Air cleaner decals

[Mike Gurr]

The help available from this forum never fails to amaze me. Jordan, well spotted and many thanks. Ron - yes will do and Hanno, I don't know about standardisation as every Carrier seems to be slightly different. A friend of mine has a carrier same mark as mine and only 3 months apart from mine in build date but has various differences. His has a bypass oil filter which mine does not, each Carrier has different fire extinguisher brackets etc etc whether they started life the same and have had changes to some parts since is most likely or maybe the parts fitted did vary from month to month even when new. so far as anecdotal evidence has it the crankcase air filter has always been on my carrier but who knows as that 'evidence' certainly does not go back all the way to 1944. Variety is the spice of life!!

[Hanno Spoelstra]

Originally Posted by Mike Gurr

Variety is the spice of life!!

Indeed Mike, and that is what makes this hobby so interesting!

[Mike Gurr]

Absolutely. While waiting for the new decals to arrive does anyone have an original picture of the decal on the large air cleaner as I am not sure where it should be positioned?

[Lynn Eades]

Mike I have a united specialties breather that has two tags one from Ford of Canada and the other with a Ford part number. I assume United Specialties was a subsidiary of Ford? I don't know that these were supplied as a carrier part, but assume they were used "across the board" where an oil bath breather was specified. Nigel Watson's book talks about the alarmingly short engine life of Carrier engines in the desert and assume the oil baths were adopted then?
My Canadian Commercial parts book specifies "C11AS 6766 D Cap - oil bath breather assy (when Hydro vent specified) "Push in type". Fitted from 3/41. There was also a screw in type.

[Lynn Eades]

Sorry about the pictures. I don't know how to rotate them. Ron , you have the hydro vent, so in theory at least you should be running an oil bath breather.

[Ron Pier]

"Hydro vent" Is that what my standard oil filler cap is called Lynn? If one of the oil bath filters comes along I'll fit it, Ron

[Hanno Spoelstra]

Originally Posted by Lynn Eades

Mike I have a united specialties breather that has two tags one from Ford of Canada and the other with a Ford part number. I assume United Specialties was a subsidiary of Ford? I don't know that these were supplied as a carrier part, but assume they were used "across the board" where an oil bath breather was specified. Nigel Watson's book talks about the alarmingly short engine life of Carrier engines in the desert and assume the oil baths were adopted then?
My Canadian Commercial parts book specifies "C11AS 6766 D Cap - oil bath breather assy (when Hydro vent specified) "Push in type". Fitted from 3/41. There was also a screw in type.

Lynn, Tony answered most of your questions here: http://www.mapleleafup.net/forums/sh...688#post123688

[Lynn Eades]

Ron, the pre 42 engine had a crankcase breather system where air was drawn in via the oil filler cap (as per your engine filler cap) This was drawn in because the sump had a vent at the r.h. front of the sump, that was affected by the air flow past it (in the draught under the engine in a car or truck) (In other makes, called a draught tube) In your engine there is no vent. However your engine has the hydrovent system which has a thin sandwich plate between the carb base and the valve cover (inlet manifold) This has connected to it by way of various fittings, a PCV valve which is in turn connected to a tapping at the front right side of the inlet manifold (under the generator). In this system a negative flow is drawn in via the oil bath oil filler. This negative pressure is generated from engine vacuum (under closed throttle) and in turn draws throught the PCV valve (I see it, in your engine photo) and in turn through the pipe running forward to the front of the manifold. The early system doesn't work in a carrier with no draught past the sump vent. I hope this all make sense?

[Ron Pier]

Thanks for the concise explanation Lynn. I'll take a closer look next time I get the covers off. I'd like to find one of those filters some time.

Cheers Ron

[Jacques Reed]

Originally Posted by Mike Gurr

Absolutely. While waiting for the new decals to arrive does anyone have an original picture of the decal on the large air cleaner as I am not sure where it should be positioned?

Hi Mike,

Not sure if carrier and Ford CMP trucks used the same decal but here is an original air filter decal on a NOS CMP truck carburettor air cleaner, the large "Honeypot" type.

The gold background is different to most aftermarket air cleaner decals which are yellow, as is "Made in Canada". Most ones have "Made in USA" for the US market. That is the type I used on the restored CMP air cleaner shown.

I made the artwork for the Canadian version but getting gold decal paper is costly. Likewise getting permission to use the "Ford" logo opens up legal issues I am not willing to pursue so I shelved the idea of making them.

Cheers,

[Lynn Eades]

Back to you Ron. Here are the Hydro Vent bits.
So the inlet manifold changed, The sump changed, and also the rear main seal changed (from a slinger to a seal)

Guys, what do I do to fix these pictures taken on my Android phone? Rotating them on my computer makes no difference. Is it the way I orientate my ph. when taking the photo?

[Jacques Reed]

Hi Ron,

As Lynn mentioned there were two types of sumps: those with a road draft tube and those without.

Keith Webb posted a while back on Canadian Military Vehicles Facebook page, a WW2 D.M.E Technical Instruction regarding the fitting of the Hydrovent. Perhaps he can reproduce it here too if he reads this. Hydrovent was a name used by Fram for the PCV system.

It mentioned those sumps fitted with a road draft tube and the Hydrovent need to have the tube blocked off with a thin shim for the system to function properly.

I have two 1946 engines with road draft tubes, but I am running the Hydrovent on one of them, so I fabricated a block-off shim as per the Instruction. Even those two sumps are different. One has a smaller drain plug and one piece (car?). The other has a larger plug and a removable lower section at the flywheel (truck?) which is the one that I am using on my truck.

Hope this is of some interest.

Cheers,

[Ron Pier]

Thanks Lynn and Jacques for your explanation and pictures of the hydrovent system.

Lynn I receive pictures all the time from guys using their phone album which are often sideways or upside down??

Jacques the filter decal that Mike and I are fitting is for the large air filter bolted to the rear wall of the carriers. Since I think the filter can be revolved within its brackets! I'm guessing anywhere between the brackets??

Cheers Ron