jcb 100C-1, Руководство по обслуживанию

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15 - Engine
30 - Valve
00 - General
15 - 107 9813/2700-2 15 - 107
00 - General
Introduction .................................................. 15-107
Technical Data ............................................. 15-108
Component Identification ............................. 15-109
Operation ..................................................... 15-111
Adjust .......................................................... 15-113
Calibrate ...................................................... 15-113
Remove and Install ..................................... 15-115
Introduction
The valve train system opens and closes the
valves with correct timing in relation to the piston
movements.
Each push rod has one end in a valve tappet and
the other end under a rocker arm, or as applicable.
Hydraulic tappets are used which automatically
adjust the clearance between the valve and push
rods.
The valves extend through the cylinder head. The
valves are made from a special metal to provide a
long service life. Damaged or worn valves cannot be
lapped or reground and must be replaced with new
ones. Each valve stem has an oil seal.
The Valve seat inserts are pressed into the cylinder
head. The seat inserts are also made from a special
metal to provide for a long service life. Damaged or
worn seat inserts can be removed and replaced with
new ones.