Page 236 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

iii Start and run engine until it runs outs of fuel.
iv Try three additional starts even after engine dies. Now fuel tubes completely purged
v Loosen the fitting which is leak and remove the fuel tube
vi Clean the high pressure fuel tube fitting and fuel tube
vii Insert fuel tube with pre-swaged, collapsed ferrules into the fitting body until the ferrules seats in the fitting
body.
viii Tighten the fitting nut by hand, then attach a back up wrench in the fitting body and tighten the nut with
another wrench
ix Check with Go-No-Go gauge
Note: Certain components required o rings lubricate the `O’ rings with special o-ring tube.
x Open the fuel line and check the leak

Fuel System Pressure Testing
9 Remote the fuel pressure service port cap on fuel rail
10 Attach a pressure test gauge to the service port
11 Start the engine and bring it to operating temperature
12 Check the pressure reading and compare with specifications. If the fuel pressure is above specification
replace fuel pressure regulator. If the fuel pressure is lower then specification
Check the following
i Verify the fuel cylinder control valves are open
ii Verify that manual shutoff valve are open
iii Verify fuel volume
iv Check for damaged fuel tubes
v Preform low pressure fuel shut off solenoid electrical test
vi Perform high pressure fuel shut off solenoid electrical test
vii Test the fuel injectors.

Note: Before checking fuel pressure, ensure that the cylinders are at least one - half full.

High Pressure fuel shut off solenoid Test (Fig 6)
13 Disconnect two way electrical connector for the solenoid
14 Use a set of 18 SWG jumper wires and momentarily apply 12v across the connector terminals of solenoid
15 Listen the solenoid click sound if it is not heard, replace the fuel pressure regulator assembly

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CITS : Automotive - Mechanic Diesel - Exercise 14.3 CITS : Automotive - Mechanic Diesel - Exercise 14.3