1979/05/21 Caterpillar

New Flywheel Housing Corrects Clearance Problem With Cylinder Block{1157,1158,1201,1453}

Usage:

3306 Truck Engines (76R)

Reference: Service Magazine, June 19, 1978, Page 9, "Grind Material From Boss On Parts Service Cylinder Block To Give Clearance For Starting Motor Mounting Bolts".

Description of Change: When the 9N2796 Flywheel Housing was used on 3306 Truck Engines, the boss on the lower left rear side of the 2P8776 Cylinder Block had to be ground off to give enough clearance for the starting motor lower mounting bolt. This clearance problem has been corrected by the release of a new flywheel housing that has the starter mounting flange rotated (turned) 15 degrees counterclockwise, as viewed from the front of the engine. Because of the 15 degree rotation of the starter mounting flange, a new starter motor nose housing also has been released to prevent possible contact with the ring gear teeth. In addition, two new starting motor groups have been released that have the new nose housing.

The former starting motors can be used with the new flywheel housing, if the new nose housing assembly is installed. The former starting motors have not been canceled. A Special Instruction, Form SMHS7513 gives information on how to install the starting motor on the new flywheel housing.

Adaptable To: 3306 Truck Engines, with Serial Numbers 76R2810-up.

Caterpillar Information System:

1979/05/21 Shorter Mounting Bolts Used For Glow Plug Wiring{1403,1412}

1979/05/14 Two Fuel Pressure Pumps Are Available To Increase Fuel Pressure{1250,1295}

1979/05/14 New Filler Bands Give A Better Seal Between The Cylinder Liners And Cylinder Block{1201,1216}

1979/05/14 5P3519 Piston Ring Gauge Has Improved Design For Better Accuracy And Easier Use; Corrected Information For Use On Pistons That Have Two Ring Grooves{0653,1214}

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1979/05/07 Serialized Attachments Added To Machine Parts Books{0375}

1979/05/07 New Oil Pump Has Improved Relief Valve For Better Pressure Control{1304}

1979/05/07 An Ammeter Calibration Group Is Now Available{0651}

1979/05/07 Change In Part Number Of Water Temperature Regulator Used In Attachment Oil Cooler Groups{1355,1378}

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1979/05/07 New Hose Assembly Will Give Longer Service Life With High Oil Temperatures{3314}

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1979/05/21 How To Prevent Cylinder Block Failure From Cracks{1201}

1979/05/21 New Washers For Injection Valve Nozzles Must Be Added To Valve Grinding Gasket Kit When Used With Later Engines{7555,1254}

1979/05/21 Rod Bearings For Parts Service Have Reliefs (Grooves) Cut On The Outside Diameter{1219}

1979/05/28 9S8100 Tool Group Changed To Use With Fuel Transfer Pump Only{0622}

1979/05/28 A New Method To Clean And Polish Engine Valve Stems{0674,1105}

1979/05/28 Seat Belt Maintenance{7327}

1979/05/28 New Type Products Available To Clean Cooling Systems{1350}

1979/05/28 Correct Locations To Connect Gauges For Checks Of Engine Oil Temperature And/Or Pressure{7455,7450,1300}

1979/06/04 New "L-Shaped" Clutch Plates Now Used{3302}

1979/06/04 New Caterpillar Yellow Paint{0670}

1979/06/04 Check Crankshaft Seals During Installation Of Engine Overhaul Gasket Kits; Add A Wear Sleeve When Needed{7555,7558,1161}