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I have a 1993 Hitachi EX-120. After replacing some hoses, the hydraulic oil level looked low, so I added about 10 gallons. Now the oil is above the top of the sight glass. What could cause this?

Looking for the correct NH220 injector plunger travel (mm) and valve settings for a Komatsu D80-12A. If anyone has these specs or the shop manual, please share. Thanks!

Someone cut the wiring harness when the machine was stolen. I replaced the connectors and repaired the wires, but the machine still won't move. The engine starts, and the lights, horn, and A/C all work. Has anyone had this problem before? What should I check next?

I have a 2016 New Holland L218 skid steer that isn't charging the battery. I've already installed a new alternator, but it's still not charging. I'm still learning this machine and was wondering if there's an alternator fuse, relay, or fusible link that could be causing the problem. Any...

I'm working on a 1970s Case 570A and recently rebuilt the brake control valve with new internal parts and check valves. After reinstalling it and testing the machine, the gasket between the two valve body halves blew out. I'm trying to figure out if it's caused by excessive pressure, an...

I came across a JD Deere 870G that doesn't appear to have the hydraulic counterweight removal system. I always thought those bigger 870G machines came standard with it, so now I'm curious if some were built without that option from the factory. Has anyone else seen this before?

I'm trying to track down an issue with the blade hydraulics. The blade will go down, but it doesn't seem to have enough pressure to actually lift the machine once it hits ground resistance. There's no strange noise, no visible leaks, and the hydraulics seem smooth otherwise. Has anybody run into...

I'm troubleshooting a strange issue with the driver display unit on my Liebherr machine and I'm trying to avoid replacing the display before knowing for sure it's bad. Right now the problem seems to happen whenever I connect X724 pin 7. As soon as it's connected, the display starts acting up...

I'm having a fuel priming problem on my Caterpillar 304C CR. The machine has been bogging down under load for a while, so I thought it might be a fuel delivery issue. After checking the fuel filter and hand priming it, it won't start at all. I removed the filter and noticed that no fuel comes...

Saw one sitting in the Ritchie Bros auction yard, and it caught my attention. From the photos, it looks pretty clean, but I do not know much about the CFG equipment in the long term. I'm mainly curious about reliability, parts availability, fuel efficiency, and how it performs under daily...

Mine is leaking grease whenever we tighten the tracks. Is there a way to repair it without cutting the spring and replacing the whole unit?