Perkins 4012TESI Series, Руководство пользователя, Страница: 44 / 57

MAINTENANCE PROCEDURES
40 4012/16 Gas, February 1998
EQUALISING THE BRIDGE PIECES
Having rotated the engine to the correct
position, check that the inlet and exhaust
rockers have clearance before continuing
with the next operation. Loosen the lock nut
(1) on each bridge piece, screw the adjuster
(2) out until the fixed side of the bridge piece
rests on its valve, hold the top edge down
with one hand then screw the adjuster down
until you feel it touch the valve, thereby
equalising valve lift.
Tighten the lock nut
without moving the adjuster (see Fig. 32 ).
SETTING VALVE CLEARANCE
With both bridge pieces equalised check the
valve clearance of 0.4 mm (0.016") inlet and
exhaust using a feeler gauge (1). If adjustment
is required loosen the lock nut (2) and using
the adjuster screw (3) set the clearance.
Tighten the lock nut without moving the
adjuster (see
Fig. 33 ). The feeler gauge
should be a slide fit between the rocker and
bridge piece thereby giving the correct
clearance. Refit the rocker cover with a new
gasket.
DISCONNECT
BATTERIES OR ANY
OTHER MEANS OF STARTING THE
ENGINE.
WARNING
Fig. 32
1
2
Fig. 33
1
2
3
ENGINE 4012TESI
T.D.C.
VALVES ROCKING ON
CYLINDER NO.
SET BRIDGE PIECE
AND VALVE CLEARANCE
ON CYLINDER NO.
A1 & A6 A6 A1
B1 & B6 B1 B6
A2 & A5 A2 A5
B2 & B5 B5 B2
A3 & A4 A4 A3
B3 & B4 B3 B4
A1 & A6 A1 A6
B1 & B6 B6 B1
A2 & A5 A5 A2
B2 & B5 B2 B5
A3 & A4 A3 A4
B3 & B4 B4 B3