TM 55-2815-574-24
0129
REMOVAL
1.
Remove retaining plug (Figure 1, Item 2) from the engine oil cooler adapter (Figure 1, Item 5).
2.
Remove gasket (Figure 1, Item 1) from retaining plug (Figure 1, Item 2) and discard gasket.
3.
Remove bypass valve spring (Figure 1, Item 3) from the engine oil cooler adapter (Figure 1, Item 5) valve
cavity.
4.
Remove bypass valve (Figure 1, Item 4) from the engine oil cooler adapter (Figure 1, Item 5) valve cavity.
Figure 1. Oil Cooler Adapter.
END OF TASK
CLEAN
1. Clean oil bypass valve (Figure 1, Item 4) and bypass valve spring (Figure 1, Item 3) with cleaning compound.
2. Dry with compressed air not to exceed 40 PSI (279.79 kPa) air pressure.
INSPECT
1. Inspect spring bypass valve spring (Figure 1, Item 3) for wear. Replace defective part.
NOTE
The bypass valve spring has a free length of approximately 2 1/64th in.(5.11 cm).
2. Using spring tester, apply a force of 12 lbs (5.45 kg) to the bypass valve spring.
3. Check length of bypass valve spring (Figure 1, Item 3) for a minimum allowable length of 1.793 in. (4.55 cm).
Replace defective part.
4. Inspect bypass valve (Figure 1, Item 4) for pitting and corrosion. Replace defective part.
5. Inspect retaining plug (Figure 1, Item 2) for stripped or damaged threads. Replace defective part.