Model 420 hydraulic blade question.

General help and support for your Lindeman through 2010 John Deere crawler
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mc40joe
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Model 420 hydraulic blade question.

Post by mc40joe » Thu Oct 23, 2014 8:36 pm

Is there an adjustment on the control valves so you may stop blade at any height?

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Lavoy
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Post by Lavoy » Thu Oct 23, 2014 9:55 pm

Not sure I understand the question? When you let go of the hyd lever, the blade should stop moving no matter where it is at.
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mc40joe
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Post by mc40joe » Fri Oct 24, 2014 7:25 am

when you let go of the handle unless it at the top it goes back down. model 420 c with heavy duty blade

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Lavoy
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Post by Lavoy » Fri Oct 24, 2014 8:17 am

Usually that is bad cylinder seals, either way, not a setting on the valve.
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mc40joe
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Post by mc40joe » Fri Oct 24, 2014 11:48 am

thank you it has two cylinders on it should both be rebuilt

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Stan Disbrow
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Post by Stan Disbrow » Fri Oct 24, 2014 2:07 pm

Hi,

Yes, since each cylinder only has about the capacity to lift half of the blade weight on a 62 (the model number of the bulldozer attachment).

Stan
There's No Such Thing As A Cheap Crawler!

Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
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mc40joe
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Post by mc40joe » Fri Oct 24, 2014 2:26 pm

thank you for the help are there kits for them from deere or any one you know

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Lavoy
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Post by Lavoy » Fri Oct 24, 2014 4:03 pm

Check with a local hyd shop, if not, give me a call.
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mc40joe
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Post by mc40joe » Sat Oct 25, 2014 8:13 am

OK THANK YOU FOR YOUR HELP

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