JDcrawlers Messageboard

Sorry I slipped and misplaced the decimal point. Dimension in manual is 2.000" +/- 0.030" for the finger height.

Hi John, No problem. If I stand (long legs down) the JD227 gauge I got from Lavoy a couple years back on a flat surface it is 2.000" from the surface to the center "tab". This gauge has the notch cut out on the left side of the center tab as shown in your photo, it does not have the angled cut on th...

The JD227 gauge is 2.000 +/- 0.03". from the end of the legs to the tab the fingers contact.

From the section covering adjusting the clutch levers with the JD227 gauge in a 450B manual: "Place the gauge over the pressure plate with the gauge legs resting on the flywheel and notched area over a clutch lever. Move the adjusting screw in or out to place clutch levers at the proper level (2.000...

The site has a dedicated picture server you need to contact Lavoy to get set up with access. There is info about it in the Message board Q&A and Announcement section. In the FAQ section, one of the first posts has a copy of the service bulletin on how to adjust clutches. I believe you need a JD7 gau...

The pump must have been capable of more than 1080 psi or the main relief wouldn't be that much. As far as how much pressure a cam pump in excellent condition could develop before it blows the seals or splits the housing, I can't tell you. Here is what I found in my 420/430 service manual for the cam...

I believe you mentioned in an earlier post that the relief setting was supposed to be 1040 psi to 1080 psi at a fast idle, from your book. A good pump would do that much and more I expect. Lavoy or Stan have likely seen how much higher they can push and can answer that question better. Lavoy said it...

Definitely need to do something to reduce that, along with fixing the pump, not good for the system to be able to run at over double the design limit. If there is no cartridge available to go into your control valve; you may be able to get a stand alone adjustable relief valve, and plumb it into the...

Buying a new relief cartridge should eliminate the pressure question, I would think 1000 psi would do for your needs with out adding the adjustable relief they mention in the manual, just my opinion. It would be a long shot, but the right hydraulic shop might have a way to test your present relief v...

dtoots1, Below is a link to the Vickers mobile equipment valves manual I found using the numbers you found on your valve. This is the document that references the preset relief valves they use. It appears they are not field adjustable from this document. You can see if it matches what you have, from...

420s, 430s wheeled and crawler as well as the 440 I wheel tractor should have the right cam pump I believe.

I believe you need a pump from a 420 series or newer. Stan or Lavoy can likely answer for sure, but I believe the inlet size was increased starting with the 420s and the gpm was more, based on other posts from them. Lavoy was recently corresponding with someone who had a similar pump question and co...

Assuming that is a Vickers valve, from what you have posted for numbers, and we have found on the web, it looks to me like it closely resembles what they call their CM line for mobile equipment now. There is an online manual for Vickers CM valves (you may have found this, if you haven't try searchin...

Is the 222627 a number cast on one end section the valve? Did John Deere use Vickers valves? That number shows up in Vickers info when searched. If that is what it is, it appears to be a section of a stack type valve you can add sections to. On eBay there is currently a "pre-owned" single spool valv...

Hi,

Perhaps if you would post a few pictures of your valve and control set up it would help find answers to your questions. It sounds like your valve set up is not a standard 440IC valve arrangement. You have one 3 spool valve and normal was two separate valves.