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Old 12-29-2011, 01:17 PM   #11
steve
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Join Date: Feb 2009
Location: Henniker. NH, USA
Equipment: B7100HST, B5001DT/B5100DT, JD-111H, Chevy K2500 DuraMax, CJ-5, CJ-7, TJ jeeps
Posts: 48
Smile Re: B7100 Directional Control Valve / Pipe Thread question

David
You won't have to throtle down but you can only move the top link or lift the 3pt arms at a time. When the mower is lowered then switch over to the top link and mow away.
Steve
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Old 12-29-2011, 07:26 PM   #12
Bellinghamster
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Location: Bellingham, WA
Equipment: B7100 with FEL
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Default Re: B7100 Directional Control Valve / Pipe Thread question

Pardon if you already know this: The valve in front of the seat is really more a diverter valve than "directional control". It sends flow to either the 3pt lift cylinder or the (plugged) port. Flow is controlled on/off with the 3pt control lever beside the seat regardless what position the diverter valve is in. Flow only goes one way (out the port), so you need an external open center spool valve if you want to power a bi-directional cylinder or motor.

My diverter valve was stuck really solid (previous owner never used it, let the tranny fill with water). I soaked it with Liquid Wrench for a few days, gave it a few taps with a hammper then crossed my fingers and started twisting it with some pliers. It moved just the tiniest bit, but each twist loosened it up more. Now it turns freely 90 degrees. (I had the same problem with the differential lock)

If you accidentally leave or move the diverter valve to the wrong position with the port plugged then move the 3pt control lever, the pressure relieve valve will squeal, but (should) prevent damage to the pump or anything else.
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Old 12-31-2011, 04:57 PM   #13
davidbham
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Location: Whitesburg, TN
Equipment: BX2670 w RCK60B mmm and LA243A fel, Kodiak 48" bush hog, 48" box blade
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Default Re: B7100 Directional Control Valve / Pipe Thread question

Steve,

Tell me about the cylinder you used and how you plumbed it. I see both ports of the cylinder seem to be connected to the same line. Is there any directional flow control on either of the ports?
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Old 01-06-2012, 02:39 PM   #14
davidbham
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Equipment: BX2670 w RCK60B mmm and LA243A fel, Kodiak 48" bush hog, 48" box blade
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Default Re: B7100 Directional Control Valve / Pipe Thread question

I found this hydraulic top link at http://www.agrisupply.com

item # 67464 HYDRAULIC TOP LINK CATEGORY 1, 2" X8" STROKE
This one has a tang on the base end. On my B7100, the top link is mounted between the bases of the ROPS, and needed the extension.

I'll run it from the directional control valve and post pictures when I get it installed.
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Old 01-18-2012, 09:21 AM   #15
davidbham
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Default Re: B7100 Directional Control Valve / Pipe Thread question

Forgot to put the pics up, here they are:
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