1977/06/27 Caterpillar


Correct Rebuild Kits Must Be Used For Repair Of Earlier And Later Water Pumps{1361}

Usage:


3304 and 3306 Engines in All Applications

SUPPLEMENT: 08/29/77

SERVICE MAGAZINE, JUNE 27, 1977, PAGE 1. In the article "Correct Rebuild Kits Must Be Used For Repair Of Earlier And Later Water Pumps", a wrong part number is shown in the "Parts Reference Chart" on Page 2. Below the title "Rebuild Kit" change 7N8436 to read 7N4836.

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

Reference: "Changes To Water Pump Give More Pressure", Service Magazine, July 12, 1976.

This reference article tells about the use of a new water pump impeller and housing which increase the pressure from the pump.

Because the housings and the impeller used in earlier and later water pumps can not be mixed, the correct rebuild kit must be used to make a repair. The chart that follows has the information needed to make the correct selection when ordering a repair kit.

Caterpillar Information System:

1977/06/27 More Of The Oversize (Larger) Cast Iron Seal Rings Are Available For Clutch Housings And Clutch Pistons{3169,3170}
1977/06/20 Socket For Removal And Installation Of Fuel Injection Pump Bushings is Now Stronger{0612,1253}
1977/06/20 5P7333 Tool Group Available For The Repair Of Loose Bridge Dowels On Cylinder Heads{0663,1101}
1977/06/13 New Adapter Group For Use With Fuel Injection Test Bench{0652}
1977/06/06 5P7386 Seal Driver For Hydraulic Pumps And Swing Motor{0622,5058,5070}
1977/06/06 Water Pump Has Stronger Pulley{1361}
1977/06/06 New Tool For Installation Of Tandem Drive Chains On All Series G Motor Graders{0621,4063}
1977/06/06 Improvements To Fuel Injection Pump And Governor{1286}
1977/05/30 Fabricated Tools For Assembly And Disassembly Of 7271 Marine Transmission{0621,3300}
1977/05/30 Improvements To Aftercooler Water Lines{1063,1380}
1977/05/30 Self Locking Bolts Or Hardened Washers Used In Place Of Sheet Metal Locks{3300}
1977/05/30 New Gasket Used At The Outlet Flange On Heavy-Duty Air Cleaner Group{1051}
1977/06/27 New Aftercooler Housings And Covers Have Improved Design{1063}
1977/06/27 Service Tools For Low Emission Truck Engines With EGR{0650,1059,1080}
1977/07/04 Tools To Hone (Machine) Cylinder Liners Are Available To Permit The Use Of Used Cylinder Liners With New Style Pistons{0664,1214,1216}
1977/07/04 Use New Procedure To Tighten Flywheel Housing Bolts{1157,1201}
1977/07/04 New Seal For Crankshaft{1161}
1977/07/04 New Procedure For Calibration Of 1P3060 Pyrometer Group{0653,1050}
1977/07/11 Tools To Install Crankshaft Seal And Wear Sleeve{1160,1161,0622}
1977/07/11 Some Earlier Vickers Hydraulic Pump Groups Are Not Available For Parts Service--Some Modification Is Needed To Install Replacement Pump Groups{5055}
1977/07/11 Baffle Added To Water Pump Cover To Send Coolant In Bypass Line Directly Into The Water Pump{1361}
1977/07/11 New Adjustment Pin And Valve Seal Used In Fuel Ratio Control{1278}
1977/07/11 Safety Vent Caps For Caterpillar Batteries{1401}
1977/07/11 New Component Code List For Use In The Service Information Retrieval System{0331,0374}
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