Checking fuel pump relay with electronic rpm regulation (breakaway)
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07.3—165 Checking fuel pump relay with electronic rpm regulation (breakaway)
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Breakaway speeds
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Engine
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MB-part no.
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Breakaway speed 1/min
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Speed signal
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Without decel shutoff
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Standard version and
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starting model year 1981
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110.984 110.986 110.987
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001 545 07 05 001 545 14 05
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6650 ± 50
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With decel shutoff
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Standard version
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Conventional testers
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Voltmeter, revolution counter
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07.3.2 lla-165/1 F2
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Layout fuel pump relay
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Model 107
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Lefthand steering
At the right inside vehicle behind glove box. For repairs, remove glove box.
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Righthand steering
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Model 107
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At the right inside vehicle above pedals.
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Model 123
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Lefthand steering
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At the left on wheel house.
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Model 123
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Righthand steering
At the left inside vehicle behind side panelling. Remove cover for repairs.
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Model 123
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Model 126
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Lefthand and righthand steering
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At the left in fuse box.
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Model 126
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07.3.2 Ma—165/2 F2
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A. Prior to September 1981
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Testing
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Test condition
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Battery charged to min. 60 %.
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1 Fuel pump relay
2 Fuel pump
3 Warm-up compensator
4 TSZ (transistorized coil ignition) switching unit
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07.3.2. Ma—165/3 F 2
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07.3.2 I la—165/4 F2
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07.3.2 lla-165/5
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F 2
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07.3.2 lla-165/6 F2
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If engine is not regulated (breakaway) when attaining max. speed of engine, replace fuel pump relay.
The respective breakaway speed is punched into fuel pump relay.
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End of test
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B. Starting September 1981
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Wiring diagram model 123
1 Fuel pump relay
2 Thermo time switch
3 Cold starting valve
4 Warm-up compensator
5 Switchover valve
6 Microswitch
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a To output starter lockout and backup lamp switch
b Transmitter mechanical tachometer
c Fuel pump
d Fuse 12 terminal 15 access
e Refrigerant compressor
f Cable connector engine terminal 30
g Cable connector terminal TD
h Cable connector engine terminal 50
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Color code bl =blue br = brown ge = yellow gn = green gr =gray rs =pink rt = red sw = black vi = purple ws = white
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07.3.2 Ma—165/7 F2
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Wiring diagram model 107,
1 Fuel pump relay
2 Thermo time switch
3 Cold starting valve
4 Warm-up regulator
5 Switchover valve
6 Microswitch
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126
a Cable connector engine terminal 50
b Transmitter electronic tachometer
c Fuel pump
d Fuse 1 4 terminal 1 5 access
e Refrigerant compressor
f Cable connector terminal 30
g Cable connector terminal TD
h Cable connector terminal 50
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Color code bl =blue br = brown ge = yellow gn = green gr =gray rs = pink rt = red sw = black vi = purple ws = white
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07.3.2 Ma—165/8 F2
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07.3.2 lla-165/9 F2
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07.3.2 Ma—165/10 F2
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If engine is not regulated (breakaway) when engine max. speed is attained, replace fuel pump relay.
The respective breakaway speed is punched into fuel pump relay.
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07.3.2 Ma —165/11
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F 2
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