English. Please see our pictures and video attach in the viewing section. When you have checked all the possible causes listed and you are still experiencing the problem, see your John Deere distributor. Excessive load on hitch. As noted prior, nothing has been altered yet. In order to get to the pump you need to remove the rockshaft housing cover which is a lengthy process. John Deere 4640 John Deere 4840; Drive system: 4x2, 2WD (depending by model) 4x2, 2WD (depending by model) Additional: one wheel drive: one wheel drive: Permanent 4-wheel drive: n.d. n.d. Consult your John Deere dealer for this problem. but it will cost about $1600 or so for the pump the the add on hydraulic pump won't work out well. Hydraulic Pump Part Number R94660 is an Option, Must Also Order 1-5/8' Inlet Side Plug Part Number … I will also be replacing all fluids and filters before spring, and the pickup screen WILL be looked at and cleaned. "@id": "https://www.yesterdaystractors.com/" If the oil viscosity is not correct, the oil and oil filter may need to be replaced. I have not seen anyone who has utilized one of these pto driven hydraulic power units nor do I have any feedback, positive or negative, other than what Tim S has mentioned. When the oil returns from the planter. If there is no hydraulic system pressure, the hydraulic pump could be worn. The 4640 was equipped with either the stock 50 cm3 pump rated at 30gpm at redline or the optional 65 cm3 pump rated for 40gpm at redline. John Deere and its logos are the registered trademarks of the John Deere Corporation. This gives flexibility in selecting the level of subscription that matches the operators’ needs year by year. Equipped with multiple rear hydraulic remotes, Has a motor problem....we could not get it to start, starter just clicks... Sells absolute to the highest bidder regardless of price. Monday, March 18, 2013. Male tip failures could include internal poppet/ball stop being damaged or has moved out of position. All of our new, rebuilt, and used parts come with a 1 year warranty. Currently NOT using the hydraulic drive for the population, so nothing has been altered. The type III/IIIN 3-point hitch is very reliable, capable to lift 7328 lbs [3323 kg]. As TimS stated. I was told there was some sort of screen in the 3 cubic inch pump, and that if I went to the 4 cubic inch pump, this would no longer be the case. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 1978 to 1982. If bushings are needed, order R45822 … I responded in a prior message, B & D, and I pasted your message in that response so I could address your points and questions directly in the text. After the rear end was gutted and rebuilt, it was not one bit better than before. 5'th gear has plenty of power and i … The type III/IIIN 3-point hitch is very reliable, capable to lift 7328 lbs [3323 kg]. All of our new, rebuilt, and used parts come with a 1 year warranty. I am struggling with this issue because I tend to believe the main hydraulic pump is not putting out what it should. I have not seen anyone who has utilized one of these pto driven hydraulic power units nor do I have any feedback, positive or negative, other than what Tim S has mentioned. It seems that most modern equipment is requiring a much larger Hydraulic flow, and of course wider equipment has more cylinders to fill each time they are lifted then toss in a couple hydraulic motors to spin air systems and there you are needing a new tractor,,,sounds sorta like a marketing plan for the dealers...along with the new guidance systems luring customers in. Look for oil flying around there , on the bottom of the rockshaft there's a cover that can blow the gasket thus dumping return oil into the sump, causing low oil flow . Odds are it would be cheaper as well. My question has 2 parts. It seems that most modern equipment is requiring a much larger Hydraulic flow, and of course wider equipment has more cylinders to fill each time they are lifted then toss in a couple hydraulic motors to spin air systems and there you are needing a new tractor,,,sounds sorta like a marketing plan for the dealers...along with the new guidance systems luring customers in. Damaged pump drive. Returning the oil direct to sump will bog a Dubuque , Mannheim or Waterloo closed center system . It is important to note that John Deere Rate Controller 2000 can control up to five operations and may be used for liquid or … Using Troubleshooting Chart If you are experiencing a problem that is not listed in this chart, see your John Deere distributor for service. Around this area those that tried the variable rate drives were disappointed and went away from them, it's an intriguing idea that can give a lot of grief. I would think you could get a direct drive PTO pump from someplace such as Surplus Center for a lot less than the price you quoted. "width": 200, Aren't these volumes cited too low? But the fact is a pre-1996 tractors have trouble meeting the demands of some newer equipment. I have a problem on a John Deere 4640 