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Removing and installing injection valves - RA07041046520X (07.4-6520)

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Preceding work

Removing and installing fuel distributor with injection valves (07.4-1451)

Operation No. of operation texts and operation values or standard texts and flat rates

07-6520

Fig 1: Identifying Injection Valves Components
G04678270Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Plug connections unplug, plug in.
Anti-twist lock (12) pull off at injection valves, fit on.
IMPORTANT
Anti-twist lock must engage in four-sided lug (arrow) at injection valve (Y62).
Injection valves (Y62) withdraw from fuel distributor, insert.
O-rings (14) replace, oil slightly to facilitate installation.
NOTE: As of 09/92 modified injection valves have been used. The fuel outlet (a) has been converted from 4 to 2 holes to achieve improved fuel preparation.
Fig 2: Identifying Fuel Outlet Holes Of Injection Valve
G04678271Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

As a result of the arrangement of the holes, 2 jets are formed when the fuel flows out which spray the fuel in the finely atomized flow onto both injection valves.

Fig 3: Identifying Fuel Spray
G04678272Courtesy of MERCEDES-BENZ OF NORTH AMERICA.