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M38 Cuno filter leaks
Posted: Tue Jul 17, 2012 1:06 pm
by Rotorhead
I have the original style Cuno oil filter - unfortunately it's leaking from the T handle on top and at the bowl gasket. I could make a new gasket, but am wondering if there are any new ones being sold out there?? And as far as the T handle goes, can it be repaired or do I need a new head?? I've opened it up to clean it and it looks like the head assembly (with discs) is riveted together? Maybe I'm missing something. I don't want to remove the filter and install a modern throw-away style - but that may be the best option. Suggestions?
Posted: Tue Jul 17, 2012 3:58 pm
by dayboy42
Take a look around ebay... their are typically NOS cuno oil filter assemblies for sale cheap because most people want the canister style instead.
Any of the jeep suppliers have them like Army Jeep Parts or Midwest for cheap money.
good luck!
Posted: Tue Jul 17, 2012 11:14 pm
by wesk
The Cuno filter has been with us since the 1920's. It is still installed as new equipment on OEM installation of a lot of hydraulic equipment. They are good filters and do a good job. Just as good as the military junior partial flow cannister system. You should be driving the jeep at least once a week unless it is in long term storage and pickled. You rotate the handle 360 deg once each week.
The bowl gasket can be tricky if you don't understand how it fits the lid.
The gasket (4) fits in the groove in the head (1) and the bowl (2) must have it's curved upper edge centered on the gasket. The backup plate (3) has enough give to let the bowl shift sideways enough for the lip of the bowl to get wedged under the metal edge of the head (1).
Also that nut on top under the "T" handle is called a packing nut and you must tighten it a little now and then to squash the seal enough to seal the stem of the "T" handle.
This is the gasket drawing.
M38 Cuno Filter
Posted: Sun Jul 29, 2012 7:48 pm
by Rotorhead
Thank you much! I'll fiddle with it tomorrow and see if I can get it right. Any idea whom might sell the gaskets??
Posted: Sun Jul 29, 2012 8:36 pm
by wesk
Midwest Military sold the head assy's. They may have the gaskets.
5330-00-351-4185 GASKET Index 5330-00-351-4188 GASKET
National Stock Number:
5330-00-351-4187
Federal Supply Class:
5330
National Item Identification Number:
003514187
Description:
GASKET
Detail:
A deformable material which prevents the passage of matter through the joint formed when two faces are joined. It may be metallic or nonmetallic, lubricated or impregnated, solid or hollow cross section. It may be made to any predetermined dimension and shape. Excludes flat disks, items made of felt material and items having joints. For round metal and plastic items with an aperture and a solid rectangular cross section, see WASHER, FLAT; SHIM; BEARING, WASHER, THRUST; and SPACER RING. Excludes DISK, VALVE; SEAL, NONMETALLIC ANGLE; SEAL, NONMETALLIC CHANNEL; SEAL, NONMETALLIC SPECIAL SHAPED SECTION; SHIELDING GASKET, ELECTRONIC; and RING, SEALING JAR.
Manufacturer Information:
118291 24617 GENERAL MOTORS CORP
118291 34623 AM GENERAL LLC
118291 7X677 GENERAL MOTORS LLC DBA GENERAL MOTORS
19932 73165 FEDERAL-MOGUL CORP FEL-PRO GASKET DIV
28649 15472 3M PURIFICATION INC.
7375059 19207 U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
Techincal Specification:
MATERIAL DOCUMENT AND CLASSIFICATION IL-G-12803 +328148-4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
APERTURE DIAMETER 2.125 INCHES NOMINAL
STYLE DESIGNATOR CIRCULAR
MATERIAL PAPER OVERALL AND GLUE OVERALL
OUTSIDE DIAMETER 2.562 INCHES NOMINAL
CROSS-SECTIONAL THICKNESS 0.094 INCHES NOMINAL
CROSS-SECTIONAL SHAPE STYLE SOLID SINGLE OR COMPOSITION