Recent content by darrylh

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    McCormick IH 434 starting problem

    will look to see if @80lbs they work loose. I think some would say fit new bolts when doing a rebuild.
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    McCormick IH 434 starting problem

    BTW, I was very surprised to find head bolts all needed 1-2 turns after just say, 6-8 engine hours after new rebuild. Previously, I torque to 75 pounds, but this time I torqued to 80 pounds (user manual states 75-80). At this point I set tappets to 20 thou. I will check head bolts again in a...
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    McCormick IH 434 starting problem

    Correct, cyl 1 is closest to fan/front pulley
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    McCormick IH 434 starting problem

    Hi again, need to get a workshop manual I think. Seem to be 2 or 3 ways suggested on the Net re: setting valve clearances, some clearer than others. Hope what I did was right! Did as follows (firing order 1,3,4,2), 20 thou clearance: 1. set flywheel at TDC, and marked crankshaft pulley at 12...
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    McCormick IH 434 starting problem

    Quite right. Good point. In respect of the other points, as far as I can see, traction on the (straight) belt should be good, since the weight of the saw hangs backwards from the links. Bearings appear very smooth without play and the saw blade looks a recent replacement and sharp. I will...
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    McCormick IH 434 starting problem

    We will try the possibility of a twist in the belt. Since the saw itself is attached to the linkage, the arms should be safe. We will have to get strictly organised, as the ball-hitch and sliding quadrant (which we use a lot) will have to be removed each time the pulley is required (and put back...
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    McCormick IH 434 starting problem

    Thanks for hand brake adjustment. Maybe at some point we will attempt the pivot pin replacement.
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    McCormick IH 434 starting problem

    Thanks for info. I knew this had to be done but not when ...so thanks. We will definitely do
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    McCormick IH 434 starting problem

    Brakes are good. Tractor will be used on private land and not the road. Hand brake is not brilliant but is always parked on level ground. Pivot pin on front axle is a little sloppy and reflects in the steering, but my neighbour has far worse on all of his tractors. I gather this replacement is...
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    McCormick IH 434 starting problem

    Just some more on the pump. I spoke to my son, as my recollection is not as good as his. I think where we went wrong: The literature and images we researched of the CAV pump seemed to show a cross-dowell on the spindle, and a slot in the back of the wheel. Taking what we have apart, I saw that...
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    McCormick IH 434 starting problem

    Just for the record, for those that find this thread after, I want to document a solution. I thought it couldn't be the plugs, but checked anyway, all good. Thought the key switch was OK too but did the test and got current in pre-heat and start positions. Moved onto the CAV pump letters next...
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    McCormick IH 434 starting problem

    will be checking 20 thou on tappets. Pistons and rings. Liners were good. Went 12 bar first, then 20 bar almost instantaneously (pop,pop).
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    McCormick IH 434 starting problem

    Excuse my ignorance. Assume nothing. My tractor ownership in months can be counted on 1 hand, but I am grateful for your expert knowledge. OK, I need to check clearances at 20 thou, which I will do. Heater resistor has been binned/bypassed. In terms of the key switch, tractor came to me with...
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    McCormick IH 434 starting problem

    BTW, I have not touched tappet clearances. They are set exactly as before. Is this crucial to set after a rebuild??
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    McCormick IH 434 starting problem

    I put a gauge on plug 1 hole and got compression of 12 bar (did not do any others though). I have been doubting the plugs but put a meter on plug 4 and get 12.7v. I have direct wire from term 5 on keyswitch to plug 4, then 4mm2 tails creating my busbar. Plug 1 is not ground to earth on block...
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