March 16, 1959
Bulletin No. 701
Subject: 27-148 Connecting rod needle bearings QD series motors.
If you have recently received any quantities
of 27-148 needle bearings from your parts
distributor, no doubt you have noticed that
they are strip packed in soluble wax,
quantities of 29 per strip. (As pictured)
The needle bearings are packaged in this
manner, by the vendor through our request,
for our use on the assembly line. The
bearings are securely held in strips by
soluble wax, and greatly facilitates easier
motor assembly. The bearings being held in
this manner will also reduce the possibilities
of any of the needles dropping out during
assembly, which can cause extensive damage.
To facilitate handling by your parts dis-
tributor, it is suggested that you order
these needles in multiples of 29, so that
it will not be necessary to break up the
packaged strips.
When replacing needle bearings in all model motors, for best results always
replace complete sets. This insures a uniform load on all needles. A comb-
ination of old worn needles and a few new needles, will result in high loads
on the new needle which will have a fractional larger O.D. This could result
in premature failure. The few cents difference in cost to replace all the
needles in a set, is not worth the possibility of a powerhead failure.
JOHNSON MOTORS
Jack Penland
Jack Penland
Service Department
JP:eb