Yanmar 6CXM-GTE2 Service Manual download pdf (Page 96)

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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

Ǿ6.35/1.8  600mm

Minimum bending radius 25 (0.98)

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Yanmar 6CXM-GTE2 Service Manual Page 96