Hello Tom & Don,
I'm not totally in agreement with Don K9YLI idea to replace the Aluminum Pins with Steel Woodwork Finishing Nails on either the Plastic or Nylon Isolation Coupling Shaft Assembly.
Suppose you decide that Don's idea is the best solution and some time in your future the shaft jams or siezes and the Steel pins are unable to shear or break. The motor torque or mechanical pressure needs to be disappated in one method or another, which sets up a worse case scenario by stripping the internal worm and motor gear, if not damaging the small Yaseu motor(s) themselves. One other item to consider, the FC-757 AT Tuner was desugned and developed in the 1980s and
99% of OEM manufactrures do not stock Obsolete parts or components for more than 7 years or less!
I did
not indicate that Don's idea was totally wrong, he's pretty much right on target but I'm recommending the idea to stay with the use of
Aluminum and you can find this material at ACE Hardware Stores or at most local retail hobby shops. I can't remember the Supplier's name but they always provide a display with Copper, Brass and Aluminum in Flat, Round and Square Stock for the "Do It Yourself" project people.
As for the Yaesu Part numbers, the following information came directly from the Owners Manual listed under
GEARS:
QTY: 2 R9500540 TUNE, LOAD GEAR ASSEMBLY
QTY: 2 B3500550 GEAR
QTY: 2 S100ooo6 SHAFT COUPLER
QTY: 2 J6080103 POTENTIOMETER (SENSOR) VR1 & VR2
QTY: 2 M2190004 MOTOR M01 & M02
QTY: 2 B4101210 WORM GEAR
QTY: 1 R9500570 BAND GEAR ASSEMBLY
QTY: 1 B3500560 GEAR
QTY: 1 M2190004 MOTOR M03
QTY: 1 B4101210 WORM GEAR
QTY: 1 R9101220 GEAR (BAND SWITCH)
QTY: 1 S1000006 SHAFT COUPLER
Contact Yaesu Parts Department:
YAESU (VERTEX STANDARD)
10900 Walker Street
Cypress, CA 90630
714-827-7600
customerservice@vxstdusa.com
73,
Dan
WA9WVX
