Removing
1. Remove the mixing chamber.
2. Disconnect the injection fuel line 1 and plug 2 from the nozzle of the fourth cylinder (see fig. 4.70).
Pic. 4.70. Nozzles:
1. Fuel injection line,
2. Cork,
3. Nozzle,
4. Seal,
5. Fuel injection lines,
6. Crankcase ventilation tube,
7. Bracket.
3. Disconnect bracket 7.
4. Disconnect the fuel lines 5 from the injectors and fix them on the side. Don't bend them.
5. Remove nozzles 3 and disconnect seal 4.
Examination
6. Install nozzle 1 in the tester (see fig.4.71).
Pic. 4.71. Injector check:
1. Nozzle,
2. Pressure gauge,
3. Faucet,
4. Lever.
"A". Spray is good
"IN". Spray is bad.
7. Close tap 3 on the tester and use pressure gauge 2 to purge the nozzle about five times.
8. Carry out a quick test, for this you need to move the tester lever 4 slowly and evenly (about 1 cycle). Spraying should occur with an even jet.
9. Carry out an injection test, for this it is necessary to move the tester lever 4 quickly (about 3 cycles). In this case, there can be two types of spray flows: good - A and bad - B.
10. Open tap 3 of the tester.
11. Check injection pressure. To do this, slowly build up pressure using lever 4 and measure it on pressure gauge 2.
- Injection pressure adjustment value: 115 - 125 bar.
- Nozzle working pressure: minimum 100 bar.
- The maximum allowable difference between the working pressure of the engine injectors: 5 bar.
Installation
12. Installation is made in an order, the return to removal.