Ca hydraulic filter possible?
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=170194
Printed Date: 22 Aug 2025 at 10:41am
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Topic: Ca hydraulic filter possible?
Posted By: Hunt4Allis
Subject: Ca hydraulic filter possible?
Date Posted: 16 Apr 2020 at 6:01pm
So as I'm reading other threads about different tractors and loaders (d-17 with 500 series loader) I'm starting to see that a filter is possible in these scenarios and got me to wondering does my CA or d-17 have any kind of filter for the transmission or hydraulic fluid?
Should there be a filter on implements main line attachment point to the tractor to eliminate contamination from implements to hydraulic pump?
Thanks Matt
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Replies:
Posted By: CTuckerNWIL
Date Posted: 16 Apr 2020 at 7:44pm
Ya can't have a filter on a pressure line. It would have to be on the intake side of the pump, or on a return line to the reservoir.
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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Posted By: steve(ill)
Date Posted: 16 Apr 2020 at 7:46pm
I would not worry about it... Keep the tractor under cover so rain does not run down the shift lever into the case, etc... Then change the oil every 5 years if you think it needs it.
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Like them all, but love the "B"s.
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Posted By: Hunt4Allis
Date Posted: 16 Apr 2020 at 8:08pm
Steve,
I'm more concerned with the implements oil leftover in lines and cylinders that are really old and unknown contaminating my newly cleaned and rebuilt hydraulic pump/ trans oil.
I'm tempted to replace all lines and flush cylinders out on trip loader front loader bucket...
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Posted By: DSeries4
Date Posted: 16 Apr 2020 at 8:40pm
Only Series 3 and 4 D17s had a hydraulic oil filter.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Posted By: MACK
Date Posted: 16 Apr 2020 at 9:03pm
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There are hi pressure filters that can be used on pressure side, but on your CA, you have oil flow both direction. Any thing caught going out could be flushed back into pump when cylinder is retracted. MACK
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Posted By: Dakota Dave
Date Posted: 16 Apr 2020 at 9:24pm
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A hyd filter in in the intake line of the pump. Your intake line is attached to the back of your pump. It goes straight down into the differential sump. Your hydraulic system is a simple one way with no circulating fluid. A pressure filter is only used in a system with circulating fluid. Yours fluid goes from the pump into the ram. Gravity pushes it back. Thru the same line.
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