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13.1.10) Fuel pump
11,75 8
M5
M4
Pic. 83
ø38
ø13,3
P1
ø12
ø8
P2
ø9
00045
Page
Date
136
1997 02 01
See Pic. 83/84 and 85.
The fuel pumps are maintenance-free and need no adjustment or servicing.
Visually check the fuel pump.
ATTENTION: The fuel pump must not be disassembled, there are no
spare parts available. If necessary, renew the complete fuel
pump.
In case of troubles, check function via the fuel supply and/or current input.
Flow rate / pressure: See diagram Pic. 84.
l/h
120
110
100
90
80
70
60
50
40
30
20
10
0
The diagram shows the flow rate of the electric fuel pump in
relation to pressure.
Current input / pressure: See diagram Pic. 85.
Take care of the following:
The diagrams show the minimum limit curve at nominal voltage (12V DC)
of the pump.
Pressure indications in Pic. 84 and 85 refer to boost pressure.
Pressure and suction height are "ZERO".
The graph applies only to a seasoned pump: Run-in period approx. 30
minutes.
NOTE:
The pump may increase its performance by approx. 20 %
after running-in.
Main
914 F
0
250
500
750
00046
P= P2 – P1
∆
3,0 A
2,5
2,0
1,5
0
250
500
Reference
1750
1000
1250
1500
Pic. 85
00047
750
1000
1250 hPa
Modification no.
P
Ð
2000 hPa
Pic. 84
- 0 -
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Troubleshooting
