Service Repair Manual
Models
312C and 312C L Excavator
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Product: EXCAVATOR
Model: 312C L EXCAVATOR CBA
Configuration: 312C & 312C L Excavators CBA00001-01200 (MACHINE)
Disassembly and Assembly
3064 and 3066 Engines for Caterpillar Built Machines
Media Number -SENR5553-10
Publication Date -01/05/2012
Date Updated -15/05/2012
i01615293
Engine Oil Bypass Valve - Remove and Install
SMCS - 1306-010-BV
Removal Procedure
Start By:
A. Remove the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove
and Install".
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Illustration 1
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Illustration 2
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1. Remove threaded plug (1) for the engine oil bypass valve from the cylinder block (2) .
2. Remove shim (3) from the cylinder block (2) .
3. Remove spring (4) from the cylinder block (2) .
4. Remove spring seat (5) from the cylinder block (2) .
Note: Check the spring seat (5) and the valve seat for an abnormal contact pattern. Inspect the
spring (4) for weakness or damage. If necessary, replace the engine oil bypass valve with a new
part.
Note: Check the cylinder block (2) for oil passages that are clogged.
Installation Procedure
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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312C & 312C L Excavators CBA00001-01200 (MACHINE)(SEBP3146 - 49) - Docu...
2020/5/15
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Illustration 3
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Illustration 4
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1. Install spring seat (5) (not shown) and spring (4) in the cylinder block (2) .
2. Install shim (3) and threaded plug (1) in the cylinder block (2) .
3. Tighten the threaded plug (1) to a torque of 69 ± 5 N·m (51 ± 4 lb ft).
Note: Test the opening pressure for the engine o