ok talked to jd. Not sure how knowledgeable the gentleman i talked to was, but he said the filter does all the hydraulics. He also suggested a plugged p/u screen could cause this. That doesnt make much sense to me . I did see a prv in the power reverser (shuttle shift) . I am going to clean up the pu screen and see what happens. cant hurt to do it anyway.
4600 blowing hydraulic filter
- Thread starter junkyard
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Jerry/MT
Elite Member
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- Feb 2, 2008
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- North Idaho-The Palouse
- Tractor
- New Holland TD95D, Ford 4610 & Kubota M4500
I don't see how a clogged pump pick up screen can be causing your problem but it will cause slow hydraulics because of the reduced flow.
oldnslo
Super Member
junkyard,
I agree with jerry that a clogged pick-up screen would not cause these issues. I have tried looking at JD parts to se if i could figure out how or where the filter is positioned in the circuit. Best that I can determine is that this filter supplies oil to the shuttle shift or HST charge depending on tractor model. Both of these circuits would be low pressure so I don't believe this is the whole system filter. I could easily be wrong on this also.
This model has two separate pumps, one for steering and one for SCV. I am not sure which pump this filter is connected to. Best guess would be steering return since this is a common way of supplying flow/pressure to HST charge and or shuttle shift/tranny lube, etc.
1) Is this a simple spin-on filter like what is used on car engines?
2) Do you have access to hydraulic schematic or would you dealer give you one?
Roy
I agree with jerry that a clogged pick-up screen would not cause these issues. I have tried looking at JD parts to se if i could figure out how or where the filter is positioned in the circuit. Best that I can determine is that this filter supplies oil to the shuttle shift or HST charge depending on tractor model. Both of these circuits would be low pressure so I don't believe this is the whole system filter. I could easily be wrong on this also.
This model has two separate pumps, one for steering and one for SCV. I am not sure which pump this filter is connected to. Best guess would be steering return since this is a common way of supplying flow/pressure to HST charge and or shuttle shift/tranny lube, etc.
1) Is this a simple spin-on filter like what is used on car engines?
2) Do you have access to hydraulic schematic or would you dealer give you one?
Roy
My suggestion at this point if you have not already done it, would be to disconnect the BH and FEL. To determine if they are or not the problem. If you have not cleaned, the suction screen I would do that. I included the URL to the operators manual, should others want to look at it.
I found this thread of interest. My summary freezing water in the hydraulic system caused the first filter to go and maybe parts of it are still in the system.
http://www.tractorbynet.com/forums/hydraulics/159965-jd-300-industrial-loader-blowing.html
You may want to purchase a tech. manual. Take a look at selectmanuals.com
http://manuals.deere.com/cceomview/OMLVU11184_E0/Output/Index.html?tM=FR
I found this thread of interest. My summary freezing water in the hydraulic system caused the first filter to go and maybe parts of it are still in the system.
http://www.tractorbynet.com/forums/hydraulics/159965-jd-300-industrial-loader-blowing.html
You may want to purchase a tech. manual. Take a look at selectmanuals.com
http://manuals.deere.com/cceomview/OMLVU11184_E0/Output/Index.html?tM=FR
Looking at tractordata.com the 4600 is an open-center hydraulic system. The following is from the tech. manual for 5X10 looking at JD parts in principle the 4600 and 5X10 operate the same. If it would be of value I can print, scan and post picture to go with (Letters). Note at bottom cause of excessive pump pressure.
The hydraulic system uses an open-center design. This means that low pressure oil flows continuously through the valves and lines as long as the valves are in a neutral position. Because of this flow of oil there always must be a way for the oil to return to the reservoir.
The transmission case (M) of the tractor serves as a reservoir for the hydraulic oil. Proper level must be maintained for adequate transmission lubrication and oil supply to the hydraulic pumps (A and B). The engine drives the hydraulic pump from the camshaft drive gear. As the hydraulic pump turns, a low- pressure area develops in the suction line (C). Oil then moves from the transmission case through mesh filter (I) and 25-micron filter canister (G), then on through suction line (C) to the inlet side of the hydraulic pumps.
