Jcb 3c ii ram problem

Discuss loaders/backhoes here

martyn williams
Posts: 6393
Joined: Mon Nov 03, 2008 8:06 pm
Real name: MARTYN WILLIAMS
Location: South Wales
Has thanked: 296 times
Been thanked: 356 times

Re: Jcb 3c ii ram problem

Post #11 by martyn williams » Tue Sep 28, 2010 2:35 pm

William

It does point to valve block problem,can you get hold of a test guage to check the pressures ? also it may be that you have worn seals in the rams.
What I would do is,start from the beginning,oil condition level,filters.etc
Does your hydraulic pump squeel ? Try to get hold of a valve block as there must be a few breaker machines around.
Good luck
Martyn

User avatar

TullyveeryClassicJCB
Posts: 689
Joined: Sat Oct 03, 2009 8:49 pm
Real name: William Mulholland
Location: County Down
Has thanked: 7 times
Been thanked: 42 times
Flag: Great Britain

Re: Jcb 3c ii ram problem

Post #12 by TullyveeryClassicJCB » Tue Sep 28, 2010 3:16 pm

The oil level, condition and filter is all fine. Im beginning to think the valve block is where I should start. In my other diggers between "raise" and "level raise" there is like a resistance a barrier that you have to pull the lever through to get to the level raise position. In this digger the lever just goes straight through "raise" and into "level raise."
William

JCB Hydra Digger Loadall 65
JCB 3DIII Powertrain
JCB 3DIII (Manual)
JCB 3DII
JCB 3CIII
JCB 805B


Stormin
Posts: 258
Joined: Sat Sep 05, 2009 9:44 pm
Real name: Norman
Has thanked: 2 times
Been thanked: 15 times
Flag: Great Britain

Re: Jcb 3c ii ram problem

Post #13 by Stormin » Tue Sep 28, 2010 8:27 pm

If you suspect the valve block, could you not swap the connections with the bucket crowd/tip side of block and see if there's any difference?

User avatar

TullyveeryClassicJCB
Posts: 689
Joined: Sat Oct 03, 2009 8:49 pm
Real name: William Mulholland
Location: County Down
Has thanked: 7 times
Been thanked: 42 times
Flag: Great Britain

Re: Jcb 3c ii ram problem

Post #14 by TullyveeryClassicJCB » Tue Sep 28, 2010 9:32 pm

Norman, i'll do that before I do anything. I hope it isnt the valve block. It looks a real bitch to take out.
William

JCB Hydra Digger Loadall 65
JCB 3DIII Powertrain
JCB 3DIII (Manual)
JCB 3DII
JCB 3CIII
JCB 805B

User avatar

TullyveeryClassicJCB
Posts: 689
Joined: Sat Oct 03, 2009 8:49 pm
Real name: William Mulholland
Location: County Down
Has thanked: 7 times
Been thanked: 42 times
Flag: Great Britain

Re: Jcb 3c ii ram problem

Post #15 by TullyveeryClassicJCB » Mon Oct 04, 2010 4:55 pm

I swapped the hoses around on the valve block and its made no difference. With the bucket raised it still drops a bit. Time to whip out the rams! The bottom pins look like real bitches.
William

JCB Hydra Digger Loadall 65
JCB 3DIII Powertrain
JCB 3DIII (Manual)
JCB 3DII
JCB 3CIII
JCB 805B


martyn williams
Posts: 6393
Joined: Mon Nov 03, 2008 8:06 pm
Real name: MARTYN WILLIAMS
Location: South Wales
Has thanked: 296 times
Been thanked: 356 times

Re: Jcb 3c ii ram problem

Post #16 by martyn williams » Mon Oct 04, 2010 8:13 pm

Can you leave the cylinders in place and just remove the caps and rods ?
Martyn


essexpete
Posts: 2951
Joined: Fri Jul 13, 2007 12:43 am
Real name: essexpete
Has thanked: 546 times
Been thanked: 358 times

Re: Jcb 3c ii ram problem

Post #17 by essexpete » Mon Oct 04, 2010 8:47 pm

I would agree with Martyn on that. You have not got to lift the full weight if you leave the cylinder in place.


Return to “Loaders/Backhoes”

Who is online

Users browsing this forum: No registered users and 5 guests