Mach III Clutch D5C3R-21H , D5C3R-21HCA & D5C3R-21HSS - Manual (Page 3)

7/9/2013 BRAKES_NEMA_SPRING_MANUAL Page 3 of 4
V. Parts diagram
Repair Kit: Part number = Brake Product Number + “-RPRK” (e.g. D3C3R-56H-RPRK)
Additional
Parts: Contact Mach III to obtain a complete listing of additional parts kits available for
your specific brake. Please reference product number when calling or e-mailing.
Repair
services: Factory repair is available. A return materials authorization (RMA) number must
be obtained prior to sending any unit in for repair
VI. Repair Kit Installation Procedure
Tools Required
Hex Wrench Set
Rubber Mallet or similar soft face hammer
Retainer (snap) Ring Pliers
Scraper
Compounds Required
Grease
O-ring Lubricant
Loctite
®
#609 Retaining Compound
Anti-Seize Lubricant (for re-installation)
A. COMPLETE DISASSEMBLY
(1) Remove brake from shaft and place in vertical position with top plate end facing
upward.
(2) Apply air to brake to relieve spring pressure from top plate.
(3) Remove retainer ring.
(4) Remove top plate.
(5) Remove retainer ring and race over release springs.
(6) Remove drive discs, friction discs and springs.
(7) Remove air supply from brake.
(8) Invert brake and remove retainer ring from drive hub.
(9) Remove air cylinder with bearing from drive hub. The air cylinder bearing is a slide fit
on the drive hub and is affixed to the drive hub with a thin coating of Loctite
®.
You may
need to strike the hub, or an object inserted in the hub with a rubber mallet or similar
soft face hammer to break the
Loctite ® seal.
(10) Next, remove the screws from pressure plate.
(11) Remove spacers and springs.
(12) Separate piston from cylinder.
DRIVE HUB
CYLINDER
PISTON
BEARING
RETAINER RING
O-RING
FRICTION DISC
DRIVE DISC
SPRING
SCREW WITH SPACER
TOP PLATE
PRESSURE PLATE
RETAINER RING
RELEASE SPRINGS
RACE