Posted by P and R Pete on March 02, 2008 at 18:05:57 from (207.7.182.176):
Couple of pics to help those yet to travel by this way..
Here's the rockshaft. The outer rockarms are removed. It's a tapered keyed shaft. The left (L on the tractor) pillow block is split, the right is not. You can see the arms which constrain the connecting rods..
The connecting rods, still attached to the pistons, and the pins which went through the arms and connecting rods. They were a bear to drive out.
The nubs on the ends of the pins were held by the control valve operating lever bracket, which can be separated enough by the removal of two bolts in the bracket, whose holes can be seen to the left, to allow it to be popped off the pin nubs. Turns out the boots are cylindrical (!) and are folded around the connecting rod, and held wrapped by a piece of wire twisted. The head of the connecting rod thus fits THROUGH the boot, and can be pushed through, and the piston/rod assembly removed from the rear of the block.
The bottom ends of the control valve operating lever brackets are pinned to the ends of the control valves. The boots are held in similar fashion. However, the control valve cannot be extracted until the lever 'stops' are moved, one of which can be seen on the far left of the picture. Two bolts hold it in. It can be swung up if the front bolt is removed and the rear loosened. Afterwards, the control valve, (a long sucker) can be slid out of the block.
Here are the control valves, (still attached to their brackets), which are NOT shown on the exploded view in the 'serviceman's touch control handbook'.
Here's a pic of the bottom, at where all the magic happens. Lots of allen-headed plugs to remove, and two nuts that I expect are hiding 'thermal relief valve screens'.
Maybe Sam and Greg are here already, and can me what' hidden here.
I'm very curious to hear what Greg's "rattle" turns out to be, besides the whereabouts of his safety valve piston.
I'm thinking I might take the stripped block to my machinist for his cleaning-treatment wizardry. He took my crudded carbon-encrusted head and made it look brand-new. Everywhere I read, everything has to be clean-clean-clean when reassembled.
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