Paccar Braden PD12C, Инструкция по установке, обслуживанию и ремонту

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MOTOR SUPPORT — BRAKE CYLINDER SERVICE
NOTE: Starting mid-year 1996, BRADEN changed the steel
brake separator discs from a splined tooth design to a lobed
design. Th is required a change to the motor support and
brake cylinder and the addition of a spring spacer. A hoist
with the lobed discs can be identi fi ed by a machined groove
on the outside diameter of the motor support. When replac-
ing steel brake discs, the motor support or brake cylinder, care
must be taken to properly identify the correct parts. Splined
discs will remain available as spare parts.
New lobed steel brake separator plates and motor support.
Note groove on outside diameter of motor support.
Although most photos in this section show splined discs, all
procedures are the same except where speci fi cally noted.
DISASSEMBLY
1. A ft er removing the motor support and brake clutch as-
sembly, continue brake cylinder disassembly by removing
the spacers, friction brake discs and steel brake discs.
2. Remove the piston backup ring and pressure plate.
3. Remove the brake springs.
CLEAN AND INSPECT
1. Th oroughly clean and inspect all parts at this time. Check
brake piston sealing surfaces on brake cylinder and motor
support. Be sure brake release port is free of contamina-
tion.
2. Check oil seal and bearing surfaces on brake cylinder for
damage or wear.
3. Place friction brake disc on fl at surface and check for
distortion with a straight edge. Friction material should
appear even across entire surface with groove pattern vis-
ible. Replace friction disc if splines are worn to a point,
disc is distorted, friction material is worn unevenly, or
groove pattern is worn away.