Hi Everyone,
New to the forum but have read numerous posts over the last couple months and have been impressed with the advice and humor in most.
I had a good scare the other day. I had been running a 1980 Cat 235 excavator on my site which is extremely steep and rocky. I had just returned to one of my intermittent landings and was move some loose material when all of a sudden the cab side window blew out and the casing of the boom lift cylinder was protruding into the cab window and the cab was creaking. The lift cylinder was caught in the window opening and the chrome rod of the piston was leaning on the cab.
After a couple deep breaths while staring at the unwanted visitor in my cab, I exited and walked around the cab on the catwalk only to discover that one of the 2 pivot points where the base of the boom is pinned to the frame beside and below the cab had broken loose which resulted in the cab leaning on the cab which sent the piston cylinder into the cab. I now had to move the machine back to our main lower level landing with no boom and with the came creaking the whole way as the rest of the side broke and filled the cab. At one point there was so much pressure on the cab that the front windows actually were bowing in and cracking.
After finally getting out of the machine and thankful to be alive it appears that the pin, both ears and the sleeve were intact but what gave way was the steel eyelet or bushing or hinge barrel on the boom itself that the pin slides through broken and bent which allowed the boom to come off the pin.
I took the backhoe and was able to push the boom back onto the pin and wedge some logs beside the piston and base of the cab to get the pressure off the top of the cab.
Has anyone had this happen and my thought or question is that since I have the boom back in place off the cab, if I use some steel wedges and the power of the lift pistons I think I could probably bend the break backed to a closer closed position. Assuming if that went successfully could I have a U-shaped saddle made that would reinforce the bent portion and that could be welded to the underside and top of boom. There is plenty of clearance around the pin so as not to cause any binding issues. If the consensus is that this may work I would do both sides. If this is plausible then I would then be left with straighten the cab to accept a new window and attempting to regain a level of trust in the old girl. Any thought or ideas are welcome.
Many Thanks
New to the forum but have read numerous posts over the last couple months and have been impressed with the advice and humor in most.
I had a good scare the other day. I had been running a 1980 Cat 235 excavator on my site which is extremely steep and rocky. I had just returned to one of my intermittent landings and was move some loose material when all of a sudden the cab side window blew out and the casing of the boom lift cylinder was protruding into the cab window and the cab was creaking. The lift cylinder was caught in the window opening and the chrome rod of the piston was leaning on the cab.
After a couple deep breaths while staring at the unwanted visitor in my cab, I exited and walked around the cab on the catwalk only to discover that one of the 2 pivot points where the base of the boom is pinned to the frame beside and below the cab had broken loose which resulted in the cab leaning on the cab which sent the piston cylinder into the cab. I now had to move the machine back to our main lower level landing with no boom and with the came creaking the whole way as the rest of the side broke and filled the cab. At one point there was so much pressure on the cab that the front windows actually were bowing in and cracking.
After finally getting out of the machine and thankful to be alive it appears that the pin, both ears and the sleeve were intact but what gave way was the steel eyelet or bushing or hinge barrel on the boom itself that the pin slides through broken and bent which allowed the boom to come off the pin.
I took the backhoe and was able to push the boom back onto the pin and wedge some logs beside the piston and base of the cab to get the pressure off the top of the cab.
Has anyone had this happen and my thought or question is that since I have the boom back in place off the cab, if I use some steel wedges and the power of the lift pistons I think I could probably bend the break backed to a closer closed position. Assuming if that went successfully could I have a U-shaped saddle made that would reinforce the bent portion and that could be welded to the underside and top of boom. There is plenty of clearance around the pin so as not to cause any binding issues. If the consensus is that this may work I would do both sides. If this is plausible then I would then be left with straighten the cab to accept a new window and attempting to regain a level of trust in the old girl. Any thought or ideas are welcome.
Many Thanks
Close call and Help /Suggestions on CAT 235 Boom repair
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