Usage:
Introduction
FLOW OF OIL THROUGH OIL FILTER ASSEMBLY
1-Inlet end cover. 2-Spring. 3-Bypass housing. 4-Valve. 5-Elements (four). 6-Housing. 7-Outlet end cover. 8-Inlet port. 9-Bypass dump port. 10-Outlet port.
Unfiltered oil is delivered by the oil pump through the oil cooler to oil filter inlet port (8). The oil is filtered as it passes through filter elements (5). The filtered oil passes along the center of the elements, through openings in outlet end cover (7) and out outlet port (10) to the engine oil distribution manifold. The force of spring (2), acting against bypass housing (3), holds elements (5) securely, thus forming a seal between the elements and between the end elements and adjoining parts.
If the oil filter elements should become restricted, excessive pressure will unseat valve (4) in the bypass housing. This will allow the oil to bypass the elements, through dump ports (9), and flow directly through the center of the elements and out port (10).
Removal And Installation
Drain the oil filter assembly by removing drain plugs (1).
NOTE: On engines equipped with an expansion tank, remove the coolant tube connecting the base of the expansion tank and the inlet of the water pump.
To remove the rear filter on D399 engines, remove the front fuel filter housing mounting brackets.
PREPARING TO REMOVE OIL FILTER ASSEMBLY (D399 Engine Illustrated)
1-Drain plugs. 2-Bolts (four). 3-Inlet elbow and bracket assembly. 4-Outlet elbow and bracket assembly.
Replace damaged gaskets and O-ring seals.
Disassembly And Assembly
1. Drain the oil filter assembly by removing the plug located in end cover (1) and the plug located in the underside of housing.
2. Remove inlet end cover (1) to gain access to the filter elements (2).
PREPARING TO REMOVE FILTER ELEMENTS (D399 Engine Illustrated)
1-Inlet end cover. 2-Filter elements (four).
NOTE: Remove the outlet elbow and bracket assembly from under the left side of the oil filter assembly before removing the outlet end cover. This will minimize the possibility of unfiltered oil and sludge from entering the outlet port.
3. Remove the outlet end cover.
PREPARING TO DISASSEMBLE BYPASS VALVE
3-Pin. 4-Housing. 5-Spring. 6-Retaining ring. 7-Valve. 8-Spring. 9-Guide.
4. Inspect all gaskets. Install new gaskets if necessary.
Turbocharger Lubrication Valve (D398 and D379 Engines)
Removal-Earlier Engines
The turbocharger lubrication valve body can be removed from the engine without removing the lines.
1. Remove bolts (1) which secure adapter (3) and body (2) to inspection cover (4).
2. Pull the adapter far enough away from the inspection cover to allow the body to be removed.
3. Slide the body out from between the adapter and inspection cover using care not to damage the gaskets.
4. Install new parts if necessary.
PREPARING TO REMOVE TURBOCHARGER LUBRICATION VALVE (Earlier Engines)
1-Bolts (four). 2-Body. 3-Adapter. 4-Inspection cover.
Removal-Later Engines
1. Remove bolts (1) which secure adapter (3) and body (2) to aftercooler front mounting channel.
2. Pull body and cover far enough away from the adapter to allow the body to be removed.
3. Slide the body out from between the adapter and cover using care not to damage the gaskets.
4. Install new parts if necessary.
PREPARING TO REMOVE TURBOCHARGER LUBRICATION VALVE (Later Engines)
1-Bolts (four). 2-Body. 3-Adapter.
Disassembly
VALVE BODY DISASSEMBLY
2-Body. 5-Spring. 6-Plunger.