Technical modifications: Diesel Injection system - ra0701602ta01x

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Engines 602.96, 603.96/97 TURBO

07.1 Diesel injection system

Op. No.	Designation	Nature and reason for modification	Production breakpoint as of
-	Injection pump	Engine 603.96: Injection pump with modified cam shape, prechamber with enlarged volume.	06/91 or model year 1992
-	Pressure transducer	Elimination of pressure transducer with automatic transmission, national versions .	01/91
07.1-0010	Injection nozzles	Precision ground injection nozzles.	08/89-02/90
07.1-0010 P	Injection nozzles	Facet depth on spray pintle reduced.	04/92
07.1-0010	Key-operated engine stop	Engine 603.971, model 140: Key-operated engine stop operates via a relay and an electric switchover valve.	Model year 1992
07.1-0010	Exhaust gas recirculation ARF	ARF shutoff at 10° before full load by means of microswitch and switchover valve in order to reduce smoke emission during load change in direction of full load.	06/91 or model year 1992
07.1-0010	Charge pressure control (P2 control)	Elimination of dependence of charge pressure control on coolant temperature and intake air temperature. On engine 602.96 the charge pressure is controlled by a common pressure converter and an electrical switchover valve each for vacuum unit, charge pressure control valve or control pressure flap, on engine 603.971 by means of a pressure converter and a switchover valve.	06/91 or model year 1992
07.1-0010	Base module and test coupling	Engine 603.971: Basic module performs the function of the overvoltage protection relay and the 38-pin test coupling is integrated in the module box.	Model year 1992
07.1-0010	Pressure sensor	The Bosch pressure sensor is replaced by a Nippon Denso pressure sensor.	06/91 or model year 1992
07.1-0010	ARF valve	For noise reasons the ARF valve has a smaller air shaft and a shaped valve seat. Connection fitting for vacuum connection is tulip-shaped.	07/91
07.1-0010	Electronic diesel system (EDS)	Electronic diesel system control unit (EDS 6) engine 603.970 software modified (exhaust recirculation rate increased).	11/90
07.1-0010	Engine overload protection	Engine overload protection no longer fitted to all engines equipped with charge pressure control.	06/91 or model year 1992
07.1-0010	Exhaust gas recirculation valve	Cast EGR valve (was steel) Reason: cost and weight reduction. Engine 602.961/962, 603.960/963/971	12/92 or 01/93
07.1-0010	Exhaust gas recirculation valve	EGR valve vent restrictor modified. Engine 603.960/963/971	06/93
07.1-0010	Engine overload protection	Elimination of engine overload protection Engine 602.962, 603.960/963	01/93 or 02/93
07.1-1100	Start of delivery, idle speed control	Start of delivery shifted from 15 ± 1 ° after TDC to 14 ± 0.5 ° after TDC. On engine 603.971 idle speed reduced from 630 ± 20/min to 610 ± 20/min.	06/91 or model year 1992 model year 1992
07.1-1826	Vacuum control valve	Vacuum control valve modified, seal integrated. Engine 602.962, 603.960/963/971	11/93
07.1-1826	Vacuum control valve	Restrictor integrated in vacuum control valve. Engine 602.962, 603.960/963/971	06/94
07.1-1843	Vacuum pump	Vacuum pump modified for cost reasons. Engine 602.962	12/94

Technical Modifications Engine 602.96, 603.96/97 TURBO Combustion II

07.1 Diesel injection system

Op. No.	Designation	Nature and reason for modification	Production breakpoint
07.1-1121	Testing electronic diesel system (EDS)	Engine 603.971, electric and pneumatic function test of key-operated engine stop because of modified version.	Model year 1992

07.1 Diesel Injection System

Op. No.	Designation	Nature and reason for modification	Production breakpoint
07.1-0500	Vacuum diagrams	Separate vacuum supply for key-operated engine stop. The vacuum supply is taken from the check valve of the main vacuum line.	07/87
07.1-0500	Vacuum diagrams	Elimination of vacuum amplifier of automatic transmission.	06/91 or model year 1992
07.1-0500	Vacuum diagrams	ARF shutoff by means of microswitch and switchover valve to achieve rapid exhaust gas recirculation shutoff at full load.	06/91 or model year 1992
07.1-0500	Vacuum diagrams	P2 control and vacuum control flap are each actuated by their own switchover valve and the same vacuum transducer.	06/91 or model year 1992
07.1-2053	Idle speed	Injection pump engine 603.971, idle speed reduced from 630 rpm to 610 rpm.	09/91
07.1-5563	Fuel filter	Standard filter box for end line pump and distributor pump Engine 602.962, 603.960/963/971	03/94
07.1-6750	Injection nozzle	Ejection pressure of used nozzle at least 130 bar (previously 120 bar).	06/91 or model year 1992
07.1-6810	Bracket of injection pipes	Standardization of brackets for injection pipes (reduction of versions) Engines 602.961/962, 603.960/963/971	04/93
07.1-6810	Bracket of injection pipes	Brackets for injection pipes cylinders 1-3 made of modified material (PA46, was POM 906) Engines 602.961/962, 603.960/963/971	06/93

Op. No.	Designation	Nature and reason for modification	Production breakpoint
07.1-6810	Leak oil hose	Leak oil hose between nozzle holders modified. Improved fitting security of hoses to connection of bracket. Engines 602.962, 603.960/963/971	02/94
07.1-8014	Injection timing device	Segment flange of injection timing device modified from forging to sintered part. Engines 602.962, 603.960/963/971	04/94
07.1-8240	Start of delivery	Start of delivery altered from 15 ± 1 ° after TDC to 14 ± 0.5 ° after TDC.	06/91 or model year 1992
07.1-8823	Immobilizer	Engine parts for immobilizer. New parts: shutoff valve, overflow valve. Engine 603.971	10/94