Farm Equipment - D 15 II oil filter

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D 15 II oil filter

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=139290
Printed Date: 29 Dec 2025 at 8:32am
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Topic: D 15 II oil filter

Posted By: Dave H
Subject: D 15 II oil filter
Date Posted: 10 Jun 2017 at 8:56pm

I installed a Fram PH 8a oil filter on the tractor when finishing restoration.

It appears to me that the filter drains back into the crankcase after shut down. Then it has to refill upon restart before the system is pressurized.

Is that the way they are supposed to be or is there an issue with the correct filter or some other leak down issue?

thanx

Replies:

Posted By: DSeries4
Date Posted: 11 Jun 2017 at 9:16am

That is the nature of the beast. I have always used the PH8A on my D15. No problems so far.

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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

Posted By: DougS
Date Posted: 11 Jun 2017 at 9:30am

Some filters have better anti drainback valves than others. Switch to a Purolator and see if the problem goes away.

Posted By: Dave H
Date Posted: 11 Jun 2017 at 4:37pm

thanks guys, you put me at ease on that issue.