YZR-70 fuel oil pressure inspection subassembly

Ⅰ. Function

It is necessary to test fuel pressure during trouble shooting of fuel injection system. When an engine is working, high fuel pressure will make the gas mixture of engine too heavy to causemalfunction of engine, incomplete combustion, increase of carbon deposition, and over-standard emission of tail gas, etc. On the other hand, low fuel pressure will make the gas mixture of engine too thin to cause burning of injector and detonation of engine, this will further damage piston,piston ring, connecting rod and crankshaft, and as a result, the automobile won't work. Therefore, the automobile engine fuel pressure test kit is a necessary tool to maintain the injection system of an engine.

Ⅱ, Safety rules for testing and cleaning of system beforehand

1. Wear protective glasses;

2. Choose a well-ventilated working area, and neverinhale waste gas;

3. Prepare a fire extinguisher used for gasoline /electronics /chemicals to prevent fire;

4. Never touch revolvable or over-heated parts of engine during operation;

5. Be sure to put the transmission shift lever on "P"(automatic speed change box) or neutral position, pull tight the parking brake, and lock up the driving wheel;

6. Never put tools on the storage battery, otherwise it would cause short circuit, body injury or damage of the tools and storage battery.

7. Never smoking or making open fire near the automobile, since fuel vapor or gas emitted from the storage battery easily burns and explodes;

8. Ask a person to keep a close watch on what is going on during test run;

9. When the fuel pipe is being taken down or connected, put cloth at the adaptor of the fuel pipe to prevent fuel spill and then properly treat all the cloth that has absorbed fuel;

10. If there's any fuel spill, clean off the spilled fuel immediately;

11. Keep away from the cooling fan of engine, and the cooling fan may suddenly rotate in some automobile;

12. Relieve the fuel pressure before taking down the fuel pipe;

13. As for automobiles equipped with air bags, strictly observe relevant rules listed in the maintenance manual; otherwise the air bags would suddenly unfold and cause body injury. Please remember that the air bags will unfold several minutes after turning off of ignition switch (even the storage battery isn't connected) due to a special storage equipment of the engine;

14. After testing, discharge all the fuel in the connection pipe of the pressure gauge into a proper container, and then take down the pressure gauge and connection pipe.