Mach III Clutch 118SI & 118SI-ULOW - Manual (Page 4)

7/10/2013 CLUTCH_SENSIFLEX_SI_MANUAL Page 4 of 5
Repair Parts & Services
Kits Available Contents Part Numbers
Facing Kit Friction Disc & Mounting Screws 38SI-FCGK, 38SI-ULOW-FCGK,
58SI-FCGK, Etc. . . .
Repair Kit Friction Disc, Mounting Screws, Spring(s),
Diaphragm 38SI-RPRK, 38SI-ULOW-RPRK,
58SI-RPRK, Etc. . . .
For part numbers of components not included in the kits above, please contact Mach III Clutch,
Inc. or your distributor. Factory repair is also available. A return materials authorization (RMA)
number must be obtained prior to sending any unit in for repair. Mach III Clutch is not
responsible for products returned without authorization.
IV. Repair Procedure
Tools Needed
Hex wrench set
Retainer (snap) ring pliers
Flat head screw driver
Scraper (if replacing bearings)
0.010 Inch feeler gauge Compounds Required
Grease
O-Ring lubricant
Anti-Seize Lubricant
A. DISASSEMBLY
Loosen set screws using appropriate hex wrench and slide the clutch off of the shaft. Place the
clutch on a work surface with the air cylinder end of the clutch upward. Loosen the set screw
in the retainer nut and remove nut using a wrench or channel lock pliers. The air cylinder
bearing is a slide fit on the drive hub. The cylinder, piston and cone assembly should come off
of the drive hub together. You may need to strike the hub, or on an object inserted into the
hub with a rubber mallet or similar soft face hammer, while pulling the cylinder upwards to
remove.
B. DRIVE SURFACE INSPECTION & FRICTION DISC REPLACEMENT
Inspect the drive surface of the cast iron sleeve input member. Grooves in the surface would
indicate that the friction disc should have been replaced sooner and the heads of the mounting
screws have made contact. This surface must be free from grooves, burrs and foreign materials
in order for the clutch to operate properly. If damage is pronounced, please contact Mach III
Clutch or your distributor about replacing the sleeve and procedure. In addition, clutch should
be inspected for discoloration (turning blue). If discoloration is present, the unit is being
operated beyond its capacity and Mach III Clutch should be contacted for assistance. To
replace the friction disc, remove brass screws and friction disc, make sure mounting surface is
smooth and free from contamination. Mount new friction disc by snugging all screws first then
tighten firmly using an alternating sequence. Do not over-tighten.
C. INSPECTION OF BEARINGS
Check bearings for external damage (missing seals, etc.). Make sure the bearings rotate freely
and smoothly by hand. If bearing replacement is necessary, consult Mach III or your distributor
for the bearing sizes and replacement procedures.