7/9/2013 CLUTCHBR_SHAFT_DBLSPKT_MANUAL Page 4 of 4
CLUTCH & BRAKE FRICTION DISC & SPRING REPLACEMENT CONTINUED:
(7) Drive discs should be clean, dry and free of burrs or nicks.
(8) Assure that drive discs move freely on the drive hub and that the lugs of the friction
discs move freely in the drive slots of the sleeve.
(9) Reassemble drive & friction disc section according to reference drawing using new
friction discs, springs and steel drive discs as necessary. Note that the first drive disc
contains a milled hole. It is important that this disc is replaced first during
reassembly to line up with the screw in the cone. After installing remaining friction
discs, drive discs and springs it may be necessary to use an arbor press to compress
the springs to replace retainer ring.
(10) Replace sprocket/sleeve assembly and retainer rings according to reference drawing.
(11) If cylinder is to be disassembled omit steps 9 & 10.
B. CYLINDER DISASSEMBLY
(1) Place clutch-brake in vertical position with cylinder end facing upward.
(2) Remove retainer ring from drive hub.
(3) Remove air cylinder sub-assembly consisting of the piston, bearing & cone 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, while pulling the
cylinder upwards to break the
Loctite
®
seal.
C. O-RING & BRAKE FRICTION DISC REPLACEMENT
(1) Separate cylinder and piston/bearing/cone sub-assembly.
(2) Remove & inspect O-ring seals.
(3) Replace 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. Be careful not to contaminate brake friction disc with O-ring lubricant.
D. REASSEMBLY
(1) Replace the piston/bearing/cone sub-assembly into cylinder.
(2) 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.
(3) 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.
(4) Replace the retainer ring. Invert clutch-brake and seat cylinder sub-assembly firmly
against retainer ring.
(5) Replace drive discs, friction discs and springs according to “CLUTCH & BRAKE
FRICTION DISC & SPRING REPLACEMENT” portion of these instructions.
(6) Replace the sleeve. Repeat instructions 2 & 3 above regarding Loctite
®
.
(7) See “CLUTCH INSTALLATION” portion of these instructions for the proper procedure
for reinstalling the clutch-brake.
Technical assistance is available by contacting Mach III Clutch, Inc.
Mach III Product Warranty
http://www.machiii.com/Resources/Warranty-Info.asp
Mach III Clutch, Inc.
101 Cummings Drive ● Walton, KY 41094
Toll free 866.291.0849 ● International 859.291.0849 ● Fax 859.655.8362
info@machiii.com ● engineering@machiii.com ● www.machiii.com
(5 pages)
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