    The x495 operator's manual shows which fluid to use, how to check the coolant level and clean the radiator fins and screens...you likely have done all this already.

    x495 -- Service Engine.pdf


    Chuck
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    Not alot of mechanical failures and overheating I have seen on these. Most are caused by plugged screens and rads. Seen a few clogged up radiators inside where straight water was used. I haven't seen many blown head gaskets but its worth a look see. Remove cap and crank it up.. If it starts spewing out..might have an issue. Also.. And someone correct me if wrong.. The blades/pto should cut off when overheating to reduce load on engine.

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    Correct the blades do shut down. We don't run anything but John Deere oils and fluids. Even in my 7.3. Deere is rated higher anyway. I'll start replacing caps and checking lines. Other people like to use and abuse her stuff but I'd rather see it looked after before the fix gets real expensive.
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    I'd recommend checking the engine temperature with a temp gun vs using the dashboard gauge. They are way more accurate. Plus you can use it to check for a internally clogged radiator. If you find a cold spot fluid is not moving inside it.
    2014 X540 with HDAP tires, 54" deck, brush guard, arm rests and cargo bag.
    JD 48" plow with angle from seat kit & heavy duty skid shoes.
    4 suitcase weights and chains.
    JD tow behind spreader.
    JD 42" lawn sweeper.
    JD 10P cart.
    JD JS61 RWD walk behind mower.
    Stihl KM110 power head with pole saw, shaft extension, power scythe, curved shaft edger, 2 straight shaft cutters (string & blade).
    Stihl MS180-CBE 16" saw.
    Stihl SH86C hand held blower vac.

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    TruckFarmer55's Avatar
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    Good idea. I'll do that.

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