Yanmar 6CXM-GTE2 Service Manual download pdf (Page 98)

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(6) Measurement and adjustment of injection volume

The injection volume is determined by the fuel injection

pump rpm and rack position. Check and adjust to bring it

to the specified value.

1) Measurement of injection volume.

a) Set the pump rpm, rack position and measuring

stroke to the specified value and measure.

b) Measure the injection volume at the standard stroke,

and adjust as follows if it is not within the specified

value.

2) Adjustment of injection volume

a) Loosen the two nuts on the plunger barrel flange,

and turn the plunger barrel to the right or left.

b) Measure the injection volume of each cylinder.

Repeat this process until the injection volume of

every cylinder is within the specified limit.

c) After completing the measurements, retighten the

nuts of plunger barrel flange.

d) If match mark is not aligned, make a new match

mark.

(7) Injection adjustment standard (on engine)

Adjustment procedures

1) Set the initial rack position of the boost compensator

at R=9.0 mm.

(air pressure in the boost air pipe is 0 MPa (0 kgf/cm

Fuel limiter released, regulator at FULL position)

2) Check the limit rack position of the boost compensator.

R>15 [The pressure in the boost compensator piping

line increased : 0

0.2 MPa (0

2 kgf/cm

)]

3) Make the following adjustment and air leakage check

of the boost compensator piping under the air pressure

of 0.2 MPa (2 kgf/cm

a) Adjustment of rated injection q'ty

b)Check of injection q'ty at idling condition. ㅜ

c) Setting of reversed "Angleich" reduced injection

q'ty.

ㅝ

d) Check of injection q'ty at reversed "Angleich" range.

ޓ㧘

e) Check of rev. speed to start reversed "Angleich".

f) Setting of high idle injection q’ty. ㅠ

g)Check of regulation

h)Check of injection stop.

i) Check of injection stop when the stop lever is oper-

ated.

j) Check and set the injection q’ty at start.

ㅥ

Pump rpm See separate service data

Pump rotation direction View from drive side

Rack indicator scale See separate service data

Measuring stroke

See Standard Adjustment Value

Table.

Specified injection volume

at standard rack position

Non-uniformity of

cylinders

Tightening torque

39 㨪 49 N࡮m

(4.0 㨪 5.0 kgf࡮m)

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Yanmar 6CXM-GTE2 Service Manual Page 98

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