Motor Adjustment; Saw Guide Bar And Saw Guard - BIRO 3334 Operating And Service Manual

C. MOTOR ADJUSTMENT
Starting with Serial Number 27958 three (3) phase Model 3334's will no longer be equipped with an adjustable
motor base plate, Part No. 16015-10 and 16015-11. The motor will be bolted to the bottom of the base structure and
V-belt tension adjusted utilizing shims.
This change has evolved as a result of the market demand for higher blade speeds. The revised mounting proce-
dure will insure a more rigid motor installation creating positive belt alignment and minimizing machine vibration.
The base bottom has been redesigned to accept the frame sizes of the current 3 phase motors. Units prior to Se-
rial Number 27958 can be retrofitted by ordering Part No. 16015-12 motor base plate and template (flat), and 36
pieces Part No. 324A motor shims.
ADJUSTMENTS
1. For tightening motor V-belt on rigid base plate, remove ap-
propriate quantity of shims (Part No. 324A) under the motor
until the desired total flex of the V-belt is approximately ½".
1. For tightening motor V-belt on old style floating adjustable
motor mounting plates (Part No. 16015-10 and 16015-11),
loosen the upper wing nuts (Part No. 16015-3).
loosen the bottom wing nuts (Part No. 16015-3) which are
located under the mounting plate. This enables the motor
mounting plate to drop to the desired belt tension.
Re-tighten the upper wing nuts evenly so that the motor
stays horizontal. Do not tighten belt to extremes. This will
cause undue pressure on and premature failure of the mo-
tor bearings.
D. SAW GUIDE BAR AND SAW GUARD
The factory recommends that when service is performed on any BIRO SAW the servicing agency be sure that the
BIRO SAW is equipped with the most current safety features available.
In September 1969 production of the Model 3334 began and is current. The Model 3334 was first equipped with
19" saw guide bar until March 1973 when the length was extended to 23". In June 1977, the bar was shortened to
22" and is used in current production.
The same saw guard (Part No. 255) on saw guide bar used on the Models 33 and 34 was carried over to the Model
3334 and used in production until June 1975.
Part No. 663 Saw Guard on saw guide bar replaced Part No. 255 in June 1976 starting with Serial No. 12242. At
the same time, the Part No. 661 Guard on head Door introduced in 1974 was replaced by Part No. 661-1 Guard on
Head Door. Both Part No. 663 and 661-1 are current production today.
The factory recommends that all Model 3334's prior to Serial No. 12242 be updated by installing the current SAW
GUIDE BAR ASSEMBLY (Part No. A116-22) and SAW GUARD ON HEAD DOOR (Part No. 661-1).
Then
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