1977/10/24 Caterpillar

Assembly Procedure For The 5P4721 Tube (Part Of The 5P4149 Conversion Group And 5P4150 Nozzle Testing Group){0650}

Usage:

The 5P4149 Conversion Group and 5P4150 Nozzle Testing Group have a 5P4721 Tube with the fittings already installed. But when a replacement 5P4721 Tube is ordered, the tube and fittings must be ordered separately and the tool assembled in your shop. The tube and fittings are shown in Illustration 1.

Illustration 1. 5P4721 Tube and Fittings. Note direction of the fitting sleeves.

Special care is needed in the assembly of this tool. To install the fittings on the tube, use the procedure that follows:

1. Assemble the nut and sleeve on the tube. Install the tube into the fitting and hold it in position until the nut is tightened.

2. During the first assembly of a new tube, tighten the nut only until the edge of the nut is even with the base of the threads on the fitting. Do not tighten beyond this point. (Illustration 2.)

Illustration 2. 5P4721 Tube with fittings installed.

Caterpillar Information System:

1977/10/17 Vent Tube Added To Jacket Water Aftercooler{1063}

1977/10/17 Separate Parts Of Oil Pump Cover Now Available{1304,1314}

1977/10/17 Improved Main, Thrust And Connecting Rod Bearings Have Aluminum Alloy With More Strength{1230}

1977/10/17 Preparation Of Truck Engines For Cold Weather Operation{1300,1000}

1977/10/17 Fabricated Extension Prevents Fuel "Splash" During Injection Valve Testing{0650,1254}

1977/10/10 If The Fuel Setting Dimension Is More Than 7.00 MM, Remove The End Play Of The Camshaft To Make The Fuel Setting{1257,1286}

1977/10/10 Improved Oversize And Undersize Connecting Rod And Main Bearings With Higher Strength Aluminum Alloy{1203,1219,1230}

1977/10/10 Use Only The Larger Size Inserts To Make A Repair To Cylinder Block Counterbores For Cylinder Liners{1201,1216,1217}

1977/10/10 Troubleshooting The Tachometer System Of The 4S6553 Engine Instrument Group{0651}

1977/10/10 New Front Housing Has Stronger Boss For Alternator{1151}

1977/10/10 Fuel Transfer Pump Shaft With Chromium Plate{1256}

1977/10/10 Be Sure To Drain Oil From The BrakeSaver At Every Lubricating Oil Change Period{1318,1155}

1977/10/24 Adjust Shop Tire Pressures For Operation In Cold Temperatures{4203,4204}

1977/10/24 New Piston Group Has Improved Iron Band In The Piston Body{1214}

1977/10/24 Replacement Bearings Have Aluminum Alloy With More Strength{1203,1213,1230}

1977/10/31 New Hydraulic Flow Meter Has Many Improvements To Make It Easier, Faster And Safer To Use Than The Former Flow Meter{0651,5050}

1977/10/31 New Governor Spring Changes Speed Regulation{1264,1286}

1977/10/31 With New 5P7448 Adapter, Earlier Fuel Injection Valves And Nozzles Can Be Tested And Adjusted On The 5P4150 Nozzle Testing Group{0651,1254}

1977/10/31 Some Wobble Is Acceptable In Rubber Vibration Dampers For Crankshafts{1205}

1977/11/07 Crankshaft Support Groups Are Available To Measure Bent Crankshafts{0653,1202}

1977/11/07 Improved Crankshaft Main Bearings And Connecting Rod Bearings With Higher Strength Aluminum Alloy{1203,1219,1230}

1977/11/07 Precision Oil Pump Bearings Now Available{1304}

1977/11/14 New Electric Starting Motor Has Longer Brush Life{1453}

1977/11/14 Exhaust Valves With 30° Face Angle Now Used For Parts Service{1101,1103,1105}