D-15 power steering fluid
Printed From: Unofficial Allis
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=56738
Printed Date: 19 Jul 2025 at 4:15am
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Topic: D-15 power steering fluid
Posted By: Dave (Mid-MI)
Subject: D-15 power steering fluid
Date Posted: 12 Sep 2012 at 10:03am
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Can't find where I left my OM, and want to top off the fluid. What oil is called for in the operator's manual. Thanks.
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Replies:
Posted By: aras
Date Posted: 12 Sep 2012 at 12:36pm
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Hmm No reply yet... We put regular hydraulic fluid in our series I D17
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Posted By: GregLawlerMinn
Date Posted: 12 Sep 2012 at 3:17pm
I use universal trans hyd in mine
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What this country needs is more unemployed politicians-and lawyers.
Currently have: 1 D14 and a D15S2.
With new owners: 2Bs,9CAs,1WD,2 D12s,5D14s,3D15S2s, 2D17SIVs,D17D,1D19D;1 Unstyled WC
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Posted By: captaindana
Date Posted: 12 Sep 2012 at 7:25pm
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In my 15II I use red ATF!
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Posted By: DSeries4
Date Posted: 12 Sep 2012 at 9:06pm
ATF in mine too
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 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: DrAllis
Date Posted: 12 Sep 2012 at 9:26pm
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ATF or Dexron is what the owners manual recomends. Modern day universal hydraulic fluid is better and unfortunately they don't go out and re-write the owners manuals.
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Posted By: ctbowles58
Date Posted: 13 Sep 2012 at 8:47am
type F ATF
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190XT 2WD45 WF D15 D14 CA BIG10 302 & 303 bailers 77G rake 80R mower 6 plows and alot more
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Posted By: TimNearFortWorth
Date Posted: 13 Sep 2012 at 9:45am
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I use the Ford ATF as it meets the original spec called for. On each tractor I pick up, I get the PS good and warm and drain the bolster as you may be surprised at what comes out. One D15II looked like it had never been changed, was low enough to see the crescent gear pretty good, had a few line fittings leeking and did not steer near as easy as the other D-Series. Got her warm, dropped the fluid and honestly do not know how the pump handled the sludge like it did. With the drain plug out, poured 1/2 a qt. of ATF in her and still got crap out. Re-filled with new and dropped it again after a couple of hours of running so I could get what was originally in the pump/lines, plus what crud had settled on top of the gear. Much cleaner and that D15II steers easiest of any of the five D-Series I have with PS. Clean the breather cap as the dimples on the cap can completely plug of (that has the mesh inside), soak that in diesel or solvent to clean it and I do a final clean with gas and let dry overnight. Mine was also full of crud and the hex cap did not have the gasket.
Sandy Lake has the nylon gaskets and if memory serves, it is the same size as others used on the D15/D17.
If I can't see the gear through the fluid 1/4 - 1/2" above the gear, I change it and re-clean the breather cap. Those PS pumps will go a long time if you can keep em clean.
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