1984/12/12 Caterpillar

Rear Power Take-Off Clutch Can use Nonmetallic Plates And Grease Lubrication For Main Bearings

Usage:

3208 Industrial Engines

Reference: Engine News, March 16, 1983, Page 2, "New Clutches For Rear Power Take-Off".

The 2N1374 (Twin Disc SP211) Rear Power Take-Off (PTO) Clutch Group used on earlier 3208 Industrial Engines, can be changed to use nonmetallic clutch plates. The 3N7952 Nonmetallic Clutch Plates can be used to replace the 7S7934 Sintered Iron Clutch Plates. The nonmetallic clutch plates give improved service life. When a nonmetallic clutch plate is installed, inspect the clutch discs and drive ring. If the drive ring is worn or damaged it must be replaced.

In some applications, it may be desirable to change the 2N1373 Clutch ssembly from oil lubrication to grease lubrication. The grease lubrication conversion is given in Special Instruction Form SMHS8189. See the illustration for the dimensions of the fabricated labyrinth seals needed. Two labyrinth seals, fabricated from mild steel, will be needed for each clutch.

Fabricated labyrinth seal.

Caterpillar Information System:

1984/12/12 New Seal Used In Alternator Mounting Group

1984/12/12 Identification Of Camshaft Groups And Valve Mechanism Groups

1984/12/12 Preferred Engine Timing Procedures

1984/12/12 Addition Of Lubricator Will Help Prevent Corrosion In Air Prelube Motors

1984/12/12 Additional Clamp Reduces Vibration Of Turbocharger Oil Supply Line

1984/12/12 New 76.6°C (170°F) Water Temperature Regulators Used In Inlet Controlled Cooling Systems

1984/12/12 Starters That Remain Engaged After Engine Is Running

1984/12/12 Thread Identification Kit Available

1984/12/12 Remanufactured Turbocharger Groups

1984/12/12 Improved Turbocharger Oil Drain Elbows

1984/12/12 A Soot Filter Is Available For Use With Air Cleaners

1984/12/12 New Pressure Gauges Have Dual Scales [kPa (psi)]

1984/12/12 Important Differences In Engine Arrangements On 3208 Engines Equipped With Turbochargers

1984/12/12 Remanufactured Cylinder Head Groups

1984/12/12 Use Care When Installing Circuit Boards In Regulators

1984/12/12 New Fuel Injector Assembly Reduces Smoke When Operating At Lower RPM And Load

1984/12/12 Bonnet Of Fuel Injection Pump Group Now Serviced Separately

1985/01/16 Install Different Body Assembly In Clutch Group To Correct Harsh Shifting

1985/01/16 Improved Valve Mechanism Cover Group Has A New Valve Cover And Seal

1985/01/16 Valve Lash Adjustment Not A Warranty Item

1985/01/16 Additions To Reference Chart For Major Production Changes

1985/01/16 Remanufactured Air Fuel Ratio Controls (U.S. And Canada)

1985/01/16 List of Service Publications

1985/01/16 Correct Specifications For Crankshaft Deflection