Mach III Clutch MBR2K-STH User Manual

Page 4

7/9/2013

CLUTCH_MECH_W_ADAPT_AIR_HD_MANUAL

Page 4 of 4

A. FRICTION DISC & SPRING REPLACEMENT

(1)

Remove clutch from shaft and place in vertical position with drive disc end facing
upward.

(2)

Remove retainer ring, drive discs, springs and friction discs.

(3)

Drive discs should be clean, dry and free of burrs or nicks.

(4)

Reassemble drive & friction disc section according to reference drawing using new
friction discs, springs and steel drive discs as necessary.

(5)

Assure that the gear tooth drive discs move freely on the drive hub and that the gear
tooth friction discs move freely in the ring gear.

B. O-RING REPLACEMENT

(1)

Remove clutch from shaft and place in vertical position with cylinder end facing upward.

(2)

Remove retainer ring from drive hub.

(3)

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, while pulling the cylinder upwards to break the

Loctite

seal.

(4)

Remove inner retainer ring from the drive hub.

(5)

Next, remove sub-assembly consisting of the piston, bearing & cone. The disc
package (consisting of friction discs, drive discs & springs) will now be accessible.
Note that the first drive disc contains a milled hole. It is important that this disc is
returned to the top during reassembly to line up with the screw in the cone.

(6)

Separate cylinder and piston/bearing/cone sub-assembly taking care not to bend the
pins which connect them.

(7)

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.

(8)

A very thin coat of O-ring lubricant should also be applied to the inner walls of the
cylinder.

C. REASSEMBLY

(1)

Place the piston/bearing/cone sub-assembly over drive hub making sure the screw
head in the cone is inserted in the corresponding hole milled in the drive disc. This
prevents the cone from skidding on the drive disc.

(2)

Replace the inner retainer ring on the drive hub.

(3)

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.

(4)

Place a small amount (dab) of grease (Mantek

Elite Red or equivalent) on the pins

that connect the air cylinder and piston.

(5)

Apply a thin coat of Loctite