Cat 302.5 stops working when using

[jason champaign]

we have a cat 302.5 excavator its a 99 or 2000 with 3684 hours on it. it starts up no problems and i can dig along with it and it just stops wait some and it starts working again. i have changed out the safety switch, and the hydraulic filter and fluids. Any ideas on ideas on what the problem might be?

 

[thepumpguysc]

Does it chug to a stop.. or does it shut off like u turned off the key.??
If it’s a chug, chug, stop.. it’s probably fuel related..
If it’s an immediate shut off, it’s probably a safety switch or electrical..

 

[jason champaign]

The hydraulics quit working the machine stays running

 

[muddog1975]

Could be arm bar switch going bad, possibly wiring to it, rubbed or broken. Relay for that circuit going out. Good luck. Let us know what you find

 

[Dakota_56]

My did the same,but after tearing servos and changing them around,discovered a bad control power fuse holder socket was bend-only and occasionally making monetary contact.took 2 days for the tech to find it and only by accidentally when I rested my finger on the fuse he heard the safety relay pull in.