hydraulics
hydraulics
Hi everybody and happy holidays! I have a new project , am installing a Thumb to my 420-C loader and am looking for advice as to hose assemblies and if the 420 HYD pump will handle such an addition. Any help is much appreciated, IMO, this is the place for just that
Re: hydraulics
Not a pump issue, thumb should take less flow than main lift cylinders, should work fine.
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
Re: hydraulics
Thank you Lavoy
Re: hydraulics
I installed a thumb on my Terramite T7 loader bucket. I installed hydraulic quick disconnect couplings to reduce the flow down to 3-4 gallons per minute which works out perfect. I also installed a electrical diverted valve plumbed into the loader curl cylinder, that way I did not have to purchase a additional valve. I just momentarily energized the diverted valve with a push button and the hydraulic flow goes to the thumb instead of the curl. My hydraulic pressure is around 2500 psi. I purchased all of the hydraulic components from surpluscenter.com
1956 JD420, gearmatic 8a winch, custom 6 way blade and FOPS.
Re: hydraulics
That sounds awesome notmeu, would you have any pics/schematics or detailed instrucs that I could look at or download? also will the diverter switch work on a 6 volt sys.?
Re: hydraulics
This is not the exact one that I used but very similar
https://www.surpluscenter.com/Featured- ... 9-8602.axd
There is a tap that shows how it is plumbed into the hydraulics. Being that you have 6volts is a problem. I’m sure there is someone out there that sells the same thing in 6vdc but you will have to do some searching!
https://www.surpluscenter.com/Featured- ... 9-8602.axd
There is a tap that shows how it is plumbed into the hydraulics. Being that you have 6volts is a problem. I’m sure there is someone out there that sells the same thing in 6vdc but you will have to do some searching!
1956 JD420, gearmatic 8a winch, custom 6 way blade and FOPS.
Re: hydraulics
Thanks right now I have a starting problem, shut her off two days ago now no spark at coil? any ideas?
- Stan Disbrow
- 350 crawler
- Posts: 2899
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Re: hydraulics
Hi,
Points. Power goes from battery to switch to coil to points to ground. Easy enough to follow even if using just a lightbulb to test. I lose spark, first thing I do is get out the points file and clean the contacts.
Stan
Points. Power goes from battery to switch to coil to points to ground. Easy enough to follow even if using just a lightbulb to test. I lose spark, first thing I do is get out the points file and clean the contacts.
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
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
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
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Re: hydraulics
Do you have a ballast resistor on the coil? They are usually 3 ohms if my memory is accurate
1956 JD420, gearmatic 8a winch, custom 6 way blade and FOPS.
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