Mach III Clutch D5C3R-21H , D5C3R-21HCA & D5C3R-21HSS User Manual
Page 4
7/9/2013
BRAKES_NEMA_SPRING_MANUAL
Page 4 of 4
B. FRICTION DISC REPLACEMENT ONLY
(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 and top plate.
(4)
Remove retainer ring, race and release springs.
(5)
Remove drive discs, friction discs and springs.
(6)
Drive discs should be clean, dry and free of burrs or nicks.
(7)
Reassemble drive disc, friction disc, springs using new friction discs, steel drive discs
and springs as necessary.
(8)
Assure that drive discs move freely on the drive hub and that the friction discs move
freely in the cylinder or ring gear.
C. O-RING REPLACEMENT
(1)
Follow COMPLETE DISASSEMBLY instructions above.
(2)
Separate cylinder and piston.
(3)
Inspect O-ring seals. If worn, replace using new O-rings that have been lubricated with
an O-ring lubricant such as Dow Corning
®
#
4 Compound or equivalent.
(4)
A very thin coat of O-ring lubricant should also be applied to the inner walls of the
cylinder.
D. REASSEMBLY
(1)
Replace the piston in the cylinder.
(2)
Make sure the tapped holes in the piston are aligned with corresponding holes in the
cylinder.
(3)
Replace the spacers and springs.
(4)
Replace the pressure plate and screws making sure screws are tightened to uniform
torque based on bolt size and use proper Loctite
®
(or equivalent) compound to assure a
permanent mount.
(5)
Inspect the inside diameter of the bearing in the air cylinder. If Loctite
®
residue is
present, gently scrape and assure that the surface is clean.
(6)
Apply a thin coat of Loctite
®
#609 retainer compound to the inside diameter of the air
cylinder bearing, then slide the air cylinder/bearing sub-assembly over the drive hub.
Applying excessive Loctite
®
will make future disassembly more difficult.
(7)
Make sure that all components are well seated and replace the outer retainer ring.
(8) Reassemble drive, friction disc, and springs using new friction discs, springs and steel
drive discs as necessary.
(9) Apply air to the brake.
(10) Replace top plate and retainer ring.
(11)
See “Brake Installation” portion of these instructions for the proper procedure for
reinstalling the brake.
Technical assistance is available by contacting Mach III Clutch, Inc.
Mach III Product Warranty
Mach III Clutch, Inc.
101 Cummings Drive ● Walton, KY 41094
Toll free 866.291.0849 ● International 859.291.0849 ● Fax 859.655.8362