Welcome to my channel. I am a red seal licensed Heavy Equipment Technician (421A Ontario) since 1989, and I recently got my EGSA Journeyman Technician certificate. I am an educator. I am not servicing equipment professionally and I do not compete with my colleagues or graduates, therefore this channel is about general education and gives a sampling of the kind of lessons one can expect in a trade related college program. This channel isn't for me helping you fix a specific machine for free. Please hire a pro.
Please explain difference between DR controller and DFR1 controller , basic difference is DFR1 control both pressure and flow . If we use closed loop DCV then how both type of controller will make any difference? What benifit we have to choosing DFR1 over DR? As both has almost same internal circuits.
So is it safe to say that Load Checks could not possibly be a factor for Tilt Cylinder Drift when the spool in the HOLD position as the Bridge ports for the load checks are blocked by lands on the spools. (assuming intact iron no cracks in valve body). Also, you went over port relief valves and some newer machines have Pilot Operated Directional Control Valve/ BICS Lock Valves on the lift and tilt circuits with a built in relief to Drain. I've removed mine and checked the orings and back up seals to find they are in tact, but im starting to suspect failure inside the valve itself. They are quite expensive and to just throw the part at my machine is not ideal. Is it possible to Bench test the functionality of these types of valves?
Excellent videos! I have a 763 that is having an odd problem and nobody including bobcat can figure it out. They finally told me i need a whole new control valve assembly for 4k but none are available. Looking for a used one. With the machine running, if i lift the arms up and leave them for a minute, when i go to lower them, its hard to push the pedal and you hear it loading up like hydraulic pressure is building. Once it overcomes the arms drop roughly. This is exacerbated when there is a load on the arms. I have to lift the load up a few inches and then quickly start lowering it. I have to do that a few times to get the load down slowly. If its just a bucket of dirt i can push the pedal hard and overcome whatever hydraulic pressure Is building and it operates somewhat normally. Maybe this issue will interest you, I would really like to figure out whats causing it even if i find a replacement control valve. See video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4ZbmoBbaIg4.htmlsi=Px747QtOLbCEDv3Z
I would like to know more about this particular pump bcoz I can assemble it but don't how it works and it's always passing the test results please pin me
I just picked up a 480C and waiting for the books to get to me. I need to know how to properly check the hydraulic fluid on the machine. Previous owner said, WHILE RUNNING, IN 4TH GEAR. And nothing more. I read somewhere it has to be in transport position. Nothing totally clear proper check. Could you help? According to the serial, it's a 1979 Case 480C Thanks
Can you do a video on how a breaker work on a hydraulic system. We have some machines that have 2 different setups for running a breaker vs using a thumb.
@@hydraulics Awesome! I will definitely watch that series and share it with my fellow mechanics. If you have any more recommendations on hydraulic literature besides that mobile hydraulics manual I would love to hear about it. I'm trying to get a solid fundamental knowledge base on these systems.
Your videos are the best, do you know of any online courses available in Canada that a Red Seal mechanic could take to help fill in any gaps in knowledge when it comes to hydraulic systems used on equipment? I'm a perfect case study of the Dunning Kruger effect where when I was an apprentice I thought I knew it all but now 15 years later the more I learn the more I realize how little I know. Keep up the good work.
Carl Dyke industrial training has some online courses. I haven't tried them. And thanks! I'll be uploading a bunch in the next month or two here. I know the feeling... lifelong learning. Lol
Can you look into the Chinese mini excavators' hydraulic components, they are becoming more and more popular and their components "LOOK" similar, but are not because they are so small, they don't have the 'safety' devices built in because there is no room for them, so knowing more about them might make for good video! Thanks for this video.
