1979/02/19 Caterpillar

Modification Of 5P9726 Plug Gauge That Is Used To Check Brake Wear{0653}

Usage:

777 Truck, 776 Tractors, 773B Truck, 772B Tractor

It is possible that the two components of the 5P9726 Plug Gauge can be separated and become lost. To prevent a loss of the two components, a simple modification can be made to hold the components of the 5P9726 Plug Gauge together.

Modification To 5P9726 Plug Gauge:

... Remove the rod from the plug; then drill a 1.7 mm (No. 51) hole through the end of the rod as shown in Illustration 1.

Illustration 1. Location of hole in rod.

Illustration 2. Installation of rod in plug and 4B4863 (#8) Washer and 3B4604 Cotter Pin in rod.

... Install the rod in the plug; then install a 4B4863 (#8) Washer and a 3B4604 Cotter Pin in the rod as shown in Illustration 2. The rod will now be held in the plug to prevent loss of the components.

This modification can be made to all earlier 5P9726 Plug Gauges. The 3B4604 Cotter Pin and the 4B4863 (#8) Washer are available from the Parts Department. All future production of the 5P9726 Plug Gauge will include this modification.

Caterpillar Information System:

1979/02/19 Use Correct Procedure To Clean The Engine Lubrication System If Permanent Type Antifreeze (Ethylene Glycol) Is In The Engine{1318,1350}

1979/02/19 Use SIRS To Keep Service Literature Current{0374}

1979/02/05 High Sulfur Fuel Can Cause Severe Engine Wear And Internal Damage{1280}

1979/02/05 Stronger Suction Bell Assembly Now Used In Engine Oil Lines Group{1318,1307}

1979/02/05 Federal Law Prohibits Tampering With Noise Control Systems{0116}

1979/01/29 Fuse And Wire Assembly Is Available For Protection Of Earlier 6N5906 Service Meters{7480}

1979/01/22 Ether Starting Aid Groups Are Now Available{1456}

1979/01/22 New Tachometer Drive Adapter Has Increased Service Life{7462,1288}

1979/01/22 Current Chart For Dynamometer Adapters{0651,1000}

1979/01/15 6V83 Emery Polishing Paper{0675}

1979/01/15 Removal And Installation Of Taper Type Bearings{0622,1214,1219}

1979/01/15 5P9705 Tapered Rod Tool Group Used For Removal And Installation Of Piston Pin Bearings In Tapered Connecting Rods{0622,1214,1218}

1979/02/19 New Exhaust Valve And Valve Guide{1104,1105}

1979/02/19 New Exhaust Pipe Connector Makes A Tighter Seal Between Pipe And Manifold{1061,1059}

1979/02/19 Engine Valve Springs Are Now Made Of Carbon Steel Alloy{1101,1108}

1979/03/05 Main Bearings Now Have Larger Diameter Oil Hole For Better Lubrication Of Main And Rod Bearings{1203,1219,1300}

1979/03/05 New Engine Cylinder Block Used{1201}

1979/03/05 New Piston And Connecting Rod Are Tapered In Area Of Piston Pin{1213,1214,1218,1219}

1979/03/05 New Fuel Injection Nozzles Are Used In 3208 Engines{1254}

1979/03/05 Improvements Made To Fuel Injection Pump And Governor Group{1253,1281,1286}

1979/03/05 New Oil Pan Assembly Uses An O-Ring And Plug For A Better Seal{1302}

1979/03/05 Engine Mounted Exhaust Brake Systems Can Be Used To Extend Service Brake Life{1050}

1979/03/12 New Larger Capacity Water Separator Is Available{1250}

1979/03/12 Retroreflective Tape Makes Phototach Kit Easier To Read{0651,0653}