North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
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8.8.2 The shoulder between the tapered roller bearings (configurations A, B, and F) and
the bearing shoulder (configuration E and G) must not be damaged, and must have
straight sides. If a bearing has failed and spun on the shaft of the shoulder may be
worn thin, tapered and/or otherwise damaged. The shoulder width (configuration A, B,
and F) is .255” / .245” (6.477 mm. / 6.223 mm.) wide when new.
8.8.3 Grease or oil passages should be thoroughly cleaned to be sure they are free of
dirt and contaminants.
8.8.4 Threads must not be damaged.
8.8.5 Keyways must not be worn so as to allow side movement of keys.
8.8.6 Clutch taper should not be worn, although a small amount of wear, if worn evenly
360° around the shaft may be serviceable as long as the clutch will seat securely and
squarely and the jam nut will tighten against the clutch body. If too much wear has
occurred the clutch will slide too far onto the taper and the jam nut will bottom out on
the thread or shoulder before it contacts the clutch body.
9.0 DISASSEMBLE THE CLUTCH
(refer to parts illustration in section 6.2)
9.1 Preparation For Disassembly
9.1.1 Disengage the clutch.
9.1.2 Match-Mark the clutch body (109), pressure plate (112) , release sleeve (125) (and
center plate (111) on 14” HD (DP) and 14” HD(TP) clutches).
Pilot Diameter New
1.1822”-1.1816”
1.3781”-1.3766”
1.7718”-1.7713”
Minimum Dimension (Worn)
1.1816” (30.0126 mm.)
1.3766” (34.9656 mm.)
1.7713” (44.9910 mm.)
