1992/08/24 Caterpillar

New Cylinder Head Group Provides Lower Valve Guide Temperatures {1100,1104,1112,1123}

Usage:

G3306 (07Y) Engines

SUPPLEMENT: 10/05/92

Service Magazine; August 24, 1992; Page 9; "New Cylinder Head Group Provides Lower Valve Guide Temperatures," on G3306 (07Y) Engines.

Disregard this article. Make reference to the article with the same title in this issue.

--------------- END SUPPLEMENT ---------------

Description of Change: A new cylinder head group is used to provide improved cooling to the valve guides. The improved cooling will reduce the chances of the exhaust valve sticking in the valve guides.

Adaptable To: The new 9Y3640 Cylinder Head Group and 7E1556 Valve Mechanism Group are in effect with 3306 TA Natural Gas Engine 07Y4100 and 3306 NA Natural Gas Engine 07Y4126.

The new service replacement 6I2402 Cylinder Head Group is available to provide improved valve guide cooling to earlier engines. The new service replacement cylinder head group can be used with the existing valves and valve mechanism.

Caterpillar Information System:

1992/08/24 Reusability of Exhaust Valves in All Caterpillar Engines {1105}

1992/08/24 New Electronic Unit Injector (EUI) With New Style Solenoid Used; New Unit Injector Wiring Group Used {1290}

1992/08/24 Application Changes For Electronic Unit Injector (EUI) Part Numbers {1290}

1992/08/10 New Carrier Assembly Used In Governor And Fuel Pump Drive Groups {1288,1299}

1992/08/10 Proper Alternator Bench Testing {1405,1400}

1992/08/10 Taller Water Seals Used In Cylinder Head Groups {1115}

1992/07/27 Boxes/Cartons Containing Used Cores Should Be Immediately And Clearly Identified{0661}

1992/07/27 New Hardware Used In Water Lines Group{1380}

1992/07/27 New Engine Control Module For EMCP Now Available{4450,4490}

1992/07/27 New Strap-Cable Used In Fastener Group{7553}

1992/07/20 New Ways To Use The 6V2100 Multitach{0775,0781,0785}

1992/07/20 Clutch (PTO) Warranty On Morbark Industries Products Powered By Caterpillar Engines{7758}

1992/08/31 New Deutsch HD-10® Electrical Connectors Used{1400}

1992/08/31 New "3406B Engine Instructor Manual" Available{0374}

1992/08/31 Be Sure The Fuel Injection Pump Housing Is Compatible With 0R0715 And 0R2545 Remanufactured Short Blocks{1201,1253}

1992/08/31 Connecting Rod Bearing Eliminates The Need For Mid-Life Connecting Rod Bearing Roll-In{1219,1202}

1992/08/31 Supplemental Coolant Additive Requirements{1352,1395,1063}

1992/09/07 Governor Specifications Are Available Through The Technical Information System{1264,0374}

1992/09/07 Major Engine Component Changes{1201,1202,1205,1218,1219,1230,1253,1288,1331}

1992/09/21 Replacement Mechanical Temperature And Pressure Gauges (Indicators) Retained By Push-On Metal Retainers{7450}

1992/09/21 New Plug And O-Ring Can Help Prevent Oil Leakage At The Flywheel Housing Gasket{1157,1307}

1992/09/21 New Fuel Injection Pump Groups Have Larger Diameter Camshaft Bores, New Lifter Assembly, And Shorter Plunger And Barrel Assembly{1251,1253,1281,1292}

1992/09/28 New Self Locking Bolt Used On Engine Side Covers {1201}

1992/09/28 Service Tools Available {0600,0700}