Wisconsin Air Cooled TRA-10D Instruction Book And Parts List page 2

I M P O R T A N T
STARTING AND OPERATING OF NEW ENGINES
Careful breaking in of a new engine will greatly increase its life and result
in trouble-free operation. A factory test is not sufficient to establish the
polished bearing surfaces, which are so necessary to the proper perform-
ance and long life of an engine. Neither is there a quick way to force the
establishment of good bearing surfaces. These can only be obtained by
running a new engine carefully and under reduced speeds and loads for a
short time, as follows:
First, be sure the engine is filled to the proper level with a good quality
of engine oil , see "Grade of Oil" chart.
Before a new engine is put to its regular work, the engine should be oper-
ated at low idle speed (1000 to 1200 R.P.M.) for one half hour, without
load. The R.P.M. should then be increased to engine operating speed,
still without load, for an additional two hours.
If at all possible, operate the engine at light loads for a period totaling
about eight hours, before maximum load is applied. This will greatly in-
crease engine life.
The various bearing surfaces in a new engine have not been glazed, as
they will be with continued operation, and it is in this period of "running
in," that special care must be exercised, otherwise the highly desired glaze
will never be obtained. A new bearing surface that has once been
damaged by carelessness will be ruined forever.
THEREFORE READ INSTRUCTIONS CAREFULLY
A copy of this manual is sent out with each engine. All points of opera-
tion and maintenance have been covered as carefully as possible but if
further information is required, inquiries sent to the factory will receive
prompt attention.
When writing the factory ALWAYS GIVE THE MODEL AND SERIAL
NUMBER of engine referred to.
Extra copies of this manual are $1.00 each.
WISCONSIN MOTOR CORPORATION
MILWAUKEE, WISCONSIN 532466