Quantcast VALVE AND INJECTOR OPERATING MECHANISM - EXHAUST VALVES MAINTENANCE INSTRUCTIONS. - TM-55-1905-220-14-40439

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TM 55-1905-220-14-4
3-33. VALVE AND INJECTOR OPERATING MECHANISM - EXHAUST VALVES
MAINTENANCE INSTRUCTIONS.
a.
The valve and injector operating mechanism is located on the cylinder head.
b.  Several operations may be performed on the valve and injector operating mechanism without removing
the cylinder head from the block. These operations are:
(1)
Rocker arm removal and installation. (Refer to paragraph 3-33.1).
(2)
Rocker arm shaft or shaft bracket removal and installation. (Refer to paragraph 3-33.1).
(3)
Fuel injector removal and installation. (Refer to paragraph 3-15).
c.  It is also possible to remove or replace a push rod, push rod spring, spring seats or cam follower
without removing the cylinder head. However, these parts are more easily changed from the lower side of the
cylinder head when the head is off the engine. (Refer to paragraph 3-33.1).
d.  Several operations may.be performed on the exhaust valve mechanism without removing the cylinder
head from the block. These operations are:
(1)
Valve clearance adjustment. (Refer to paragraph 3-33.2).
(2)
Exhaust valve bridge adjustment. (Refer to paragraph 3-33.2).
(3)
Valve spring removal and installation. (Refer to paragraph 3-33.2).
(4)
Exhaust valve bridge or bridge guide removal and installation. (Refer to paragraph 3-33.2).
e.
In addition, the following operations require removal of the cylinder head. These operations are:
(1)
Remove and install exhaust valves. (Refer to paragraph 3-33.2).
(2)
Remove and install exhaust valve guides. (Refer to paragraph 3-33.2).
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