Performance Testing

The performance testing of injection adjust shim includes electrical characteristics, accuracy, the tolerance of high temperature, low temperature, pressure as well as leakage, durability and others working conditions testing. These conditions of each injection adjust shim will be tested before our injection adjust shims are sent to customers.

Above are the tests needed to be done after the injection adjust shims are finished producing. However, regular checking also very important to keep the injection adjust shim perform well.

In order to make sure the injection adjust shim works normally, there are some parts of injection adjust shim needed to be checked regularly and before installing to injector.

① Check whether there is deformation, cracking, thread damage, quenching, leakage and rust in the guide sleeve, spring, gasket and tight cap of the injection adjust shim. The tight cap of the injection adjust shim must be replaced after being disassembled for more than 5 times, as shown in the following.

② Replace the tight cap of the injection adjust shim and the copper gasket of the injection adjust shim

③ Check whether the gap between the injection adjust shim needle and the injection adjust shim shell is within the standard range and whether it reaches the standard for use

④All parts should be examined for wear under a microscope at least 20 times larger

⑤ injection adjust shim tight cap deformation, cracking, thread damage, quenching, leakage, will lead to black smoke vehicle cap, fuel injector damage.

⑥injector opening pressure greater than or less than the specified range may cause injector damage.
⑦ Failure to replace wearing parts in time during maintenance may lead to fuel injector damage.

These are some precautions you need to know to maintain an injection adjust shim. If there are more questions about injection adjust shims and other problems, you are welcomed to contact us, injectorshims.com will do the best to help you solve your problems.