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John deere 4720 Tractor Hydraulic Trouble

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mcnasty1873
Join Date: Jun 2015
Posts: 5 Goatneck, Tx
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2015-06-05          192899


I have a 2007 4720 with about 450hrs on it. After about an hour of use when it is at operating temp, the power steering starts to jerk like a car with low steering fluid. awhile later the tractor will start surging and jerking. even later the impliments will start to not work and the tractor won't even pull itself. I bought the tractor new. I have no idea what is going on. any help is greatly appreciated..

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John deere 4720 Tractor Hydraulic Trouble

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joyce1
Join Date: May 2004
Posts: 30
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2015-06-05          192900


When is the last time you changed the hydraulic fluid and filters?

Is there air/water in the hydraulic fluid?

....

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____________________________________________________________________________________
John deere 4720 Tractor Hydraulic Trouble

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mcnasty1873
Join Date: Jun 2015
Posts: 5 Goatneck, Tx
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2015-06-05          192901


I have never serviced the hydraulic system. not sure about air or water either. is there a place online that shows how to service the system. sorry for the ignorance but I' not much of a mechanic. ....

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John deere 4720 Tractor Hydraulic Trouble

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DennisCTB
Join Date: Nov 1998
Posts: 2644 NorthWest NJ
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2015-06-05          192902


Most hydro tractors recommend that you change fluid and filters at 50 hours and then every 300 hours.

The operators manual that came with the machine should show you where the drain plug and fill locations are.

I would start with this first and use only the recommended fluid from Deere so you can eliminate using the wrong off brand issue.

Here is a link to the documentation on the John Deere site:

http://www.deere.com/servlet/com.deere.u90785.productcatalog.view.servlets.PublicationsListServlet?equipID=19955&language=english&searchCriteria=tractor&exactModelSearchFlag=off&orderBy=language ....

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____________________________________________________________________________________
John deere 4720 Tractor Hydraulic Trouble

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mcnasty1873
Join Date: Jun 2015
Posts: 5 Goatneck, Tx
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2015-06-05          192903


Thanks all I will give this a try. ....

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John deere 4720 Tractor Hydraulic Trouble

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PaulChristenson
Join Date: Dec 2007
Posts: 76 Vermont
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2015-06-06          192910


Service Intervals

Servicing Your Machine
IMPORTANT: Avoid damage! Operating in extreme conditions may require more frequent service intervals:

Engine components may become dirty or plugged when operating in extreme heat, dust or other severe conditions.

Engine oil can degrade if machine is operated constantly at slow or low engine speeds or for frequent short periods of time.


Please use the following timetables to perform routine maintenance on your machine.

As Needed
Replace alternator belt.

Replace air filter elements (see air restriction indicator).

Replace cab air filters.

Replace light bulbs.

Replace fuses.

Clean and replace battery.

Replace radiator hoses and clamps.

Check tire air pressure.

Clean fuel tank overfill reservoir.

Drain water and sediment from fuel tank, and service water separator.

Check and adjust front wheel toe-in.

Check and clean grille and side screens.

Check and clean radiator cooling screen.

Clean debris from engine compartment.

Adjust all cables to acquire appropriate travel for engagement (cabs).

After First 10 Hours
Check wheel bolt torque.

Check cab rollover protection system mounting hardware torque.

Check windshield wiper arm mounting hardware torque.

Every 10 Hours or Daily
Test safety systems.

Check engine oil level.

Check transmission oil level.

Check air filter rubber dust unloading valve.

Check radiator coolant level.

Every 50 Hours
Check front axle oil level.

Lubricate machine.

Check cab protection system mounting hardware torque.

Clean or replace cab air filters.

Every 200 Hours
Change engine oil and filter.

Inspect alternator belt.

Check air restriction indicator light.

Check wheel bolt torque.

Every 400 Hours
Change engine oil and filter (if John Deere PLUS-50 is used).

Change transmission oil and filter.

Clean transmission suction screen.

Replace fuel filter.

Every 600 Hours
Check engine low idle speed.

Check air filter intake hoses and clamps.

Change front axle oil.

Check front axle thrust bolt torque.

Check brake adjustment.

Yearly
Change engine oil and filter if less than 200 hours of operation.

Drain water from fuel tank and replace fuel filter.

Check all hoses and clamps.

Every 1200 Hours
Check and clean inline hydraulic filter.

Check engine valve clearance. See your John Deere dealer.

Every Two Years or 2000 Hours
Flush and replace factory coolant. Flush cooling system and replace coolant with John Deere COOL-GARD engine coolant.

Service fuel injection nozzles.
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____________________________________________________________________________________
John deere 4720 Tractor Hydraulic Trouble

View my Photos
PaulChristenson
Join Date: Dec 2007
Posts: 76 Vermont
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2015-06-06          192911


Here is your Operator's Manual http://manuals.deere.com/cceomview/OMLVU19619_E9/Output/Index.html?tM=FR ....

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