TESTING AND ADJUSTING FUEL PRESSURE 3516B ENGINE

Fuel Pressure

Testing and Adjusting

3516B and 3516C Engines for 789D Off-Highway Trucks.

Use the Electronic Service Tool or use the 1U-5470 Engine Pressure Group in order to check the
engine's fuel pressures.

 Illustration 1

1U-5470 Engine Pressure Group

(1) Pressure indicators
(2) Zero adjustment screw
(3) Pressure indicator
(4) Pressure tap
(5) Pressure indicator

Illustration 2

Fuel Manifold And Lines

(6) Fuel supply line to cylinder head

(7) Fuel manifold

The fuel pressure regulating valve keeps the pressure in fuel manifolds (7) between 415 to 450 kPa (60 to 65 psi). Disconnect one of the fuel lines (6). Install a tee between the line and the manifold in order to check the pressure in the fuel manifold. Connect the 1U-5470 Engine Pressure Group to the tee and operate the engine.( instal pressure tap on plug (9))

Illustration 3

This is an Illustration of the fuel transfer lines and the lines for the fuel filter.

(8) Fuel inlet line to priming pump

(9) Plug

(10) Line from fuel filters to fuel manifolds (filtered fuel)

(11) Fuel priming pump adapter

(12) Fuel line from transfer pump

(13) Fuel filters

The outlet pressure of the fuel transfer pump can be checked at the location of plug (9) in the fuel priming pump adapter (11)..