The Forestry Forum is sponsored in part by:

TURBOSAWMILL GIANT SALE ON NOW UNTIL OCTOBER 31st


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.


Sawmill & Woodlot Magazine



Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

BRUTE FORCE Authorized Dealer

Woodshax Outdoor Vending Solutions

FARMA


Council Tool

Baker Products

ECHO-Bearcat



Author Topic: Tree Farmer C5D Steering  (Read 898 times)

0 Members and 1 Guest are viewing this topic.

Offline jdatwood

  • Full Member
  • **
  • Posts: 61
  • Age: 37
  • Location: Central maine
  • Gender: Male
    • Share Post
Tree Farmer C5D Steering
« on: May 05, 2018, 08:25:31 PM »
Good evening all,
Hoping someone can help me with an issue I have in my steering. Iíve taken the valve and replaced all the seals so it doesnít leak anymore and now when I steer itís very weak unless I have the blade all the way up or down with the blade control actuated (dead heading) at the same time I steer. I donít know if it just needs to be run a bit to purge the air or if thereís an issue in the priority valve inside. I donít have a schematic of that valve. If anyone has run into this or has a valve schematic Iíd love to see it. I cannot imagine itís something in the valve other than one of those ball bearing seats maybe not quite in right and I doubt that. 

Offline mike_belben

  • Senior Member x2
  • *****
  • Posts: 3086
  • Location: Middle TN
  • Pulp Friction
    • Share Post
Re: Tree Farmer C5D Steering
« Reply #1 on: May 05, 2018, 09:58:27 PM »
Im gonna guess the blade spool is downstream of the steering spool or orbital valve.  That the pressure rise in the circuit is from the blockage being created by the blade spool, and that this is the pressure that is making your steer circuit work.  

If my guess is correct it indicates that your steer spool is not building full pressure, because the path back to tank is not being fully blocked by the steer spool or the relief in that circuit is bypassing.   

This could be a relief in backwards or spring missing, trash in the seat, seal/oring issue.  Could be valve spool backwards, in the wrong bore, misadjusted, detent or back cap issue, maybe plumbed wrong i guess..  Lot of ways.  A gauge will show the low working pressure and a temp gun may indicate the leaky spot.  Fluid flowing over a valve generates heat.
Revelation 3:20

Offline jdatwood

  • Full Member
  • **
  • Posts: 61
  • Age: 37
  • Location: Central maine
  • Gender: Male
    • Share Post
Re: Tree Farmer C5D Steering
« Reply #2 on: May 06, 2018, 07:43:02 AM »
Okay, thanks for that detailed response. Your correct, the blade spool is downstream of the steering valve. Sounds like I need to pop out those spring/ball bearing units (not sure what their called). One must be bound up or spring in backwards allowing leakage past the ball. What your saying makes perfect sense to explain whatís happening. Iíll give that a go and see what I can find...

Offline mike_belben

  • Senior Member x2
  • *****
  • Posts: 3086
  • Location: Middle TN
  • Pulp Friction
    • Share Post
Re: Tree Farmer C5D Steering
« Reply #3 on: May 06, 2018, 08:57:09 AM »
Yeah it should make pressure from pump to steer valve and have almost none in the exhaust port, but something is failing to divert flow to the rams and block it from continuing down stream (either to tank/exh port or to power beyond port depending on how it is configured)

When you hit the blade you are blocking flow past that valve and creating pressure rise everywhere upstream so that even the exhaust side of the steer valve has sufficient pressure to move the rams.  Youll get more force by pushing blade into the dirt than lifting because its heavier.  The pump needs a load to build pressure into.


I cant tell you exactly what, but something in that steer valve is bypassing.
Revelation 3:20

Offline jdatwood

  • Full Member
  • **
  • Posts: 61
  • Age: 37
  • Location: Central maine
  • Gender: Male
    • Share Post
Re: Tree Farmer C5D Steering
« Reply #4 on: May 06, 2018, 10:32:04 AM »
Your correct about that, when the blade is pressed down firm on the ground and front end lifted the steering will waddle like nobodyís business. Iím gonna go pop those caps off this afternoon that hold the spring and ball bearing seat in to see if one is jammed crooked or something. I canít imagine it being a relief valve due to me not touching them other than to replace the outer seal so they donít leak outside the valve body. Iíll let you know what I find. 

