Farm Equipment - 175 "making" oil

Print Page | Close Window

175 "making" oil

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=188383
Printed Date: 10 Apr 2026 at 7:08pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 175 "making" oil

Posted By: DSeries4
Subject: 175 "making" oil
Date Posted: 21 May 2022 at 9:34pm

I checked the oil in the 175 today and it was over the full mark a fair bit. It does not get used very much. It does smell like diesel.

I put a new mechanical lift pump on it when I restored it in 2015. I did put a rebuild lit in it about 3 years ago. Tractor runs beautifully, never had any problems with the CAV injection pump. I am thinking of putting on a new lift pump, but is there anything else that could be causing diesel to get into the oil?

Many thanks!

-------------
'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

Replies:

Posted By: Tom59
Date Posted: 21 May 2022 at 10:19pm

I bet the seal out on the front of the injection pump where it bolts on at the front of the engine. I had a MF275 tractor do same thing with a CAV injection pump and a pump rebuild solved the problem.

Posted By: nickia
Date Posted: 21 May 2022 at 10:20pm

If that tractor has the perkens engine my brothers leaked fuel into the crankcase on the back side of the fuel pump

Posted By: Gary Burnett
Date Posted: 22 May 2022 at 6:04am

i'd be looking at the lift pump.

Posted By: sparky
Date Posted: 22 May 2022 at 1:21pm

Yep a complete pump rebuild and injectors also. Just did my 175 a few months ago. Another reason to pull the dipstick every time before use.

-------------
It's the color tractor my grandpa had!

Posted By: KJCHRIS
Date Posted: 22 May 2022 at 7:51pm

2 places I can think of: lift pump or injection pump shaft seal.

-------------
AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B,