Cotter pins in rod nuta d4400, whats the trick???

Not sure but soundalike a place for stainless aircraft safety wire.

There is no shame in backing the nut off slightly to align the selected hole with the castellated nut. You do not want to back off from the measured torque to get to the nearest available hole but instead go tighter to reach it. However when you reach the hole, by all means adjust the position of the nut as needed to get the key in.

Note there are usually?/sometimes 2 holes drilled in the end of the bolt at 90 degrees to each other, so you do not have to advance the nut as far as if there is only a single hole.

After 3 more hours my big hands just don't reach in far enough to get it done. I removed the back nuts on the rods, machined .200 from the castle end and put the nuts back on. I then machined 4 grade 8 nuts down to .200 wide and used them like a pell or jam nut with a little blue thread locker. Did nt want to change the cat engineering but just could not get the cotter pins in....WA7OPY

How did you get them out in the beginning?

Jordan

Hi Team,
somewhere I have an article from Cat about these pesky pins.---see scan below.

Back in the forties they experimented with leaving out the pins as it is the stretch of the bolt shank that keeps tension on the nut etc. that keeps the nut from undoing.
Complaints were received from Dealers about the missing pins so they started to refit them until such time as new models of engines were designed and no provision for the pins was used.
From the Service Manual, and as I was taught, it is permissible to advance or slightly undo a correctly torqued nut to align the pin holes, as CCJ said advancing is preferable.

Now we Torque Turn the fasteners and they seem not to come loose if done correctly.
As a by the way, in some applications the actual bolt stretch (length increase) is measured as a guide to correct tension being applied.
Cheers,
Eddie B.

How did you get them out in the beginning?

Jordan

[QUOTE=jstandle;203486]How did you get them out in the beginning?

Jordan[/Q

It was not to hard to remove them, ground a point on a long screw driver to fit the eye and used one more to bend the flag straight. Used a harbor freight blue light( the ones that are free gifts)to light the hole. I then bent a 13/16-7/8 offset box end and turned the nuts on click at a time. Just could not push the cotterpin back in the back bolt....WA7OPY

[QUOTE=jstandle;203486]How did you get them out in the beginning?

Jordan[/Q

It was not to hard to remove them, ground a point on a long screw driver to fit the eye and used one more to bend the flag straight. Used a harbor freight blue light( the ones that are free gifts)to light the hole. I then bent a 13/16-7/8 offset box end and turned the nuts on click at a time. Just could not push the cotterpin back in the back bolt....WA7OPY