• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Search results

  1. P

    Cat 336el hydraulic problems

    Yep, that's most likely from the broken check valve. Here's a pic I had saved.
  2. P

    Cat 336el hydraulic problems

    Take a look at the check valves I highlighted in post#10, most likely the upper has failed but change both while your in there.
  3. P

    CAT 313 Next gen Tilt bucket sensor?

    If you use leica it's their tiltsensor and then the auto functions go from leica to the machine as commands, the machine doesn't need a sensor connected to it directly. But if you use Cat grade 2D or 3D it's a GS520 sensor you need.
  4. P

    Cat 336el hydraulic problems

    Check valves in the bottom is for letting flow from each pump go to the main relief but not cross over to the other pump and vice versa What's your serial and symptoms?
  5. P

    Cat 299D3 XE not sure whats going on

    Fuel issue causing engine to loose power? Do you have ET or something like that to connect and check values and codes?
  6. P

    3054 engine 914g/IT14G Cat

    Yep, that's a "low" speed machine also. Do you know if max engine speed was checked also? Qften that's overlooked but it makes a world of difference if the engine is missing a couple 100 rpms on top and the throttle cable tends to stretch over time. Spec is 2350rpm.
  7. P

    Help! Cat 246D LH Joystick

    To me it sounds like the travel alarm?
  8. P

    3054 engine 914g/IT14G Cat

    What's your serial? Basically a high speed machine has 2 motors and a low speed 1 motor. Dave's machine was a 1 motor setup ex factory and thus a low speed machine with creeper speed.
  9. P

    CAT 3126B issue on startup.

    Most 3126B engines have a checkvalve/fuel pressure regulator on the return port on the back of the head, very common for the oring seal on the plunger in that to go bad and that will manifest itself as extended cranking or stumbling for the first moments of running so check that first.
  10. P

    Caterpillar TH330B error code, who can help me?

    you need cat electronic technician software to recalibrate.
  11. P

    Cat 312C Spool Stuck In Control Valve

    I'm guessing that's a piece of the snubber ring on the piston, you'll for sure find more damage inside cylinder. Give the spool a once over with some fine grit paper or lapping stone and you'll bre fine.
  12. P

    Cat 312C Spool Stuck In Control Valve

    Most likely a piece of metal is jammed in there somewhere and my first guess would be that it came from the stick cylinder so start by removing the lines going to the cylinder and try looking into the openings. also remove the line reliefs and do the same thing. The side cover can also give some...
  13. P

    CAT 301.8 stick comes slowly in on its own

    With the stick drift rate he showed in the movie I'm fairly certain that the leakage rate around the spools are of no relevance.
  14. P

    CAT 301.8 stick comes slowly in on its own

    Here's my take, If you clearly hear a whoosing sound from the cylinder and not the main valve inside the machine then it's the cylinder seals even if it isn't drifting outwards. This is due to the fact that for the stick to drift out the stick cylinder rod has to go in and that would mean oil...
  15. P

    CAT 301.8 stick comes slowly in on its own

    Internal leakage in the cylinder is the first thing to check. Stick out as much as possible with a full bucket in the air and shut the machine off and listen for oil bypassing the seals in the cylinder.
  16. P

    303.5 switch above wiper, any ideas?

    Correct, saves you from getting slapped in the face by the wiper. For printing or posting small sections like this I use Windows own snipping tool, for complete schematica I just do it directly from Cat SIS.
  17. P

    Vacuum Pump for Hydraulics

    12V electric is the way to go, no need to have the service truck close to the machine or messing with inverters. Just a small pump with cig lighter adapter or alligator clips to hook on to the machines batteries.
  18. P

    303.5 switch above wiper, any ideas?

  19. P

    Cat C7 No Go--Flat won't run--Help troubleshooting please

    Ok, Do you have answer to any of the other questions asked earlier in the thread also?
  20. P

    Cat C7 No Go--Flat won't run--Help troubleshooting please

    Yeah, can't be right.
Top