Page 327 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

25 Remove the gear pump return line .
26 Remove the gear pump body by loosening the allen screw.
27 Detach the gear pump
Cleaning
1 Clean all the removal parts using clean diesel .clean the pump body inner and outer parts.

Clean the gear pump body ,inner and outer gear .clean the all the fuel passage holes provide on the pump
Body with compressed air clean the magnetic filter screen.
2 Inspect the gear pump drive gear and driven gear if it is worn out , replace with new parts.

3 Inspect the magnetic filter if necessary replace it.
4 Inspect the drive shaft gears, flyweight drive gear and flyweight free movement .if necessary or any part is
worn our replace with new parts.
5 inspect the governer spring, governer shaft fuel button idle spring . replace the parts .
Inspection of solenoid unit
1 Dismantle the solenoid unit by unscrewing the allen screws .
2 Clean the fuel passage holes and check whether it is free from any blockage .
3 Connect the solenoid positive and negative with a 12 v supply .
4 Check the magnetism if the magnetism is weak replece the solenoid unit.
Assembling of PT fuel pump
Assemble all the parts already dismantled in the reverse order of dismantling

Note: All the oil seals,o rings and gaskets are to be replaced with new one.

TASK 3: Servicing of PT fuel Injector
1 Hold the PT fuel injector on holding fixture and fix on the bench vice.
2 Remove the fuel filter screen and retainer in the fuel inlet line.
3 Remove the top stop screw.
4 Remove the Injector link.
5 Remove the lock nut of PT injector.
6 Remove the spring washer and Injector spring.
7 Remove the plunger and Barrel.
8 Remove the cup retainer.

9 Remove the nozzle cup.
10 Clean all the parts with clean diesel.
11 Clean all fuel passages and orifices with compressed air.
12 Replace the o rings and gaskets with new one.
13 Assemble the Injector in the reverse order.

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CITS : Automotive - Mechanic Diesel - Exercise 18.1