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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 Luber-Finer detailing test parameters for a model 300 oil filter.

Identifier  ExFiles\Box 135\3\  scan0287
Date  29th June 1938
  
TELEPHONE: ACOCKS GREEN 1681 (3 lines)
1139
TELEGRAMS: "COLSPAR," BIRMINGHAM
LUBER-FINER
LUBER-FINER (ENGLAND) LTD.
(ASSOCIATED WITH R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} COLLIER & CO. LTD.)

DIRECTORS: A.{Mr Adams} W. BLUNT
R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} COLLIER
H.{Arthur M. Hanbury - Head Complaints} E.{Mr Elliott - Chief Engineer} M.{Mr Moon / Mr Moore} PARK

COLLIER'S CORNER
SOUTH YARDLEY
BIRMINGHAM

June 29th. 1938.

Handwritten: Files
RHC{R. H. Coverley - Production Engineer}/FB

Your ref: Rm{William Robotham - Chief Engineer}3/R

Messrs. Rolls-Royce Ltd.
DERBY.

Handwritten: S.W.O.L. Should like to get a figure of merit for this filter. Rm{William Robotham - Chief Engineer}
For the attention of Mr. W. A.{Mr Adams} Robotham

Dear Sir,

Please accept my thanks for your letter of the 27th. instant. I am at once sending to you for test a model 300 Luber-Finer, together with a spare refill.

Would you please note that for test purposes the lubricant should be passed through the unit at a temperature ranging between 80°F and 160°F, as the element does not become fully activated unless the temperature is over the minimum figure stated above. The minimum pressure required to pass the lubricant through the pack is 20 lbs. per sq.inch. The release valve is set to blow at 40 lbs. per sq. inch, in other words, at anything over 40 lbs. a proportion of the oil in circuit will be bypassed straight back to the crankcase.

It is of course clear to you that the Luber-Finer is designed as a bypass filter, and should not be used in any other way.

I shall be most interested to hear in due course the results of your test.

Yours faithfully,

(Signature)
R.H. Collier
Director
LUBER-FINER (ENGLAND) LTD.

FOR
CARS
BUSES
LORRIES
TRACTORS
DIESELS
MARINE AND
STATIONARY
INTERNAL COMBUSTION ENGINES

A MINIATURE OIL REFINERY FOR ALL INTERNAL COMBUSTION ENGINES

Luber-finer
NEW OIL EVERY MILE - REFINES AS YOU DRIVE
  
  


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