Yanmar 6CXM-GTE, Service Manual

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3.11.10 Adjustment of fuel injection pump
Adjust the fuel injection pump after completing reassembly.
The pump itself must be readjusted with a special pump
tester when you have replaced major parts such as the
plunger assembly, tappet assembly, fuel camshaft, etc.
(1) Preparation
Prepare for adjustment as follows.
1) Adjusting nozzle assembly and data sheet of injection
start pressure.
2) Adjusting injection pipe.
mm (in)
3) Mount the fuel injection pump on the pump tester plat-
form.
4) Fill the pump and governor with clean lube oil.
oil capacity : pump 250 cc
governor 300 cc
5) Connect the fuel oil pipes and operate the pump tester
to purge the air in the line.
6) Set the oil feed pressure from the pump tester to the
injection pump at the pressure specified in the separate
service data sheet.
(2) Adjustment of pre-stroke
1) Remove the delivery valve holder of No.6 cylinder.
Remove the delivery valve spring and delivery valve.
2) Screw the pre-stroke measuring device in the screw
hole on the top of the barrel.
3) Set the control rack to the full load position.
Find the bottom dead center of the plunger while rotat-
ing the pump by hand, and set the dial indicator to
zero.
Adjusting nozzle type
See (7) Injection adjustment
standard
Injection start pressure
Inner dia. / outer dia. x length Ǿ
6.35/1.8
˜
600mm
Minimum bending radius 25 (0.98)