Perkins 4012TESI Series, Руководство пользователя, Страница: 43 / 57

MAINTENANCE PROCEDURES
4012/16 Gas, February 1998 39
EQUALISING BRIDGE PIECES AND
SETTING VALVE CLEARANCES
NOTE: The bridge pieces must be set before
attempting to set the valve clearances.
Remove the 4 screws (1) from the rocker
cover (2), lift off the cover peel off and throw
away the old gasket (3) Pull the spark plug
lead tube (4) from the spark plug bush (see
Fig. 29 ).
To equalise the bridge pieces the
appropriate valves must be rocking, use the
table below.
In order that the engine may be rotated
while the batteries are disconnected a
special cranking device (SE253) can be
fitted to the spare starter motor hole in the
flywheel housing (see
Fig. 30 ). Using a
socket and ratchet wrench press against the
spring loaded bolt head until the pinion
engages with the flywheel gear then crank
the engine to the desired position.
If the valves required to be rocking are
closed rotate the engine one revolution
which will bring these valves to the rocking
position.
The flywheel housing has an
inspection hole directly below the
turbocharger through which the flywheel
markings may be seen to line up with the
pointer set in the flywheel housing (see
Fig.
31 ).
The flywheel is marked: T.D.C. (Top Dead
Centre)
4012TESI 4016TESI
A1-A6 A1-A8
A5-A2 A3-A6
A3-A4 A7-A2
B1-B6 A5-A4
B5-B2 B1-B8
B3-B4 B3-B6
B7-B2
B5-B4
DISCONNECT
BATTERIES OR ANY
OTHER MEANS OF STARTING.
WARNING
Fig. 29
1
2
3
4
Fig. 30
1
2
Fig. 31