First time posting here, long time reader: I recently took on the task of helping a farmer with his 1976 Cat 245 excavator. A little history (and I don't have much), *claims one main pump was replaced/rebuilt. said previous mechanic cleaned system, and changed filters... *machine would stall out when traveling. *other mechanic told farmer swivel was likely the culprit. *I get called to drop and repack swivel. I find seals/o rings are definitely wore, and damaged, no metal or particulate. corroborating previous diagnosis from other mechanic. I reinstall, test machine, all seems good. *I get a call from Farmer saying machine won't move again. then farmer says it is doing what it did before, travel function tries to kill machine. then farmer tells me after a day, machine will move for a little bit, and stop again... I told him NO! don't do that, leave it alone until I get some answers. he agrees. I'm not familiar with this old beast of a machine, and I haven't been able to find info related to hydraulic circuits yet, and I guess I am reaching out to see if anybody on this forum has any insite they could lend to me to try to get this sorted out for the old boy. *Machine has single forward and reverse pedals. I have not put gauges anywhere yet because I have not been back to machine. Thank you in advance for any insight.
Sounds like static brake is comming on..
First check would be pilot pressure. The pilot pressure releases the brakes and is also used to control pump output. You could also check the pilot filter for metal cuttings. I think you have to tee in under cab to check pilot pressure. Number 12 jic tee . Need serial number for spec. I think it’s around 300 to 350 psi.
All other functions operate properly. Just travel motors apparently are the issue. I am not too familiar with this old beast, i was "told" there is a way to switch from one pedal forward and reverse to independent track travel with a lever??? Any truth to this? I have not been back to machine yet, so im trying to get a better understanding of system beforehand
Im not familiar with this
There is a brake in each track motor...
Functions will stll work with low pilot pressure. Brakes need good pressure to release . Ive never seen single lever control for travel on these machines . You still need to verify pilot pressure first.
I will verify pilot pressure first thing when i get to machine Serial number is 95V00259
Well guys, found a kinked steel line under speed and direction valve that feeds track brake valve. Problem solved.
Good to hear .