PUMP & MOTOR GP-REFUELING 2291859 - Caterpillar

Illustration 1. Location of new components on 8N1928 and 8N5853 Engine Oil Pump Groups cover assemblies.
Illustration 2. Location of new components on 8N1928 and 8N5853 Engine Oil Pump Groups cover assemblies.Adaptable As: The improved 8N1928 Engine Oil Pump Group is in effect with D348 Vehicular Engine 98S3172. The improved 8N5853 Engine Oil Pump is in effect with D348 Vehicular Engine 98S3206. The additions to the pump groups are shown in the chart. A tapped hole has been added to the 1N3817 Cover Assembly used on 8N1928 Engine Oil Pump Group and the 1N3771 Cover Assembly used on 8N5853 Engine Oil Pump Group.
The changed covers and new components are adaptable to all earlier 8N5853 and 8N1928 Engine Oil Pump Groups. The new bolt, spacer, washer and changed 1N3817 Cover Assembly can also be used on the 2N3834, 6N5723, 1W2456 Engine Oil Pump Group used on earlier D346, D348 and D349 Engines.
The cover assemblies used in the engine oil pump groups on earlier D346, D348 and D349 Engines can be drilled and tapped for the installation of the bolt, spacer and washer as shown in Illustrations 3 and 4. The tapped hole is located at the midpoint of the center line between the bearing bores.
Illustration 3. Location of tapped hole.
Illustration 4. Location and dimensions for tapped hole.