Farm Equipment - Hydraulic problems on a D17 Series 4

Print Page | Close Window

Hydraulic problems on a D17 Series 4

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=23804
Printed Date: 23 Feb 2025 at 3:02am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Hydraulic problems on a D17 Series 4

Posted By: steve0329
Subject: Hydraulic problems on a D17 Series 4
Date Posted: 10 Jan 2011 at 9:54am

I'm looking for the hydraulic schematic for the D17 series 4. I'm having a little trouble with the hydraulics and I don't think it is the pump, I'm thinking it might be a stuck relief valve or something along those lines. Also if anyone has it I'm looking for an exploded view of the control valve itself.

Thanks for any help you can give me.

Replies:

Posted By: DrAllis
Date Posted: 10 Jan 2011 at 12:27pm

Exactly what is it doing/not doing??

Posted By: steve0329
Date Posted: 10 Jan 2011 at 3:26pm

It has very limited pressure and it can't lift implements but you can tell that its trying to.

Posted By: John (C-IL)
Date Posted: 10 Jan 2011 at 4:28pm

Make sure your traction booster lever isn't stuck. A couple of us have had that problem. 5 minutes with some PB Blaster and a couple of 7/16" wrench solved the problem. If your traction boost is stuck to the light side it would do that.

Posted By: DSeries4
Date Posted: 10 Jan 2011 at 10:05pm

John, that fix is for hydraulics that will not lower.

If you are having problems lifting, start with the obvious: check the fluid level. Is your low oil pressure light working? That can give you some insight to your problem as well.

-------------
'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080

Posted By: skipwelte
Date Posted: 11 Jan 2011 at 1:33pm

Ya gotta look in the 170 book for the schematic for a series IV hyd system, they never updated the D17 book with series IV hydralics. It sounds to me like the main relief valve is defective, it will try to lift but wont you may hear a gush or not. You can swap the main relief with the traction booster relief to test, the traction booster relief is set lower than the main relief. I dont have a scanner so I cant put it on for ya. HTH