7850 filter ID
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=200234
Printed Date: 08 May 2024 at 2:24pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 7850 filter ID
Posted By: powertech84
Subject: 7850 filter ID
Date Posted: 10 Mar 2024 at 6:59pm
Can anyone tell me what this filter is on the left side frame rail?the hose seems to go up to the engine block behind the starter so I'm thinking it's oil, not fuel. I can't find it in the parts breakdown. I was thinking bypass oil, but it looks completely different than what isbin the parts diagram. Was there a change? 
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Replies:
Posted By: victoryallis
Date Posted: 10 Mar 2024 at 7:08pm
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Looks like something someone cobbled in. Granted my 7580 has a repower but it doesn’t have a filter outside the frame rails. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: powertech84
Date Posted: 10 Mar 2024 at 7:31pm
| It has this on the left, and also a water separator and electric fuel pump outside the frame rail on the opposite side. Kinda weird because according to the serial, 2434, I don't believe it should have had an electrical fuel pump. Both filters look factory and not all that cobbled. |
Posted By: MikeKroupa
Date Posted: 10 Mar 2024 at 8:02pm
| The filter on the frame rail is the by-pass or secondary oil filter. It replaced the luber-finer canister that was located in the open behind the engine. Although a very good design, they were sometimes problematic and prone to leaks if not assembled properly. Allis then installed and updated units to this spin -on type and actually the filter is not a by-pass type, but a full-flow filter, 3306 CAT if I'm remembering correctly. It serves the purpose well though and oil flow is restricted by the orfice coming off the oil cooler. It was meant to mounted above the starter. The small filter above it is the coolant conditioner filter. ,HTH, Mike |
Posted By: powertech84
Date Posted: 10 Mar 2024 at 8:10pm
| Thanks Mike. You wouldn't happen to know the part number for the spin on filter would you? I need to get the tractor trucked home first, but my first task will be to change all the fluids and filters. |
Posted By: MikeKroupa
Date Posted: 10 Mar 2024 at 8:19pm
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1791 NAPA, lube filter, Your welcome and good luck! |
Posted By: 55allis
Date Posted: 10 Mar 2024 at 9:20pm
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How long has it been sitting? Looks like it’s been while… ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: powertech84
Date Posted: 10 Mar 2024 at 9:47pm
| I was told from the guy that I purchased it from that he bought it 2 years ago. It ran and drove off the trailer to where it currently sits. No idea where it originally came from or how long it had been there, but it appears to have been a number of years. |
Posted By: 55allis
Date Posted: 10 Mar 2024 at 10:42pm
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Love it when people save those big 4x4s from scrap!!! I wish to own one eventually but time and money talks first… Good luck!!! ------------- 1955 AC WD45 diesel with D262 repower, 1949 AC WD45 |
Posted By: Unit3
Date Posted: 10 Mar 2024 at 11:22pm
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I too would say an engine bypass filter. I would also add it was put in a very dangerous place. Dirt and mud are going to be constantly hitting it as well as the oil lines. The correct place for that is up in between the starter and that water filter. The first bypass filters were up behind the engine, and under an orange hood that was held down with two springs one on each side. They had a seal that would go bad and dump all the oil out on the ground under pressure. The spin on bypass was a much needed changeover. ------------- 2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C |