PRE * PIANO BULLETIN NO. 1
DATE: Nov. 19, 1948
SUBJECT: Pedal rod adjustment and installation.
Prior to locking pedal rod to pedal as described in the
fifth step of the instruction for Pre*Piano assembly, the pedal
rod length must be adjusted.
For this purpose all new type pedal rods have a machine
screw threaded into the top. Driving the screw in shortens the
rod. Turning it out lengthens the rod.
Proper adjustment is found by inserting the screw end of
the pedal rod into holle X as shown in the assembly instrucions
until the screw contacts the damper release bar pivot arm.(This
arm has a spring action and therefore this contact can easily be
Now check the rod length. The
lower end of the wooden rod should be
flush with the top surface of the pedal
Adjust pedal rod screw and check
again. When you have established the
proper length, raise the rod carefully,
just far enough against the spring action
to permit dropping the pin into the
pedal heel hole. PUSHING THE ROD FURTHER
THAN NECESSARY MAY DAMAGE THE PIANO DAM-
Now check all dampers, first with
foot off the pedal. All dampers should
operate normally.(Note that 8 treble notes have no dampers.)Next
check with foot on pedal. No dampers should operate. Minor shortening
or lengthening respectively will correct any remaining discrepancies.
NOTE: Some older pedals do not have the machine screw. In this case
the rod may be shortened by cutting the upper end off (rasping, saw
etc.) Lengthening may be achieved by inserting a small nail (screw,
etc.)or send to the factory for a new type pedal rod.
U.S. PROPELLERS, Inc., Manufacturers
3270 E. Foothill Blvd.
Pasadena 8, Calif.