Jacobsen SXG323, Service Manual

Page: 37 / 230

SERVICE MANUAL FOR SXG323&326
36
•
Adjustment:
When the deflection is more than specified, ten-
sion the belt properly by moving the alternator.
2.3. INSPECTION AND ADJUSTMENT OF
VALVE CLEARANCES
2EMOVE THE CYLINDER HEAD COVER
4URN THE CRANKSHAFT BY HAND SO THAT THE
PISTON IN .O CYLINDER R EACHES AT 4$#
ALIGN THE 4$# NOTCH IN THE CRANKSHAFT
PULLEY WITH THE P
ro
JECTION ON THE GEAR
CASE
Note:
When it is difficult to distinguish between TDC in
compression stroke and TDC in exhaust stroke,
use height difference among the push rods as a
criterion for judgment. When the heights of the
push rods (No.1, 2,3, and 6 viewed from the fan)
are about 5 mm lower than those of No.4 and 5,
the piston in No.1 cylinder is at TDC in compres-
sion stroke.
)NSERT A FEELER GAUGE OF A SPECIFIED THICK
NESS AND ADJUST THE CLEARANCE WITH THE
ADJUSTING SCREW
Specified valve clearance (cold):
2.4. INSPECTION AND ADJUSTMENT OF
NOZZLE OPENING PRESSURE AND
INJECTION TIMING
!DJUSTMENT OF THE VALVE OPENING PRESSURE
OF THE INJECTION NOZZLES
• Measure the pressure of initial fuel injection on a
nozzle tester.
3PECIFIED DEFLECTION MM
)NTAKE
%XHAUST
MM
MM
3PECIFIED PRESSURE
%%
KGCM
&IG
&IG
&IG
&IG