• 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!

hydraulic

  1. T

    Bobcat 442 issues

    My boss purchased a 442 at auction. (I have since learned to Google common issues before buying certain models) Anyways we have been getting some of the kinks worked out of it. One issue is we noticed that at times it is slow to swivel but if you bump the right stick while swinging it will...
    • twglue
    • Thread
    • bobcat 442 hydraulic slow hydraulics swing
    • Replies: 1
    • Forum: Excavators
  2. B

    Sloper/articulation

    I’ve got a question/looking for experience in articulation on a Road grader, with a Rome sloper attached. The grader, a John Deere 770D, has articulation cylinders that are leaking/bypassing, causing the machine to articulate left and right, when turning. I found the articulation cylinder lines...
    • BT037
    • Thread
    • articulating grader hydraulic road grader sloper
    • Replies: 14
    • Forum: Motor Graders
  3. S

    Koehring 166 Hydraulic Schematic

    I have a Koehring 166 and I'm having no luck finding a hydraulic schematic for the machine. I've purchased both the operator's manual and the parts book and they don't contain a proper schematic. The closest thing there is are pictures of the components and the hoses. That would be OK if the...
  4. A

    Case 621C Brakes issues.

    I just recently bought a case 621C. Little over 4000 hours. It barely has any brakes. It is hydraulic brakes with discs in the hub. I noticed that they have a hydraulic brake line going to the front axle blocked off and a couple plugs unplugged. the rear axle is filling with hydraulic fluid and...
    • atozmotors
    • Thread
    • 621 621c brake brakes case disc hydraulic repair seal
    • Replies: 5
    • Forum: Wheel Loaders
  5. Y

    Komatsu PC130-6 Boom lift

    Hi Everyone, I have a komatsu pc130-6 excavator and the issue I have is that the boom doesn’t lift when the lever is pulled on just by itself. When the boom lift lever is pulled with another lever function, then both work. Any ideas or suggestions as to what this might be? Any help would be...
    • Yuvin Wickramanayake
    • Thread
    • boom excavator hydraulic hydraulic valve komatsu pc130 lift pc120 pc120-6 solenoid valve bank
    • Replies: 1
    • Forum: Excavators
  6. L

    Kobelco SK35SR2 travel motor hose routing

    Hello all, I had a hose end fail from corrosion on the travel motor of this machine, seemed like a simple job to replace the ~1m hose. How naïve I was :rolleyes: The issue is the 4 x hoses from the travel motor are routed along the frame and then enter an approximately 2" sheath for the...
    • loopman
    • Thread
    • excavator hydraulic kobelco
    • Replies: 1
    • Forum: Excavators
  7. X

    Case Drain – KX41-2V

    I'm looking to rent a hydraulic flail mower for my Kubota KX41-2V and I've run into a bit of a snag with the hydraulic setup. The mower I'm interested in requires a case drain, but I’m having trouble locating where this should be connected on my excavator. Here’s the situation: I’ve been told...
  8. A

    Grapple Bucket Cylinder Issue

    Hi I recently had my hydraulic cylinder for my grapple bucket repacked and now it does not extent with any power. I apologize for any incorrect terminology I am new to heavy equipment. Background I recently bought a 2004 NH LS170 and with it came a single cylinder grapple bucket. Upon receiving...
    • atg215
    • Thread
    • aux hydraulics grapple grapple bucket help hydraulic hydraulic cylinder skid steer
    • Replies: 14
    • Forum: Skid Steers
  9. L

    John deere 225dlc boom wont go down

    John deere 225dlc. Big boom sometimes won't go down. Where do I start
    • ludd
    • Thread
    • electical hydraulic
    • Replies: 2
    • Forum: Excavators
  10. W

    Open-center axial piston pump adjustment

    Hi, newbie, but looking for a little expert advice by someone that knows more about this then me. I have a 3.5 ton mini (jd 35g), I believe the pump is a open-center "constant horsepower" type, as there are only output lines and no feedback input. Presumably this is the diagram for my pump...
    • WesRo
    • Thread
    • hydraulic pump temperature
    • Replies: 8
    • Forum: Excavators
  11. J

