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SECTION 1F3
OM600 ENGINE CONTROLS
Specifications . . . . . . . . . . . . . . . . . . . . . . . 1F3-1Fastener Tightening Specifications . . . . . . . . 1F3-1
Maintenance and Repair . . . . . . . . . . . . . . 1F3-2
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . 1F3-2
Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . 1F3-2
Fuel Injection Pump Coding . . . . . . . . . . . . . 1F3-3
Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F3-4
Vacuum Control System Test . . . . . . . . . . . . 1F3-5
Vacuum Pump(Sectional View) . . . . . . . . . . 1F3-10
Vacuum Pump Test . . . . . . . . . . . . . . . . . . . 1F3-11
Vacuum Pump . . . . . . . . . . . . . . . . . . . . . . 1F3-13
Vacuum Unit Replacement . . . . . . . . . . . . . 1F3-15Idle Speed Adjustment . . . . . . . . . . . . . . . .
1F3-16
Fuel Pump Test . . . . . . . . . . . . . . . . . . . . . . 1F3-18
Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . 1F3-21
Injection Nozzle Test . . . . . . . . . . . . . . . . . . 1F3-22
Injection Nozzles . . . . . . . . . . . . . . . . . . . . . 1F3-25
Injection Nozzle Repair . . . . . . . . . . . . . . . . 1F3-27
Removal and Installation of Injection Timing Device . . . . . . . . . . . . . . 1F3-30
Injection Timing Device . . . . . . . . . . . . . . . . 1F3-35
Start of Delivery Test (Position Sensor, RIV Method) . . . . . . . . . 1F3-37
Fuel Injection Pump . . . . . . . . . . . . . . . . . . 1F3-46
TABLE OF CONTENTS
Caution: Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwisenoted.
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Application
Fuel Tank Mounting Nut Fuel Pump Pressure Line Fuel Injection NozzleFuel Injection Pipe
Nozzle Tensioning NutScrew Plug Left-Hand Thread Bolt
N· m
28 - 47 13
35 - 40 18 8030 46
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OM600 ENGINE CONTROLS 1F3-3
FUEL INJECTION PUMP CODING Model Code
PES 4M 55C 320 RS 167 PES 5M 55C 320 RS 168
Fuel Injection Pump Code Example) PES 5M 55C 320 RS 168
P Pump
E Self-Driven
S End Flange Mounting
5 Number of Cylinders (5EA)
M Pump Size
55 Element Diameter
C Modification Letter
320 Assembly Number
R Direction of Rotation (clockwise)
S188 Special Version
RSF Governor
R Governor
S Coil Spring
F Drive Governor
Component Location
1. Fuel Injection Pump
2. Vacuum Unit (Stop Unit)
3. Control Lever
4. PLA Vacuum Unit (Idle Speed Adjustment)
5. Governor
6. Fuel Pump
OM661 LA Engine OM662 LA Engine
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OM600 ENGINE CONTROLS 1F3-5
VACUUM CONTROL SYSTEM TEST
2 Engine Cut-Off Valve (Ignition Key Switch)
3 Auto-locking Hub Solenoid Valve
4 Engine Stop Valve Unit
5 PLA Vacuum Unit (Idle Speed Adjustment)
6 Engine
7 Vacuum Pump830
° Thermovalve
9 Fuel Injection Pump
10 Filter with Restriction
11 Check V alve
12 Modulating Pressure Line (Automatic T/M)
Test Data
Idle Speed Increase Permissible Pressure Drop of System At least 100 rpm at approx. 500mbr
400 - 500mbar approx. 1 min.
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1F3-16 OM600 ENGINE CONTROLSIdle Speed
750 - 850 rpm 720 - 820 rpm
EngineOM661LA EngineOM662LA Engine
Tools Required 667 589 00 21 00 TDC Pulse Generato
Commercial Tool
IDLE SPEED ADJUSTMENT Service Data
e.g. Bosch, MOT 001.03
Sun, DIT 9000
Digital Tester
Adjustment Procedure
1. Connect the digital tester (1) and TDC pulse sender unit
(11).
2. Run the engine and warm up the coolant to 60~80 °C.
TDC pulse generator 667 589 02 21 00
3. Disconnect the vacuum hose (4) from the PLA unit to check idle speed with tester.
4. Check idle speed with tester.
Notice
To adjust idle speed, loosen the locking nut (6) of PLA unit.
OM 661LA Engine 750 - 850rpm
OM 662LA Engine
720 - 820rpm
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OM600 ENGINE CONTROLS 1F3-17
6. After adjustment, tighten the locking nut and place theposition marking with different color of paint. Notice If there are no changes in idle speed with PLA unit
adjustment, perform the service at a BOSCH Service Center.
7. Connect the vacuum pump to the PLA vacuum unit and build up vacuum approx. 500mbar. If engine rpm increases by approx. 100rpm, It is normal.
Vacuum Pump 001 589 73 21 00
8. Connect the vacuum line (4).
9. Switch on all ancillaries and check the idle speed.
5. Ensure not to damage the idle spring in the governor and adjust idle speed by turning the PLA unit (5) slowly. Notice Do not rotate the PLA unit over ½ turn from the position
marking. If do, idle spring in the governor will be severely damaged. Clockwise
Counterclockwise
RPM Decrease RPM Increase
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OM600 ENGINE CONTROLS 1F3-21
FUEL PUMP
1 Fuel Injection Pump
2 Pressure Line............................................ 13Nm
3 Suction Line
4 Hose Clip ............................................... Replace 5 Gasket ................................................... Replace
6 Spring Lock Washer
7 Hexagon Nuts
8 Fuel Pump
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1F3-30 OM600 ENGINE CONTROLS
REMOVAL AND INSTALLATION OF INJECTION TIMING DEVICE Preceding Work : Removal of vacuum pump
1 Cylinder Head Cover
2 Bolt ............................................................ 10Nm
3 Gasket ................................................... Replace
4 Fuel Injection Pump
5 Seal ....................................................... Replace
6 Screw Plug ................................................. 30Nm
7 Oil Pan
8 Locking Pin
9 Injection Timing Device 10 Washer
11 Bolt (Left-Hand Thread) .............................46Nm
12 Camshaft Sprocket
13 Washer
14 12-Sided Stretch Bolt ............Check, 25Nm + 90 °
15 Timing Chain
16 Seal
17 Chain Tensioner ......................................... 80Nm
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OM600 ENGINE CONTROLS 1F3-31
Tools Required 601 589 00 08 00Flange
601 589 05 21 00 Locking Screw
116 589 20 33 00 Sliding Hammer
116 589 02 34 00 Threaded Bolt
667 589 04 63 00 Retaining Plate Removal & Installation Procedure
1. Remove the bolts (2) and then remove the cylinder head cover (1) and gasket (3). Installation Notice
Tightening Torque 10 Nm
Notice Replace the gasket.Rotate the engine 1 revolution by hand and check TDC marking of the crankshaft and camshaft.
2. Loosen the camshaft sprocket bolt (14). Notice Do not remove the bolt. Installation Notice Notice If max. length of bolt exceeds 53.6mm, replace it.
Tightening Torque 25Nm + 90 °
3. Loosen the bolt (11) (left-hand thread).
Notice Do not remove the bolt.