Perform the following procedures for removal and installation of the fuel injector nozzle.
Fuel Injector Nozzle Removal
Remove the fuel injector nozzle as follows:
Remove the engine trim cover.
The MBE 4000 engine has individual heads for each cylinder. To remove the injector nozzle for one cylinder, do these procedures step by step. To remove all the injector nozzles, repeat each step in these instructions, as applicable, for all six cylinders.
Remove the cylinder head cover for each cylinder head, as required. Refer to section
Cap off or cover the openings in the fuel lines to prevent contamination of the fuel.
Fuel Injector Nozzle Installation
Install the fuel injector nozzle as follows:
Using a dial caliper, measure the length of the M10 retaining bolt from the end of the bolt to the bottom of the flange. See Figure
. The acceptable lengths are listed in Table
. Replace any bolt which does not meet these specifications.
1. Dial Caliper
3. Bottom of Flange
2. End of Retaining Bolt
Measuring the Retaining Bolt
Length, mm (in.)
Shaft length when new
90.0 mm (3.54 inches)
Maximum shaft length
91.0 mm (3.58 inches)
M10 Retaining Bolt, Length
Lubricate a new nozzle O-ring with a light coating of engine oil and install it on the nozzle.
Install a new seal ring on the nozzle.
Take care that the nozzle is installed correctly and is aligned properly with respect to the transfer tube.