Checking delivery quantity of fuel metering pump

AR83.70-D-1178A

Checking delivery quantity of fuel metering pump

4.11.96



Removal

 Danger!

Fuel vapors present an explosion hazard. Combustion gases are toxic when inhaled. Heater can cause severe burns during and after operation

Do not start up or operate stationary heaters or engines with heater boosters in closed rooms or in the vicinity of service stations. Allow heater to cool off after operation and wear protective gloves.

AS83.70-Z-0002-01A

 Danger!

Fuel vapors present an explosion hazard. Fuel vapors are toxic when inhaled or absorbed. Contact with fuel can cause eye and skin injury.

Fire, open lights and smoking prohibited.
Fill and store fuel only in containers intended for this purpose and marked accordingly.

Wear protective clothing when handling fuel.

AS47.00-Z-0001-01A



Prerequisites/instructions on checking fuel metering pump delivery quantity

AH83.70-N-0002-01A

1

Remove cover (1) together with gasket (2)

2

Clean fuel screen in intake fitting on fuel metering pump

AR83.70-D-5653A

3

Pull fuel line (9) off of heater (10) and insert end of fuel line into graduate (7)

4

Unscrew mounting nut for holding glow plug cable (3) on glow plug

5

Connect voltmeter (8) to control
module (4)

 Test clip (6) to measuring point (+) terminal 3 and test clip (5) to measuring point (-), terminal 4.

*WH58.30-Z-1001-09A

Bleeding

6

Switch on heater (10)

 Do not allow glow plug cable to touch ground.

7

Wait until blower starts running, then disconnect glow plug cable (3) from glow plug

 Do not allow glow plug cable to touch ground.

 Fuel begins to flow after approx.
45 seconds.
To bleed fuel line allow heater to run until fuel flows out uniformly without bubbles.

8

Switch off heater (10)

9

Empty graduate and insert end of fuel line (9) into graduate (7)

10

Attach glow plug cable (3) to glow plug

Measuring

 The fuel is switched off automatically after 90 sec. The quantity of fuel supplied within this 90 second period serves as the test value.

11

Switch on heater (10)

 Do not allow glow plug cable to touch ground.

12

Wait until blower starts running, then disconnect glow plug cable (3) from glow plug

 Do not allow glow plug cable to touch ground.

 Fuel begins to flow after approx.
45 seconds.
When measuring hold graduate at height of glow plug to avoid pressure or vacuum in fuel line.

13

As soon as fuel starts to flow, read off voltage on voltmeter

14

Wait until fuel flow is shut off automatically

15

Switch off heater (10)

16

Evaluate delivery quantity from fuel metering pump

If required values are not reached 

AR83.70-D-1178-02A

replace fuel metering pump

AR83.70-D-5652A



Installation

17

Disconnect voltmeter (8) from control module (4)

18

Fasten glow plug cable (3) to glow plug with mounting nut

19

Attach fuel line (9) to heater (10)

20

Install cover (1) together with gasket (2)

 Check gasket for damage, replace if necessary.

Number

Designation

WH58.30-Z-1001-09A

Multimeter