3-68. (MODEL WPES-1) BRAKE ASSEMBLY MAINTENANCE - continued.
Hold rags loosely over both ends of splined tube through slack adjuster to catch dirt and solvent. Blow low-
pressure compressed air into lubrication fitting hole on slack adjuster.
Move rags so that clean material is over end of tube and blow air into lubrication fitting hole. Repeat until
rags stay clean and dry.
Using soft-bristled brush, sweep dirt and metal filings off brakeshoes and brakeshoe linings.
Replace all four brakeshoe linings as a set.
Inspect brakeshoe linings for excessive or uneven wear.
Inspect brakeshoe linings for oil or grease.
Inspect splines of camshaft and slack adjuster for chipping, cracking, or excessive wear.
Inspect washers, bushing, anchor pin links, brake roller pins, and bearing surfaces of camshaft and spider for
excessive wear or deformity.
Inspect spring for cracks or deformity.
Inspect retract spring pins for stuck or missing end pins, excessive wear, or deformity.