40 c control valve

General help and support for your Lindeman through 2010 John Deere crawler
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lynn kitts
MC crawler
MC crawler
Posts: 1
Joined: Sat Aug 04, 2012 7:50 am

40 c control valve

Post by lynn kitts » Sun Aug 12, 2012 9:08 am

:?: is it normal for blade to go down fast
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JD440ICD2006
350 crawler
350 crawler
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Joined: Tue Aug 22, 2006 3:57 pm
Location: South Carolina

Post by JD440ICD2006 » Sun Aug 12, 2012 9:45 am

What are the conditions?
Is the engine running or shut down?
Are you pushing the control valve to let it down?
1959 JD 440ICD w/64 Power Angle Tilt Blade
1959 JD 440ICD w/63 Manual Angle Blade
1959 JD 440IC w/602 Manual Angle Blade
1959 JD 730D W SE (many options)
1950 JD M S w/M-20 Mower
1952 JD M W
1955 FORD 640 (burns the most fuel)
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JD40c
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Post by JD40c » Tue Aug 14, 2012 1:50 pm

Is the control valve set up to float (it can be)? Are the piston seals on the hydraulic cylinders shot?

In my case, someone had put undersized o-rings on the pistons, so as you can guess, there was a huge internal leak.
1955 John Deere 40C 4-roller
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