tractor's steering.After struggling for a month now.. "image": { I have been looking at this from the standpoint that if my main hydraulic pump is weak and needs replacement, I might be able to solve this problem with a larger main pump. … The hydraulic functions in lifting the planter and raising the hydraulic markers were noticeably slower on this 4640 as compared to the 4630. Backhoe Dipperstick Will Not Rise Or Rise Slowly Dipperstick and bucket overloaded. john deere model: 4640 & 4840 chassis only volume 1 of 3 this is a manual produced by jensales inc. without the authorization of john deere or it's successors. If the valve is fine plumb a flow meter directly onto the output of the pump to see if the pump is pumping anything. Feel free to call with any further questions. This pump is 26 gpm. Standby pressure was at 2000 psi and was turned up to 2300 psi. I seem to recall seeing something about rated hydraulic flow on a 4640 being around 20 gpm, but I do not recall any more information on that. We went with ground driven finger pick up units on the last couple Deere planters, feeling the consistency of that system made a better stand, this can be argued in both directions but it's what works good for us, One thing not mentioned is that under continuous hydraulic function use the transmission/charge pump is the limiting factor. John Deere Tractor Parts 4640 - Hydraulics. When I talked about this to the representative at Worthington Ag Parts, we discussed the possibility of going to the larger main pump. If the flow was measured between the pump and junction block, you may be losing flow through the steering, brakes, or rockshaft. Transaxle . If the screen is clean as was the case on a tractor I recently did, then you have to tear into the rear of the tractor. See your John Deere Dealer. Where and how is it ported back into the tractor? Radiator replaces AR79456, AR90741. Low relief valve pressure. When the oil returns from the planter. See your John Deere Dealer. I have a problem on a John Deere 4640 tractor's steering.After struggling for a month now.. There is a wee screen up at the front pump I'll bet the dealership missed. Mike Why not add a PTO pump for some of the functions and take the load off your main pump? As TimS stated. "@id":"https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=jd&th=527293", According to the 4640 parts catalog the larger cap hyd pump was only offered from factory on a HFWD model. Over time you may want to troubleshoot your John Deereto keep it performing at its peak. Mike I have looked into one of those pto driven hydraulic power units. Your couplers and hose tips can also restrict flow. "publisher": { We will perform a total change out of hydraulic fluids and filter(s) before we hit the field in the spring AND pull the screen, too. I am basing that on what was written in the narrative of the work done on the tractor. but it will cost about $1600 or so for the pump the the add on hydraulic pump won't work out well. I think it could be done, reservoir and all, for $1000 or less. Both pumps are single bank 2000 series units. ** THIS ITEM IS SHIPPED TRUCK FREIGHT ONLY. Hy-Capacity was founded in 1978 as a remanufacturer of agricultural clutches, water pumps and torque amplifiers ().Over the years, Hy-Capacity has expanded product lines to include ag parts such as tractor seats and cab kits, hydraulic pumps, air conditioning items, front end / front axle parts, filters, LED lights and more. John Deere 4640 Hydraulic System Parts | Hydraulic Pumps | AR90959Marked R53157 or R52226.. $948.26 Add to Cart. The John Deere 4640 uses a set of differential hydraulic wet disc brakes to control it’s speed. If the flow was measured through an scv, not all the scv's may flow the same amount of oil regardless of where the rabbit/turtle is. Machine Creeps Forward … Skip to Content. Don't have the tractor sitting in a convenient location, and I cannot recall for sure, but with its Quad Range, isn't it just one filter? 2.4, 3, and 4 cubic inches per revolution. The higher flow ISO fittings and ensure the return oil is being returned to the pump side of the transmission oil filter. They both were used on a prior planter, a 7100 John Deere. "text": "I have a 1979 4640 that I use for various tasks which includes planting. 'Our inventory of JD 4640 tractor parts is always changing. When I talked about this to the representative at Worthington Ag Parts, we discussed the possibility of going to the larger main pump. It raises and lowers the planter and hydraulic markers slower than what I would expect it to do, even when I am not using the liquid starter when planting soybeans. I have quite a bit to think about. but it will cost about $1600 or so for the pump the the add on hydraulic pump won't work out well. Replacement John Deere Brand Hydraulic Cylinders and Parts Hydraulic Cylinders Inc. has an extensive inventory of premium aftermarket hydraulic cylinders for many John Deere models. 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