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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter from R.H. Collier & Co. Ltd. regarding test results and issues with a Luber-Finer oil filter unit.

Identifier  ExFiles\Box 135\3\  scan0242
Date  4th March 1938
  
Files 1139

TELEPHONE: ACOCKS GREEN 1681 (4 LINES) TELEGRAMS: COLSPAR BIRMINGHAM

R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} COLLIER & CO. LTD.

SUCCESSORS TO
SWIFT OF COVENTRY LTD HALLEY MOTORS LTD AND
THE CLYNO ENGINEERING CO (1922) LTD.

THE SPARES SPECIALISTS

MANUFACTURERS OF SPARE PARTS FOR MANCHESTER A.J.S SWIFT & CLYNO VEHICLES

SPARE PARTS FOR WILLYS OVERLAND & WILLYS KNIGHT

SPECIALISTS IN CYLINDER GRINDING LINING & REBORING GEAR CUTTING STARTER RING SERVICE

MOTOR & GENERAL ENGINEERS

DIRECTORS: R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} COLLIER, M.I.A.E., F.I.M.T. R.{Sir Henry Royce} W. SILVESTER. W. J.{Mr Johnson W.M.} WRIGHT.

COLLIER'S CORNER
SOUTH YARDLEY
BIRMINGHAM

OUR REF
RHC{R. H. Coverley - Production Engineer}/FB

YOUR REF

DATE
4/3/38

L. Swindall Esq.,
Experimental Department,
Rolls-Royce Ltd.,
DERBY.

Dear Sir,

I am sorry I have not written to you before regarding the Luber-Finer which you had on test, but I have been waiting for a report from the European Representative but owing to his absence on the Continent I have been unable to make contact with him before.

There are one or two points which arise. If you fitted it on a standard engine, the model 185 Luber-Finer which we sent to you is not big enough to take care of the load, and the larger unit, i.e. Model 299, should be fitted.

Secondly, when this unit was opened the outside of the pack and the actual walls of the inside of the Luber-Finer had clean oil on them; the bottom of the Luber-Finer for about ½" was well filled with dirty oil, or we might say sludge.

The pack was cut in half, and on pressing out the filter element this was found to be full of clean oil. The distributor in the centre of the pack was also full of clean oil, which shows two things:

(1) The Luber-Finer was on the wrong hook-up, i.e. it would appear as if it had been connected up the wrong way round:

(2) The Luber-Finer was not large enough to take care of the volume of oil or the pressure that was forced through it, and merely circulated round the pack and out through the relief valve again, with just a small amount of the oil going through the pack.

I should like to point out that this is essentially a bye-pass filter. The pressure under which it should work should be from 20 to 30 lbs. and it is also essential that it should work under the same conditions as when fitted to a vehicle, as it does not seriously operate until a temperature of 80°F is reached and it works at its best at anything between that temperature and 160°F.{Mr Friese}

Continued......
  
  


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