Oil flows from the outlet side of the hydraulic pump, through pressure line (D) to inlet housing (J). A relief valve (H) limits hydraulic system pressure to a range of 18995?9685 kPa (190.1?96.9 bar) (2755?855 psi). If the system encounters sufficient resistance to oil flow due to a heavy load or restriction, the relief valve opens, allowing oil to return to the reservoir. The inlet housing (J) also provides a mounting location for up to three optional selective control valves. (See this group for selective control valve oil flow.)
Oil flows from the inlet housing to the rockshaft valve (K). A flow regulating valve controls the amount of oil flow to the rockshaft (L) so it will rise at a constant rate regardless of engine speed. When in neutral, the rockshaft control valve passes oil to the sump. When the control valve is actuated by movement of control lever (E) or by the draft sensing linkage, oil passes to or from the rockshaft cylinder, raising or lowering the 3-point hitch.
Excessive Pump Pressure CONDITIONS:
Test Location Normal If Not Normal
1. Relief valve. Pressure within specifications. Adjust relief valve.
2. Outlet line. Free of kinks and restrictions. Replace line.
3. Rockshaft feedback linkage. Proper hitch free-play. Adjust linkage.
4. SCV, if equipped. Free to return to neutral position. Operate SCV levers. Check for pressure
change. Repair or replace SCV valve.
5. Hydraulic diverter plug port. No plug installed. No optional equipment installed Remove diverter plug in end plate.
Remove any auxiliary hydraulic equipment.
The hydraulic system uses an open-center design. This means that low pressure oil flows continuously through the valves and lines as long as the valves are in a neutral position. Because of this flow of oil there always must be a way for the oil to return to the reservoir.
The transmission case (M) of the tractor serves as a reservoir for the hydraulic oil. Proper level must be maintained for adequate transmission lubrication and oil supply to the hydraulic pumps (A and B). The engine drives the hydraulic pump from the camshaft drive gear. As the hydraulic pump turns, a low- pressure area develops in the suction line (C). Oil then moves from the transmission case through mesh filter (I) and 25-micron filter canister (G), then on through suction line (C) to the inlet side of the hydraulic pumps.
Oil flows from the outlet side of the hydraulic pump, through pressure line (D) to inlet housing (J). A relief valve (H) limits hydraulic system pressure to a range of 18995?9685 kPa (190.1?96.9 bar) (2755?855 psi). If the system encounters sufficient resistance to oil flow due to a heavy load or restriction, the relief valve opens, allowing oil to return to the reservoir. The inlet housing (J) also provides a mounting location for up to three optional selective control valves. (See this group for selective control valve oil flow.)
Oil flows from the inlet housing to the rockshaft valve (K). A flow regulating valve controls the amount of oil flow to the rockshaft (L) so it will rise at a constant rate regardless of engine speed. When in neutral, the rockshaft control valve passes oil to the sump. When the control valve is actuated by movement of control lever (E) or by the draft sensing linkage, oil passes to or from the rockshaft cylinder, raising or lowering the 3-point hitch.
Excessive Pump Pressure CONDITIONS:
Test Location Normal If Not Normal
1. Relief valve. Pressure within specifications. Adjust relief valve.
2. Outlet line. Free of kinks and restrictions. Replace line.
3. Rockshaft feedback linkage. Proper hitch free-play. Adjust linkage.
4. SCV, if equipped. Free to return to neutral position. Operate SCV levers. Check for pressure
change. Repair or replace SCV valve.
5. Hydraulic diverter plug port. No plug installed. No optional equipment installed Remove diverter plug in end plate.
Remove any auxiliary hydraulic equipment.
great information. I am stuck right now due to snow cant move it. I refuse to work on hydraulics in the mud. As soon as the snow melts i will start checking things out, should be tomorrow. I dont think there is anyway for me to check the pressure, about the time it builds up the oring blows on the filter. I am hoping the minor crack in the filter will hold til i can get the problem resolved. I will go through the list posted. if u have time to post the schematic that would be wonderful. and thank u all very much
thanks for all the info already. I had to put it on the back burner for a bit. I found the pressure relief valve in the valving for the bucket, i removed it , it look clean. I could force it to move about 1/32 of an inch, not sure how much it should move and how hard it should be forced i assume with more pressure than it is set for. any help is appreciated. at 50 bucks a pop, i dont want to put another filter on it without at least having a hope its fixed. thanks in advance