1982/10/20 Caterpillar


New Water Pump Uses New Seal And Impeller

Usage:


3208 Engines In All Applications

Reference: "New, Improved Impeller Used In Water Pump" on Page 4 of the June 16, 1982 Engine News.

Description of Change: The reference article tells about the addition of two 6.35 mm (.250") diameter holes to water pump impellers for 3208 Engines. The two holes increase the flow of coolant around the shaft seal for longer seal service life. The article gives information for modification of existing impellers, but the part number of the new impeller was not available for release at that time. The new impeller part number is now available, and is shown in the parts chart that follows.

A new water pump group and a new rebuild kit are now available for 3208 Engines. The new pump group and kit have a new seal assembly, which uses a seal made of a carbon material. The carbon seal material will give longer service life than the phenolic (plastic) seal formerly used. In addition to the new seal, the new pump group has the new impeller with two holes between the vanes as shown in the reference article.

The new rebuild kit is released specifically for the reconditioning of water pump groups on 3208 Engines only. The former kit had parts for rebuilding pumps in other engine applications, in addition to the pumps for 3208 Engines. The new rebuild kit has all the parts needed for pump reconditioning, including the new seal and the pump mounting gasket. The new seal can be ordered separately for addition to earlier rebuild kits, if desired. During pump reconditioning, the recommendation is to install the new seal (as part of the rebuild kit), and add the two 6.35 mm (.250") diameter holes to earlier impellers which do not have the holes. See the reference article. This will make a former pump group basically the same as the new pump group.

Adaptable As: Direct replacement, as shown in the chart.

Caterpillar Information System:

1982/10/20 Engine Slobbering; New Piston And Rings Used
1982/10/20 Wider Crankshaft Gear Used
1982/10/20 Bulged Capsule-Type Fuel Nozzles
1982/10/20 Improvements Made To Marine Transmissions
1982/10/20 New Coolant Level Switch Used
1982/10/20 New Fuel Nozzle Test Sheet Available
1982/10/20 Electrical System Voltage Must Be Limited To A Maximum Of 40 Volts With Woodward Model 2301 Governors
1982/10/20 Altronic III Ignition Systems Available
1982/10/20 Indications From 6V3100 Timing Indicator Group Must Be Corrected For Some Applications
1982/10/20 Service Information For Easier Use Of The 6V3100 Timing Indicator Group
1982/10/20 Changes In Engine RPM; Governor Does Not Operate Correctly
1982/09/22 Improved Lubrication System
1982/10/20 Extended Storage Procedures
1982/10/20 Improvement To 1N4679 Control Rod Assembly Increases Range Of Adjustment For Rack
1982/10/20 List Of Service Publications
1982/10/20 New Connecting Rod And Main Bearings Have Thicker Layer Of Surface Material
1982/10/20 Reconditioning Of Oil Pump Covers
1982/10/20 Improved Valve Cover Seal
1982/10/20 Planned Engine Repairs
1982/10/20 Fuel In The Cooling System Or Coolant In The Engine Oil Can Result From Cracked Fuel Nozzle Adapter
1982/10/20 New Main And Connecting Rod Bearings Have A Thicker Layer Of Lead-Tin Overlay (Surface Material)
1982/10/20 New Head Gasket Improves Seal Between Block And Liner Flange
1982/10/20 FT1698 Driver Can Be Used For Reconditioning Of Governor Housing
1982/10/20 New Fasteners Used For Fuel Injection Lines
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