SsangYong Musso. Manual — part 418

1F3-22 OM600 ENGINE CONTROLS

INJECTION NOZZLE TEST

Preceding Work : Removal of fuel injection nozzle

1. Fuel Injection Nozzle . . . . New : 115 - 125bar

Used : min. 100bar

A Closed Spray = good
B Stringy Spray = poor

2 Tester
3 Valve

OM600 ENGINE CONTROLS 1F3-23

Tools Required

000 589 14 27 00 Tester

Notice

When testing the injection nozzle, do not place your hand into
the spray of a nozzle. The spray will penetrate deep into the
skin and destroy the tissue.

1. Connect the fuel injection nozzle to the tester (2).

Tester 000 589 14 27 00

2. Close the valve (3) and pump 5 times strongly.

3. Chatter test :

Slowly operate the hand lever at tester (approx. 1 stroke
per second). The nozzle must spray with a gentle chattering.

4. Spray pattern test :

Operate the hand lever at tester rapidly (approx. 2~3 strokes
per second).

!

Good

The spray pattern shows closed and well atomized.

!

Poor

The spray pattern shows split, too wide and stringy.

(Repair the fuel injection nozzle)

1F3-24 OM600 ENGINE CONTROLS

5. Opening pressure test :

Open the valve (3) and slowly operate the hand lever at
tester (approx. 1 stroke / second) and measure opening
pressure.

Notice

If out of standard, repair the injection nozzle.

New Nozzle

Used Nozzle

Difference Between Nozzles

115 - 125bar

Min. 100bar

Max. 5bar

6. Leak test

Slowly operate the hand lever at the tester until get a
pressure of approx. 90bar. Maintain this pressure for more
than

20 seconds and within this period no drop of fuel should
build up at the nozzle tip.

OM600 ENGINE CONTROLS 1F3-25

INJECTION NOZZLES

1 Fuel Injection Nozzle . . . . . . . . 35-40Nm
2 Fuel Return Hose
3 Plug
4 Nozzle Washer . . . . . . . . . ... Replace
5 Fuel Injection Pipe . . . . . . . . . . 18Nm