Table of Contents
Advertisement
Manual
F 240
1. Connecting
2. Checking of the
opening pressure
3. Checking needle
seal
4. Checking fuel jet
Ver. 01
FUEL INJECTOR
17C
17C
CHECKING
CHECKING
Before starting work, please consult:
-- chapter 2, " BACKGROUND INFORMATION" ;
-- chapter 3, "TECHNICAL DATA"
Connecting the nozzle to the test pump (Tool C):
1. 1. Clean the fuel injector externally with pure gasoil.
If the fuel injector is out of use only during a very short time, gasoil can be
used tor testing. However, if the fuel injector is out of use during a prolonged
period of time, it is recommended that an oxidation--resistant calibration fluid
is used.
Even slight oxidation can cause the nozzle needle to stick.
1. 2. Connect the fuel injector to the
test pump.
Check that the tank is full of
clean gas oil or calibration fluid.
1. 3. Close
the
manometer and pump the fuel
injector through with a few
strong strokes.
In this way all important parts will
come into contact with the test oil.
Open the valve of the manometer a
quarter turn. Push the lever of the test
pump slowly downwards and slowly bring
the fuel to a pressure where the nozzle
opens.
Note the opening pressure of the nozzle.
For values of the opening pressure, see
chapter 3 Technical Data.
If the opening pressure is lower or higher
than the prescribed pressure, see section
17F.
Open the valve of the manometer. Thoroughly dry the underside of the nozzle tip.
Slowly bring the nozzle to a pressure, which is 10% lower than the pressure mentioned
in chapter 3 Technical Data.
The nozzle needle is completely closed, when no drop is formed on the nozzle tip
within 10 seconds.
Make sure that during testing no oil leaks along the side of the fuel injector!
Avoid putting your hands in the fuel jet!
Close the valve of the manometer.
Push the lever downwards once, with a short quick movement.
The fuel jets must be finely atomized, in equal form, under the same angle and equally
divided over the circumference!
The fuel jet can be checked by placing a piece of paper under the nozzle tip at a
distance of about 10 mm.
valve
of
the
17 - - 8
Advertisement
Table of Contents
