420 hydraulics

General help and support for your Lindeman through 2010 John Deere crawler
Post Reply
gus
2010 crawler
2010 crawler
Posts: 696
Joined: Mon Jul 16, 2007 11:55 am
Location: North West
Contact:
Contact gus

420 hydraulics

Post by gus » Wed Mar 20, 2013 9:59 am

What is the GPM needed for a 6 way dozer to operate??

I need to replace my front pump (not factory) and have no idea what it is now and no name or ID on the present pump. Lift Cyl are 3"X20" on my dozer (also after market).
Top
User avatar
Lu47Dan
1010 crawler
1010 crawler
Posts: 401
Joined: Mon Feb 11, 2008 3:17 pm
Location: NWPa

Post by Lu47Dan » Wed Mar 20, 2013 8:45 pm

6 to 8GPM should be plenty.
You need to size the pumps maximum output to the top rpm of the engine.
Pumps are sized by cubic inches per revolution,
Cu.in per rev X RPM = Cu.in per minute.
Cu.in per minute / 231 = Gallons per minute.
Hope this helps.
Dan.
1956 420C with GSC blade
Tools are to men as shoes are to women , you can never have too many !!
Used diesel engines are an adventure any way you look at them !!
Top
gus
2010 crawler
2010 crawler
Posts: 696
Joined: Mon Jul 16, 2007 11:55 am
Location: North West
Contact:
Contact gus

Post by gus » Thu Mar 21, 2013 6:02 pm

Thanks for the answers. I was thinking 10 GPM and that's probably where I'll go. I will have to rebuild the mount because the old pump was bottom mounted, directly in the pump housing. Since the probability of snow is near zero now (it's snowing right now) I think I'll wait a while. :wink:
Top
Post Reply

Return to “Early model JD crawler technical support”

Who is online

Users browsing this forum: No registered users and 66 guests