Results 1 to 10 of 10
  1. #1
    Silver Member
    Join Date
    Oct 2012
    Posts
    147
    Location
    Langley BC
    Tractor
    Mihindra 3616

    Default bobcat 334 excavator no hydraulics????

    Friend has just got a 334 excavator, pulled a few blackberry bushes and the hydraulics just stopped. Fluid was a little low so he topped it up. engine shows no fault codes. Any ideas?
    no blown fuses, interlock down causes light to light on control panel.
    Cam

  2. #2
    Silver Member
    Join Date
    Jun 2012
    Posts
    190
    Location
    grain valley mo.
    Tractor
    farmall 40

    Default Re: bobcat 334 excavator no hydraulics????

    does the blade opperate without the interlock down normally? and now it does not? if so it may be the coupling between the engine and hydraulic pump. lt190b

  3. #3
    Veteran Member brain55's Avatar
    Join Date
    Jan 2008
    Posts
    1,772
    Location
    Brentwood, CA

    Default

    Yep sounds like the pump coupler. We had one that the drive would slide back on the pump shaft until it wasn't engaged anymore.

    Brian

  4. #4
    Silver Member
    Join Date
    Oct 2012
    Posts
    147
    Location
    Langley BC
    Tractor
    Mihindra 3616

    Default Re: bobcat 334 excavator no hydraulics????

    Thanks for your responses. I was afraid that would be the problem. The blade does not move at all. Does anyone know how to get into the interlock control, there are several screws on the bottom but as it is not my machine, I am reluctant to take it apart. Is the hydraulic fluid controlled through a solenoid or is it a valve? Cam

  5. #5
    Veteran Member SSdoxie's Avatar
    Join Date
    Jun 2010
    Posts
    2,381
    Location
    Cumberland Plateau, TN
    Tractor
    Bobcat CT225

    Default Re: bobcat 334 excavator no hydraulics????

    The blade is mechanical linkage control. The interlock has no control of function over the blade, if the blade does not move up or down the pump is not turning. Remove the pump and check the coupler as advised above. Remote possibility the main relief or flushing valve spool in the control is stuck wide open but pump coupler is the more common found cause.
    If the blade is functioning and interlock light goes on/off with the left arm rest, problem is not in the switch on the arm rest so DO NOT take it apart. The switch sends signal to the main controller which turns the light on & off plus sends a signal to a electric solenoid which opens to send pilot oil pressure to the rest of the control valve. Either the solenoid is stuck or the, connection problem in wire from controller to the solenoid, or the accumulator has failed.
    Dennis

    CT225 w/7TL QA FEL, 60"tooth dirt bucket, 68" smooth bucket, Pallet Forks, Bale Spear. Hydrualic top llin, QH, 48 RC, 60" tiller, Angle blade, Landscape rake, Carry-all, Post hole auger.

  6. #6
    Silver Member
    Join Date
    Oct 2012
    Posts
    147
    Location
    Langley BC
    Tractor
    Mihindra 3616

    Default Re: bobcat 334 excavator no hydraulics????

    Thanks Dennis
    I have been working this Morning and Don is working as well so no action until later today.
    We wil check the coupling and the pilot solenoid as first steps. As the machine is new to him, he will most likely get the selling dealer (20 min running, mostly unloading and driving to the blackberries) out if we can not get it without too much bother. I should be able to hear the interlock SV click as Don operates the interlock bar.
    Cam

  7. #7
    Platinum Member
    Join Date
    Jul 2007
    Posts
    956
    Location
    S. Central TX Hill Country

    Default Re: bobcat 334 excavator no hydraulics????

    I have to add that it is wonderful to have someone as knowledgeable as Doxie come in and comment.
    Hope you get it figured out quickly. Good luck!
    Brush Chipping and Tree Mulching Texas Style!

  8. #8
    Silver Member
    Join Date
    Oct 2012
    Posts
    147
    Location
    Langley BC
    Tractor
    Mihindra 3616

    Default Re: bobcat 334 excavator no hydraulics????

    Thanks for all your input.
    Clicking when moving the interlock is pointing towards the pump coupling. defeated by darkness last night.
    Cam

  9. #9
    Silver Member
    Join Date
    Oct 2012
    Posts
    147
    Location
    Langley BC
    Tractor
    Mihindra 3616

    Default Re: bobcat 334 excavator no hydraulics????

    Coupler gone on motor end, patched enough to move it back to whence it came.
    Thanks again, Cam

  10. #10
    Veteran Member SSdoxie's Avatar
    Join Date
    Jun 2010
    Posts
    2,381
    Location
    Cumberland Plateau, TN
    Tractor
    Bobcat CT225

    Default Re: bobcat 334 excavator no hydraulics????

    Thanks for letting us know.
    Dennis

    CT225 w/7TL QA FEL, 60"tooth dirt bucket, 68" smooth bucket, Pallet Forks, Bale Spear. Hydrualic top llin, QH, 48 RC, 60" tiller, Angle blade, Landscape rake, Carry-all, Post hole auger.

Similar Threads

  1. Problem with Blade cylinder on Bobcat 334 excavator
    By wingfootedgodhead in forum Hydraulics
    Replies: 1
    Last Post: 09-18-2013, 07:54 AM
  2. Price Check & ?s on a Bobcat 334
    By cederstrand in forum Bobcat Construction Equipment
    Replies: 2
    Last Post: 02-14-2012, 10:52 AM
  3. Bobcat 334 super structure lock
    By stocky in forum Bobcat Construction Equipment
    Replies: 0
    Last Post: 01-29-2011, 02:56 PM
  4. Bobcat 334 Bucket Teeth
    By Mainah334 in forum Bobcat Construction Equipment
    Replies: 2
    Last Post: 12-20-2010, 10:05 PM
  5. For Sale: 2006 Bobcat 334 - $24900
    By Marshall in forum Dealer Ads
    Replies: 0
    Last Post: 03-15-2010, 03:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2016 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.