    CAT304E CR (TTN) (2013) - Tips for finding a hose on the manifold

    Hi all. I blew the boom cylinder extension hose on my CAT304E CR. I am trying to find the "other end" at the manifold to cap it so I can move the machine up to my shop for a proper repair. The usual "pull the hose and look for wiggle" trick didn't work, probably b/c the hose is anchored...
  12. Q

    Hitachi ex120-3 cavitation/aeration

    Hello all, looking for some help diagnosing my old beater. In the past few hours of use, the machine will whine like it's out of fluid under heavy load, particularly when swinging, but eventually with any function. Power is about 1/2 what it was before issue. The hydro tank is very bubbly after...
    • qwertylad
    • Thread
    • cavitation ex120-3 hitachi hydraulic
    • Replies: 12
    • Forum: Excavators
  13. A

    Need Help with Komatsu PC55 **Possible Hydraulic Issue**

    I have a Komatsu PC55-MR3 that I purchased from China and got it shipped here in Calgary, Canada. The machine was dropped at a Komatsu dealership and they filled up the machine with fluids and diesel and performed the following work: Filled hydraulic fluid, engine oil & coolant Change the...
    • Amjad.kamal
    • Thread
    • hydraulic komatsu mini excavator pc55mr-3
    • Replies: 22
    • Forum: Excavators
  14. Z

    Issue in electric hydraulic pump system

    One hypothesis is that there is air in the line but there may be a larger story at play. Please see the full length of this 60 second video. A few details: -the issue does not present when initially running the pump, but presents after making 10-15 presses -I checked the hydraulic reservoir...
  15. T

    CAT257B. Does not want to turn when it warms up. lift arm cylinders leaking down while running.

    I have a 2005 CAT257B. The lift arm cylinders will leak down fast while running the machine. You have to hold back on the joystick to keep it up. If you turn the machine off it does not leak down. I have repacked the cylinders and it still does it. Also, when the machine warms up it does not...
  16. A

    JD 160C LC Hydraulic Noise

    Good day everyone! We've got a 160C LC, ~8000hrs on it, that's recently tarted having a very loud hydraulic whining, sounds like the main pump is cavitating. I'm certain it is because as the unit runs the oil gets foamy and in the sight glass and starts to get louder and louder. The unit never...
    • AAVDTECH
    • Thread
    • excavator hydraulic hydraulic oil john deere john deere 160clc john deere 160lc
    • Replies: 6
    • Forum: Excavators
  17. N

    New family member - 1966 Austin Western Super 300

    Hi folks, I recently acquired a 1966 Austin Western Super 300 that is in pretty nice shape apart from one hydraulic leak. Serial number is V366-10630. I also recently enjoyed browsing through Dwan Hall's restoration of his AW grader - extremely impressive! My first two questions for this...
    • np.mdbr
    • Thread
    • austin western grader hydraulic manuals super 300
    • Replies: 12
    • Forum: Motor Graders
  18. B

    D4C hydraulic oil cooler failed 5th time

    I have a 2001 Caterpillar D4C hystat LGP. I am in the process of replacing the hydraulic oil cooler for the 5th time since I bought it in 2008. All of the coolers have failed in the same area. (bottom right corner). The parts department at my local caterpillar dealership is telling me that’s the...
    • blanchb
    • Thread
    • cooler d4c hydraulic hydraulic cooler
    • Replies: 9
    • Forum: Dozers
  19. C

    Cat 950F Hydraulic overflow

    I work for a snow removal company. We have an older Cat 950F. Yesterday, we discovered Hydraulic oil leaking out of the filler cap after lunch. We let it cool, still overflowing. I didn't notice any obvious aeration or any off-color in the fluid. Is there something that could cause an overfill...
  20. T

    1980 New Holland L775 Skid steer slow cranking issues

    Hello I have owned this machine for about a year. It is a 1980 New Holland L775 with a 4 cyl duetz deisel engine. I had been having an issue on and off where I was dealing with a slow cranking issue. I have replaced battery cables and terminals. One of the first times this happened was when i...
    • thatgumwrap
    • Thread
    • electrical hydraulic new holland new holland l7750 skid steer
    • Replies: 4
    • Forum: Skid Steers
Top