Hi all. I purchased a used 1992 New Holland L455 with 2500 hours on it two months ago. I've only put on about 3 hours since I bought it. Last weekend I was moving some dirt and all of the hydros stopped dead in the water. No boom, bucket or drive controls. Also, the hyd charge light came on solid red and the buzzer continuously goes off. I will admit this was at a low RPM (with no load) which I have learned you should not run these machines at too low of RPM. The Kubota Diesel engine starts up and runs fine. However, none of the controls work and the motors don't make any sounds like they are trying to operate. Boom is down. I cleaned out the cylindrical filter screen under the seat which was dirty. Also checked fluid levels and they were fine (slightly overfilled actually). Fluid was changed by prior owner 100 hours ago with new screw in filters as well. I also removed the pressure sensor on the filter housing to inspect and clean the connections. It was also recently replaced. I called the local dealer and they said that the flex plate has probably gone bad. It's $700 and in the middle of the machine. I ordered the service manual and am preparing for the worst. I wanted to post here before I dig into the machine to see if anyone has any other ideas I could try first. I've read as many threads I could find on here but there hasn't been much posted on the flex plate install on these older machines. I'm hoping that I can document this to help others in the future. I have wrenched on stuff before but am new to hydraulic systems. Any help is much appreciated! My plan as of writing this: 1. Power wash pump compartment under seat to have clean area to work 2. Slowly drag dead machine 20ft into garage for better work space (on wet ground as to prevent damage to drive pumps) *the parking brake bracket is stripped on one side so I cannot engage that 3. Test the hydraulic pump and pressure. I still need to identify which pump this is when I get the manual. The tech I called said to remove a set screw and start the machine to see if oil spews out. If it doesn't you can narrow it down to bad flex plate. 4: Remove peep window on flex plate bell housing for visual inspection (#9 on Messicks diagram) Some pictures here NH Pics
NH New Holland L455 changing out the flex plate
- Thread starter berda
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