' I am looking forward to reading the material. I have two of the odd ball assemblies. G-2-168. They are the assemblies that don't have the spring clips. They used a small amount of Goodyear rubber cement between the brake pads and expander tube.
Bob
On Thursday, December 21, 2017, 2:23:15 PM PST, Thomas Rood
tdrood@yahoo.com [fairchildclub] wrote:
Excerpts from AN 03-258-9, "Handbook of INstructions With Parts Catalog for Expander Tube Brakes" dated 15MAR1945......
From the SERVICE INSPECTION, MAINTENANCE AND LUBRICATION section:(2) Brake clearance (with cool wheels and brakes, 0.015-inch clearance)... ...When in service, the clearance should never be less than .010 inch. The maximum brake clearance is variable because of the unpredictable swelling of the expander tube. In order to determine at what time brakes should be overhauled the brake thickness will be measured. Brake blocks should not be permitted to wear to less than 1/2 inch. The brake clearance might exceed. 0.075 inch and still be within the above tolerance, however, at any time the brake clearance exceeds 0.075 inch the brake block thickness should
be checked.
From the Overhaul Section (for 9-inch brakes):(2) The G-2-67, G-2-122, and G-2-201 brakes should be turned to a diameter 8.970 ± .005 and the G-2-168, G-2-42, and G-2-210 brakes to 8.960 ± .005 before assembling on the strut.
NOTE: G-2-67, G-2-122, and G-2-201 are 9" x 1.5" assemblies; G-2-210 and G-2-210-1 are 9" x 2" assemblies; I can find NOTHING in the manual that identifies what the G-2-168, G-2-42 assemblies are, but I think it is safe to assume the are 9" x 2" as well..
T
Thomas D Rood A&P, IA, FAA-DER, BSME Managing Partner Aviation Technology Associates, LLC 704-517-7402 - cell 704-249-2205 - office
www..aviationtechnologyassociates.com
On Thursday, December 21, 2017, 11:50:14 AM EST, John Ellis
johnee35@att.net [fairchildclub] wrote:
Quoting from Erection & Maintenance T. O. No. 01-115GA-2...
"New blocks must be ground, concentric with center hole in brake on
suitable machine to a diameter that will give proper clearance for
brake to drum"
Without doing this, blocks have high spots causing very little contact
with drum, thus very poor braking action..
The high spots can be reduced by sanding on the aircraft..
THE BLOCKS CONTAIN A LOT OF ASBESTOS.. IF DOING THIS WEAR MASK
TO AVOID BREATHING DUST..
John
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