Hello Fine people, New tread on the subject as the initial was diverting too much Problem: Machine has low force on hydraulics either on ripper, (it does not Lift the Rear of the ground) still lifts nose up but eforthly, its a PAT system so tilt and angle work but one can see its week. After 2 or 3 hours working ploblem gets worst, sometimes engaging the soil it has no force to lift a hidden stone. 2 or 3 questions to old timers 1- if u had a dozer from unknown provenience, what would u guys suspect right away, i mean based on your experience, would it point to the main pump? 2- if your answear is "test pressures" could u help me with the procedure, as i got litle to no experience in this CAT systems. 3- would u think any mickey mouse o filters, strainers and hoses could be helping the problem. Thanks in advance.
To quote University Challenge. Here's your starter for 10...........
buh ... that we´ll keep me busy for some time... maybe i´ll get an A after thanks
Hy Gents, Is there any procedure to test Pump Case Leak? Like wich flow is acceptable/ min or max?
Gents, Any help in this matter, we would like to trace the problem to either the pump or valve bank.... we need the machine working but inbetween we would like to be able to figuer out where the problem or problems are comming from. thanks
Thanks Nige for all this information .... Meanwile i had time to understand this Hydraulic system, and i have a pretty good idea of what´s going on there!!! Nevertheless, i would like some opinion from some of u, that had the chance to be dealing with this problems before.... It is obvious that my problem is on the resolvers, or it is the resolvers and worn pump. Despite CAT manuals do not mention it, what damage can i get from tricking the pump into max pressure compensation all time, using the pressure compensator valve, instead of using load sense signal proportional valve, whereas the proportional valve would be fed with pump press instead of load sense signal. Reason is i do not have time to fix the valve bank any time soon, either i´ll do the job with it in this conditions or i trick it into the condition above and finish the job. Thanks
Hello fine people, any HYD system experts here? Just hooked a gauge today at the thing, blade lift operating on stby press 30ish bar, other blade functions go 100bar , only the riper valve to UP position triguers max operating press 208 BAR , wich is weird in my mind.... both functions should use same signal press to pump. At least found out the pump is fine!!!