Offline Corley5

  • Senior Member x2
  • *****
  • Posts: 7937
  • Age: 49
  • Location: Wolverine, Michigan USA
  • Gender: Male
  • Wolverine, Michigan
    • Share Post
    • Whittaker Farms
Re: Tree Farmer C5D Steering
« Reply #5 on: May 06, 2018, 10:56:59 AM »
My C4D forwarder did the same thing.  I took the valves off, took them to a hydraulic shop where they were rebuilt and the problem was solved. :) 8)
Burnt Gunpowder is the Smell Of Freedom

Offline jdatwood

  • Full Member
  • **
  • Posts: 61
  • Age: 37
  • Location: Central maine
  • Gender: Male
    • Share Post
Re: Tree Farmer C5D Steering
« Reply #6 on: May 06, 2018, 08:37:33 PM »
Something to be said for the easy button! 

Offline jdatwood

  • Full Member
  • **
  • Posts: 61
  • Age: 37
  • Location: Central maine
  • Gender: Male
    • Share Post
Re: Tree Farmer C5D Steering
« Reply #7 on: May 06, 2018, 08:47:44 PM »
Yeah it should make pressure from pump to steer valve and have almost none in the exhaust port, but something is failing to divert flow to the rams and block it from continuing down stream (either to tank/exh port or to power beyond port depending on how it is configured)

When you hit the blade you are blocking flow past that valve and creating pressure rise everywhere upstream so that even the exhaust side of the steer valve has sufficient pressure to move the rams.  Youll get more force by pushing blade into the dirt than lifting because its heavier.  The pump needs a load to build pressure into.


I cant tell you exactly what, but something in that steer valve is bypassing.
Well...... I fixed it! It wasnít an issue with the relief valve, though I did find a piece of o-ring close to one of them so just a matter of time and that wouldíve been an issue. Hereís what I found.. when I removed the valve to rebuild it there was a stack of washers under each mounting bolt. They were there to give the steering wheel linkage room to clear the shelf it mounted on and allow the valve to actuate. Since I was in there I replaced both rod ends on the linkage as they were both worn all out and sloppy. Someone had even smacked them with a punch in an effort to tighten them back up. The extent people will go to save $25 is amazing... Anyways, since everything was tight I figured the janky set of washers wouldnt be necessary. Turns out I still need the washers to provide ample clearance (poor design). It just so happens when the wheel was turned the other direction it was hitting a hydraulic fitting. Basically I had the perfect storm of hitting things no matter which way I turned the wheel. It turns out the valves do all the work in that last 1/8Ē of stroke and I wasnít quite there. I never noticed it was rubbing as it was such a tiny amount AND when the dash cover was mounted the dash changed angles ever so slightly compounding the issue. Anyways, thanks for your help! Your clearly well versed in fluid power. 

Offline mike_belben

  • Senior Member x2
  • *****
  • Posts: 3086
  • Location: Middle TN
  • Pulp Friction
    • Share Post
Re: Tree Farmer C5D Steering
« Reply #8 on: May 06, 2018, 09:05:04 PM »
Glad to help bud.  That would do it.  If the valve spool cant go full stroke then the lands never fully block the tank passage.  Fluid always chooses path of least resistance to equilibrium pressure.  Current too actually.
Revelation 3:20


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

xx
New (to me) Tree Farmer C5

Started by mjeselskis on Forestry and Logging

94 Replies
22763 Views
Last post January 12, 2015, 09:11:45 PM
by mjeselskis
xx
Tree Farmer ?????????

Started by Autocar on Forestry and Logging

9 Replies
3128 Views
Last post October 17, 2011, 03:54:31 PM
by mad murdock
xx
My Tree Farmer C5D

Started by Bc5turbo on Forestry and Logging

12 Replies
2993 Views
Last post November 13, 2013, 02:41:46 PM
by Bc5turbo
xx
Tree Farmer C4

Started by madmari on For Sale

0 Replies
1743 Views
Last post May 19, 2016, 04:11:29 PM
by madmari
 


Powered by EzPortal