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mogle 
Bronze Level
Joined: 07 Apr 2012
Location: missouri
Points: 31
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 Topic: 7040
Posted: 07 Apr 2012 at 9:35pm |
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does any one know how to get to the scavenger pump on a 7040
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MACK
Orange Level
Joined: 17 Nov 2009
Points: 7664
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Posted: 07 Apr 2012 at 10:08pm |
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If it has one, take the plate off bottom of torque tube just behind engine. MACK
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DrAllis
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Joined: 12 Sep 2009
Points: 21847
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Posted: 08 Apr 2012 at 5:34am |
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Why do you think you need to get at the scavenger pump??
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mogle
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Location: missouri
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Posted: 08 Apr 2012 at 1:27pm |
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found alot of metal in the oil and has a lot of noise somewere in the hydrolics and cheacking to make sure all of the four pumps are good
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DrAllis
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Posted: 08 Apr 2012 at 3:16pm |
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A lot of metal in the rearend/hydraulic oil ???? or transmision oil??? where did you find the metal??
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mogle
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Posted: 10 Apr 2012 at 11:39am |
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DrAllis
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Posted: 10 Apr 2012 at 6:43pm |
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The hydraulic oil comes from the rearend. The Scavenge pump is in the front of the transmission.
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mogle
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Location: missouri
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Posted: 11 Apr 2012 at 12:41pm |
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yes but all of the oil is shared
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Orange Blood
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Joined: 29 Nov 2010
Location: ColoradoSprings
Points: 4053
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Posted: 11 Apr 2012 at 2:22pm |
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Actually Mogle, I am fairly certain that is not correct. There is a trans dipstick in the front, in the cab, and a rear end sight gauge on the back left, and two different filters, and two different fill points. I would have to go pull my hydraulic flow charts, but I think the scavenger pump charges the two pumps most rearward, and the front pump is the hydraulic pump, and only the hydraulic pump pulls from the rear, but again I have to get out the books
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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7
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Jordan(OH)
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Joined: 11 Sep 2009
Location: Celina, OH
Points: 1563
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Posted: 11 Apr 2012 at 4:28pm |
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Oil is NOT shared!
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Mike Kroupa
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Joined: 02 Oct 2009
Location: pierce, ne
Points: 337
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Posted: 11 Apr 2012 at 7:34pm |
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Scavenger pump was used to return "scavenge" oil from power director clutches to the trans. housing. It was eliminated with the black belly pd tractors in favor of a gravity return system, I think early models could be updated. The gear pump charged the axial piston hyd. pump. hth, Mike
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mogle
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Location: missouri
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Posted: 12 Apr 2012 at 6:57pm |
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o well it just seemed that it is shared because a pip comes from the gear geroter pump to were the scavenger pump is but yoo maybe right
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