1977/11/14 Caterpillar

New Electric Starting Motor Has Longer Brush Life{1453}

Usage:

D4D, D5, D5B, D6C Tractors;
561C Pipelayers;
951B and C, 955K and L, 920, 930, 950 Loaders;
518 Skidders;
120, 120G, 130G, 140G Motor Graders;
215, 225 Excavators

Description of Change: A change has been made to the Delco-Remy electric starting motor used on the above machines. Either the Delco-Remy or the Prestolite electric starting motors are used on these machines. The service part numbers for each are shown in the Parts Book.

On the Delco-Remy electric starting motor, a change has been made to the brush holders. The new brush holders will keep the brushes in better contact with the commutator bar and result in longer commutator bar life.

Adaptable As: This improvement can not be installed on former Delco-Remy electric starting motors.

Caterpillar Information System:

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

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

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

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

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 New Governor Spring Changes Speed Regulation{1264,1286}

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}

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

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

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

1977/10/24 Assembly Procedure For The 5P4721 Tube (Part Of The 5P4149 Conversion Group And 5P4150 Nozzle Testing Group){0650}

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

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

1977/11/14 New Exhaust Manifolds Made Of Stronger Material{1059}

1977/11/21 New Elbow Between Turbocharger And Air Inlet Manifold Has Hole For Ether Starting Aid{1058,1456}

1977/11/21 New Crankshafts Do Not Have Lightening Holes And Lubrication Passages Connected Together{1202,1219}

1977/11/21 Larger Diameter Holes Are Now Used In The Rocker Arm Shaft To Give More Oil Flow To Rocker Arm Bearings{1102}

1977/11/21 Improved Shaft Seal Material Used In All Vane-Type Hydraulic Pumps; Seal Kits Are Canceled{5055}

1977/11/21 New Housing And Impeller Assembly For Water Pump And Drive Group{1361}

1977/11/21 Add Chamfer To Cartridge Assembly Bearings To Prevent Oil Leakage{1052,1053}

1977/11/28 Reference Chart For Main And Connecting Rod Bearings{1203,1219,1230}

1977/12/05 Water Separators Needed On Machines And Engines In The Field With SMFS{1250,0336}

1977/12/05 New Oil Filter Base Has Reinforcement Around The Center To Prevent Possible Cracks{1306}

1977/12/05 Use The 5P8610 Auxiliary Fitting Group To Charge Two Suspension Cylinders At The Same Time{0690,7201}