1987/02/16 Caterpillar

Change To Interval For Valve Lash Adjustment{1103,1105,1123}

Usage:

3400 Family of Engines

Reference: All Operation and/or Maintenance Guides for the 3400 Family Of Engines in all applications.

The recommended interval for intake and exhaust valve lash adjustment has been changed for the 3400 Family Of Engines. This includes the current and non-current 3400 Family Of Engines in all applications. (An earlier article in the September 3, 1984 Service Magazine and the current Guides show the new interval only for 3406B Truck Engines.) The new recommended interval is:

"Adjust the intake and exhaust valve lash at the first oil change (12,500 mi or 20 000 km for on highway truck engines). After that, adjust the valve lash every 2000 Service Hours (100,000 mi or 161 000 km for on highway truck engines), or once a year".

This new recommendation will help extend the service life of the valve train parts. Formerly, there was no adjustment recommended until 2000 Service Hours, or one year. Be sure to note this change in all the affected Guides.

Caterpillar Information System:

1987/02/16 Check Bolt Tightness Before Replacing Gaskets To Stop Coolant Leakage{1393,1362}

1987/02/16 Incorrect Use Of Fuel Heaters Can Reduce Engine Power{1296}

1987/02/16 Guidebook For Caterpillar Inspection And Maintenance Program For Standby Generator Sets{0354,0370,0372}

1987/02/16 Polarity Connections And Use Of Service Meter Films When Service Meter Kits Are Installed{7480,7000}

1987/02/16 Self-Powered Hour Meters Available{7480,7450}

1987/02/16 12-Volt Starter Solenoid Available For 7T2265 And 7T2266 Starting Motors{1407}

1987/02/16 Resistors Used To Protect Electrical Wiring{1400}

1987/02/16 The Importance Of The Disconnect Switch In Regard To Fire Suppression Systems With Automatic Actuation{7401}

1987/02/16 Use The Correct Vacuum Pump When Servicing Air Conditioning Systems{7320}

1987/02/16 New Penetrating Oil/Lubricant Available (NACD Only){0645,0600}

1987/02/09 How To Hone Cylinder Tubes To Accept Caterpillar Oversized Cylinder Seals{7562}

1987/02/09 Source For White Paint Used On Some Caterpillar Engines{7559}

1987/02/16 Some 2P4005 Oil Filter Assemblies May Be Difficult To Install{1318}

1987/02/16 Fuel Ratio Control Diaphragms On 3161 Governors{1278}

1987/02/16 Grommets Added To Dampen Vibration{1307}

1987/02/23 Stronger Timing Gear Housing; Additional Stud Used At Top Of Housing{1151,1201}

1987/02/23 Two Front Timing Gear Housings Available{1162,1150}

1987/02/23 Water Temperature Regulators Standardized{1355}

1987/03/02 Bolt-On Roller Groups Available For Competitive Hydraulic Excavators{4150}

1987/03/02 Tools Available To Install Plastic Tie Straps{0709,0738}

1987/03/02 Check For Plugged Orifices In Mechanical Pressure Gauges{7450}

1987/03/02 Water Separator Available{1263}

1987/03/02 New 8T5261 Bushing Installer And Remover Adapter Tool Available{0600}

1987/03/02 New Fan Drives Used{1358}