191
ADJUSTMENT
F 276 F 277 F 278
ADJUSTMENT OF VALVE CLEA-
RANCE
Engine valve clearance is adjusted at
cold engine. The correct valve clearance
at suction and exhaust valve is 0,25 ±
0,05
mm.
Change of rocker arm movement:
Change of
rocker arm at
cylinder:
Adjusted valve at
cylinder:
1 4
2 3
3 2
4 1
ADJUSTMENT OF VALVE
CLEARANCE
At tractors Z 11641 the engine valve
clearance is adjusted at cold engine with
piston in top dead positions at the end of
compression stroke. The correct valve
clearance at suction and exhaust valve
is 0,30 mm
Change of rocker arm movement:
Change of
rocker arm at
cylinder
Adjusted valve at
cylinder:
1 6
5 2
3 4
6 1
2 5
4 3
ADJUSTMENT OF INJECTORS
The opening pressure of injectors is 22,0
- 0,8 MPa. Adjust the pressure to the
upper limit of tolerance (22,0 MPa) by
shims (1) of various thickness, which are
assembled under the spring (2). The
right position of injection nozzle (3) is
done by positioning pins on sealing
surface. Torque of fixing nut (4) is 50 -
60 Nm. Before tightening the nut press
the nozzle against spring by pushing the
nozzle against wooden surface.
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