TM 9-4310-394-13
(7)
Refer to Figure 5-6. Remove rocker arm support bolt (1).
(8)
Remove rocker arm support (2) with intake and exhaust valve rocker arms (3 and 4) attached.
(9)
Remove two valve stem caps (5).
(11)
Compress valve spring (6), and remove retainer keeper (7) and retainer (8) from top of valve spring (6).
(12)
Remove valve spring (6).
(13)
Remove valve spring washer (9).
(14)
Remove valves (10 and 11) from cylinder head.
(15)
Remove valve stem seals (12) from cylinder head and discard.
b.
Inspection.
WARNING
Death or serious injury could occur if compressed air is directed against skin. Do
not use compressed air for cleaning or drying unless the pressure is/has been
reduced to 30 PSI or less. When working with compressed air, always use eye
protection and any other protective equipment.
CAUTION
Do not confuse the intake and exhaust valve stems.
The intake/exhaust valve guides are provided with a valve stem seal. Valve stem
seals cannot be reused and must be replaced with new ones.
When inserting the intake and exhaust valve stems, apply lube oil to the valve
stems.
(1)
Clean cylinder head and valves with a clean cloth dampened with diesel fuel. Use wire brush where
necessary and dry with compressed air.
(2)
Inspect cylinder head for cracks, corrosion, or excessive heat damage.
(3)
Inspect valve heads and valve stems for cracks, pitting, scratches, warpage, or any other damage.
(4)
Refer to Figure 5-7. Check that each valve stem diameter is more than 0.2126 inch (5.40 mm).
5-15
