D300D ARTICULATED TRUCK 5MG00001-UP (MACHINE)(SEBP8503 - 04) - Syste...
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Product: ARTICULATED TRUCK
Model: D300D ARTICULATED TRUCK 5MG
Configuration: D300D ARTICULATED TRUCK 5MG00001-UP (MACHINE)
Service Magazine
1982/11/01
Media Number -SEBD1241-00 Publication Date -01/11/1982 Date Updated -01/11/1982
New Crankshaft Assemblies{1202,1204,1206,1207,1212}
SMCS - 1202; 1204; 1206; 1207; 1212
All 3304 And 3306 Engines
Description of Change: The above engines now have new crankshaft assemblies with wider
crankshaft gears. The wider crankshaft gears are used with engine front gear trains that have wider
gears.
Adaptable To: The new 2W7960 and 2W7458 Crankshaft Assemblies are in effect with the serial
numbers shown in the chart. These crankshaft assemblies use a wider 1W4405 Crankshaft Gear. The
former 4N7692 and 4N7693 Crankshaft Assemblies had a narrower 7N4525 Crankshaft Gear.
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D300D ARTICULATED TRUCK 5MG00001-UP (MACHINE)(SEBP8503 - 04) - Syste... Page 2 of 5
3304 and 3306 Vehicular Engines and most 3306 Truck Engines use a 7N9589 Trunnion Group
instead of a crankshaft seal adapter. If desired, a new crankshaft assembly can be used on all earlier
engines with the 7N9589 Trunnion Group.
All 3304 and 3306 Industrial and Marine, Natural Gas Engines and a few truck engines, use either a
1W4506 or a 3N1463 Crankshaft Seal Adapter. A new crankshaft assembly can be used in all 3304
and 3306 Engines with the 1W4506 Crankshaft Seal Adapter.
A new crankshaft assembly can also be used in a 3304 or 3306 Engine with a 3N1463 Crankshaft Seal
Adapter, if the 3N1463 Crankshaft Seal Adapter is replaced with a 1W4506 Crankshaft Seal Adapter.
The chart that follows gives the in effect Serial Numbers for the 1W4506 Crankshaft Seal Adapters.
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NOTICE
It is important to use the correct crankshaft and crankshaft gear, as
shown in this article. Use of the wrong parts can result in serious
engine damage.
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Illustration 1. New 1W4405 Crankshaft Gear.
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Illustration 2. Former 7N4525 Crankshaft Gear.
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