Speaking of grapples...????? Pins...

[Fuddy1952]

It is Titan. I used it hours today and it worked OK. I'll just remove pins, oil & use cotter pins.

 

[Midniteoyl]

It is Titan. I used it hours today and it worked OK. I'll just remove pins, oil & use cotter pins.View attachment 736482View attachment 736483

Looks like they upgraded since then.. Probably because of the types of problems you are experiencing.

 

[kenmac]

I had a green machine thumb bucket grapple once that had the pins like that on the closing lid.
Didn't have any grease fittings, and Never had an issue with pins coming out

 

[LD1]

If you have the room....drill the pin holes out to 1/4" and use a bolt and a nyloc

 

[Fuddy1952]

I'm betting cotter pins I won't have anymore problems. I never liked hitch pins anyway except A few things I remove often and can't snag anything.
I have a box of Zerks and taps. I may drill & tap install a grease fitting which is easy. I use carb cleaner & rag washing burrs out first.