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| John Deere Tractors Discussion Forum |
Topic: Please Help Identify 4020 Part (Picture Attached)
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| ih555
12-30-2012 19:57:55
76.77.197.94
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 I have two 4020s, one is a synchro, one a powershift. The synchro has this 4 1/2 inch wide tank hooked onto the transmission oil cooler in front of the radiator. The powershift does not have this tank. I'm unsure what this tank is used for. The left side air filter is removed in this picture. Thank you for your help!
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| Bob
12-30-2012 20:46:44
64.255.159.192
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Re: Please Help Identify 4020 Part (Picture Attached) in reply to ih555, 12-30-2012 19:57:55
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| | The hydraulic reservoir tank is used on the synchro shift tractors to hold a supply of oil in reserve for the main hydraulic pump in addition to the oil contained in the oil cooler, especially when the foot clutch is depressed and the transmission pump (that supplies oil to the main hydraulic pump)is NOT operating. The transmission pump operates continuously on the hydro tractors, even when the "clutch" is depressed, so the added oil reserve capacity of the reservoir tank isn"t needed. Clear as mud?
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| Bob
12-30-2012 20:52:23
64.255.159.192
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Re: Please Help Identify 4020 Part (Picture Attached) in reply to Bob, 12-30-2012 20:46:44
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| Well, it's certainly clear as mud I type too slowly!
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| M w J
12-30-2012 20:38:46
66.6.13.78
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Re: Please Help Identify 4020 Part (Picture Attached) in reply to ih555, 12-30-2012 19:57:55
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| On the syncro when the clutch is pushed down the transmission pump stops pumping with that tank you would still have power steering and hydraulics for a limited time without that tank you wouldn't Powershift the transmission pump still pumps with the pedal down
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| Dalet
12-30-2012 20:17:55
184.94.141.146
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Re: Please Help Identify 4020 Part (Picture Attached) in reply to ih555, 12-30-2012 19:57:55
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| I think it is to keep the hydraulic fluid warm since the synchro range won't warm it up very much most of the time.
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