720lp

G

GreenBlood

Member

• Apr 20, 2013

• #1

I posted yesterday about needing help finding problem with my three point hyd system can anyone tell me where to start looking do I start with pump

 

B

buickanddeere

Well-known Member

• Apr 20, 2013

• #1

Is there a separate lever on those for the scv and rockshaft? Do the scv "s work?
What are you trying to lift with the three point hitch?
Is there enough clean oil in the system?

 

R

RWT

Member

• Apr 20, 2013

• #1

Since no one else commented, I don't know what a powrtrol is and you did say the oil was good.

If the power steering is run from the system and works that is a clue.

I think I would first put a gauge in the remote circuits and see what you have.

There should be test points in the system but you will need a shop manual most likely to know where they are and what pressures they should be.

I saw this and thought JDSeller and others would comment and still may. I am limiting my comments because I don't know anything specific about your system.

RT (my 2 cents and I hope this helps)

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

there is sep levers for scv an three point scv does not work either have nothing hooked to tractor there is no action with hitch no noise with pump when you either lever

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

powertrol is the three point system power str has a completely different system in the front of the tractor

 

M

Mr. Haney

New User

• Apr 20, 2013

• #1

With the tractor shut off up by the hydraulic pump is a lever about 3 inches long that says "off" and "on" it needs to be turned so the "on" is towards the top this is the hydraulic pump disconnect and is driven off from the governor gear you cannot engage it with the engine running.

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

thanks for both of your reply any input is good

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

am aware of this it does work and in on pos

 

Tx Jim

Well-known Member

Location

Coyote Flats, Texas

• Apr 20, 2013

• #1

Pump is probably turned off.

 

K

Kent Petersen

Well-known Member

• Apr 20, 2013

• #1

your pump may be stuck and the shaft broken contack me if you need a pump i have agood one off a 730

 

U

Unruh

Member

• Apr 20, 2013

• #1

I don't know if the twenty series is any different than the double digit series. I had a "60" and you can't run the remote cylinder and the 3-pt at the same time. On the "60", I had to pull the hydraulic fittings out the back and insert a set of "blanks" to activate the rockshaft.

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

thanks but different on 720 have two dif systems

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

lever is in on position I can even feel when gears mesh i'm thinking pump is not working loosend press line from pump today and got no oil leak

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

do I remove complete pump from gov or just where lines come in

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

your reason makes sense tractor has been sitting for years I have been thinking pump from the start will take off Monday any tricks I should know

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

if needed what do you want for your pump and is it all the pump

 

K

Kent Petersen

Well-known Member

• Apr 20, 2013

• #1

take the lines off and turn it over pull the coil wire frist you will be able see if the gears are turning if not take the pump off and check the gears in the gov there is a small gear between the pump and the gov

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

thanks will try monday

 

OP

OP

G

GreenBlood

Member

• Apr 20, 2013

• #1

do you take line off just the pump or completely off