i have had loader valve out, cleaned and replaced resolver seals but still no joy on the front bucket hydraulics. It will work if you use a backhoe function with it. Would a bad resolver on a backhoe section affect loader valve?
Did you remove and check BOTH resolvers from each valve section.? How about a Serial Number.?
Yes, 3 small ones in the back and 2 long ones next to spool caps. I didn’t get a S/N. Any other ideas? Thanks for the reply!
Short answer is yes. Work the non-functioning loader service then at the same time, work each backhoe service in turn. The first backhoe service that makes the loader come good is the one with the faulty resolver. The trick is to know what sequence to work the backhoe, and for that we need the serial number.
This is a "typical" chart for that backhoe.
Thanks for the reply! What is the HMU? Is that something to do with steering function? I’ve never lost steering but did notice if I turned it to the lock and held it then the loader worked.
Still need the Serial Number. The reason why is contained in Cmark's post #4 above, because the diagram posted by HMC is only a generic diagram that may or may not apply to your machine.
CAT has a large staff in Peoria dedicated to making sure there are few if any overlaps of nomenclature. In a nutshell they strive to insure that the label used for any particular part or assembly is different in the service literature than it is in any parts publication or software. At least at the time I worked at the CAT dealer you could not find any reference whatsoever to a "Hand metering unit" anywhere in the parts books. First field service guy that requested one from me refused to believe me that I had no idea what the hell he was looking for. It's a pump.
[Pedantic hat on] Its full correct title is "Pump Gp - Metering". Cat never referred to it an an Orbitrol unit apart from on some early compaction equipment which was a product line they purchased from Albaret some time back in the 1980s IIRC, so the nomenclature from the previous ownership was probably kept. [pedantic hat off]
Lol. Up until maybe 10 years ago, if you wanted to buy a dipstick from Cat you were SOL. You had instead to buy a Gauge-oil level.
I work for a major auto manufacturer. We must have the same team of "experts" making sure service and parts have completely different names for everything. otherwise the parts guys and service techs might get along.....
Don’t even get us started on those parts guys!
And back then you also had to remember to use the US spelling of "gauge" (gage) or you wouldn't find it. Now in 2021 it appears that Cat have finally realized that the US didn't invent the English language and have corrected the spelling........
and just try asking for a thermostat........
Regulator?
I've worked both sides of the counter, several times. One of the most rewarding moments at the CAT dealer was when they finally forced the field service hands to order their own parts, the in house techs had been doing it for about a year. One of the most vocal critics of the parts staff came to me quietly one evening, papers in hand, and asked me politely: "How the Feck do you ever find the right part in this Sh*t!?" We came to an understanding him and I. Bonding moment, LMAO!
Ok guys my S/N is 4zn21109
Just bought a Oil Pan Insulator or maybe Isolator(Pan Gasket) at Cat.
Here's the resolver network. You need to be using the first illustration on the attachment but the explanation of how the system works is common to both. Now you have the correct resolver network diagram for your S/N you can follow these instructions.
Mine bucket tilt will work if I use any of the rear functions does mean it’s left stabilizing
Till you figure it out you feel like a dipstick. Or a thermostat. Cat sure has some odd wordings my favorite is what they call a chalking gun.....