JD400 industrial diesel valve setting

300winchester · Aug 7, 2018

Manual says to bring #1 to TDC adjust #1 and #3 exhaust and #1 and #2 intake, then rotate 360 and set #2 and #4 exhaust and #3 and #4 intake
my question is
It says to bring #1 to compression stroke how do I know which is compression stroke , when both rods are equal
pistons #1 and #4 travel up and down together and #2 and #3 together.

I just want to make sure I get this right.

when you rotate 360 pistons #1 and #4 are tdc again but cam i am guessing in different position for valves ?

thanks in advance

matthies · Aug 7, 2018

The compression stroke on #1 is when the valves on #4 follow each other(exhaust is closing and intake starts opening). There's either a pointer and mark on the front pulley, removeable cover on the injection pump to align lines, or a hole in the flywheel that allows a 5/16 bolt to lock into when rotated(also an odd looking bolt that holds a diamond shape cover on the rear engine cover, long stem of bolt may fall into the hole when rotated). The hole in the flywheel is what is mentioned in my 410 book. Also when the valves are rocking over on #4 the valves will be loose on #1 and loose on #4 when #1 valves are rocking over together.

300winchester · Aug 9, 2018

Got tractor running, thanks
The hydraulic brakes do not work, any idea ? also is there any way to add, attach a spool etc off the loader hydraulic to operate a 3 point attachment ?
appreciate you help

matthies · Aug 9, 2018

Cleaning the brake valve internally has fixed a lot of them remove the top plugs and two plugs on the bottom side and flush out. Don't have to remove the valve, just do this on the tractor. The valve sits low in the system and all the junk settles there. You could tee into the pressure and return ports for another spool valve or uncouple bucket hoses from spool and run hoses to the attachment.

300winchester · Aug 9, 2018

I got the cap off and filled resivoir twice, pumped both pedal, refilled twice , fluid going somewhere ??
where should I go from here ?
thanks

300winchester · Aug 10, 2018

I attempted to take off brake housing but found bolts to be way too long to get out, now I have to replace gasket so I need to take off, more work, will

i have to lower loader frame from back axle ?> dang the luck

MGM

matthies · Aug 10, 2018

That's why I said to leave the valve on the tractor, but since your fluid is disappearing with nothing getting to the ground, your brakes are probably bad and the pistons are past the seals then the axle housings need to come off, so best remove the whole loader to ease the rest of the work. The other post mentioned the bleeders, if they can be freed up and no oil is coming from them, put air pressure into the bleeder and see if any air is coming into the brake valve and also remove the trans fill cap and see if you can see or hear air escaping into the rearend.

JD400 industrial diesel valve setting

300winchester

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matthies

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300winchester

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matthies

Well-known Member

300winchester

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300winchester

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matthies

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