Oil cooler hose/lines

78jotadave

78jotadave

Hero member
Location
Palm Desert, California. (near Palm Springs)
So after 36+ years of trouble-free use, one of the aftermarket braided SS oil cooler lines has a leak (see attached picture). Once the RPM reaches 2500 oil flow pours out of the connection where the curved tube connects to the braided hose. I originally bought these from Lance Weill aka 'Rickey Racer Laverda', Lance had a few sets made for his many projects. Does anyone have a source for a similar replacement?
 

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You can unscrew those unions and replace the hose alone. Clamp the elbow in a vice and unscrew the hex part, the hose comes off with it. Generic 8mm/ 5/16" rubber oil hose fits nicely. I've used a Gates product, has held up fine for the past 12 years or so.

I avoid braided/sheathed stuff because ageing and/or damage isn't instantly visible.

piet
 
If that hose is a crimp fit you could try a farm supply store [if they make hydraulic hoses], or a construction equipment dealer. They usually make and crimp lines as they lead a tough life on equipment. OR a good speed shop could sell you the fittings and hose to make your own.
 
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Is that oil out, through a rad, flowing to the Cylinder Head or to the Crank Mains ?

The Cylinder Head only has about 3 psi whereas the Mains can have as high as 60 psi on a cold start with Babbitt main bearings.

I'm a 750 SF Twin guy - You got me curious - What oil circuit is the Rad on - Heads or Main Journals and where does it drain - Into the sump oil pan ?

As far as I know Breganzies have either Ball Bearing or Needle Bearings on the Main which requires Hi-Flow with not much more 5 psi pressure.

See that Brass Plug tapped into the Upper Cylinder Oil Gallery - It has it uses on a Breganzie 750:
3674452166_f265d3d862_o.jpg

Correct me if I'm wrong but really can NOT see why expensive Hi-Pressure Hoses are required for an inline Oil Cooler on a Breganzie other then just using a Hydraulic Hose with C-Clamps !

I would consider MAX Flow NOT the Pressure to include the In Line Rad and Hose Diameter for cooling the Oil as if it's really necessary. The more free flowing the oil rad, bigger the engine oil gallery tap and hose diameter is Best as the oil pressure doesen't go over 5 PSI.

As far a them external oil fitting failing, I've had better luck just using larger hydraulic dia hoses and clamps compared to them expensive small diameter swivel stainless braided hoses that will fail due to the enherient vibration of a Breganzie.
 
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High pressure hose isn't required, as long as you don't have a serious restriction somewhere in the system. But then, you've got other problems. Imho, braided oil hoses look somewhat tacky, they lack the style these bikes usually show.

Laverda used several different hose designs over the years, those pictured by jotadave are not crimped. Their design is very similar to that horrible looking blue and red Aeroquip stuff. Later models such as the SFC1000 or OR600 had crimped oil lines.

piet
 
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PIET: Glad we agree about things at times - Performance is NOT always about BLING.

Say 3/8th to 9/16th engine tap and hose with a rugged free flowing rad - If you really think you need it.

You can always put a Low Pressure Gauge in the engine oil line tap to ensure oil is getting to the Top End but not ensured - I don't want go there now ;o).
 
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So I got my oil cooler lines expertly sorted at a local 'Hose and Couplings' shop. They used the existing "BLING" fittings and cleaned them up a bit, one day turn around and $55 bucks out the door, I am very happy. I hope to get another 30+ years outta this bit of "BLING". The ceramic coated exhaust headers and exhaust ring are more "BLING" with a purpose.😊
 

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78jotadave said:
So I got my oil cooler lines expertly sorted at a local 'Hose and Couplings' shop. They used the existing "BLING" fittings and cleaned them up a bit, one day turn around and $55 bucks out the door, I am very happy. I hope to get another 30+ years outta this bit of "BLING". The ceramic coated exhaust headers and exhaust ring are more "BLING" with a purpose.😊
Click to expand...
A true bling mobile :)
 
sfcpiet said:
High pressure hose isn't required, as long as you don't have a serious restriction somewhere in the system. But then, you've got other problems. Imho, braided oil hoses look somewhat tacky, they lack the style these bikes usually show.

Laverda used several different hose designs over the years, those pictured by jotadave are not crimped. Their design is very similar to that horrible looking blue and red Aeroquip stuff. Later models such as the SFC1000 or OR600 had crimped oil lines.

piet
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Couldn't agree more on the blue & red anodized fittings!
 
sfcpiet said:
You can unscrew those unions and replace the hose alone. Clamp the elbow in a vice and unscrew the hex part, the hose comes off with it. Generic 8mm/ 5/16" rubber oil hose fits nicely.
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... unscrew those unions! Is that true? If so, a great bit of info. seeing as I was considering mounting a deeper oil cooler to the 1200 and would need new hoses. I'll give it a try (when it's not freezing in the garage.)
 
1200 JOTA said:
... unscrew those unions! Is that true? If so, a great bit of info. seeing as I was considering mounting a deeper oil cooler to the 1200 and would need new hoses. I'll give it a try (when it's not freezing in the garage.)
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Of course it's true. I'll dig out a disassembled one and post a pic tonight.

I've been having them re-plated for ages, only problem is the nut on the cooler. The olive on the cooler tube needs to be cut to get it off.

piet
 
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