Linhai HY740STL 2018 Service Manual page 114

CHAPTER 3 ENGINE
3.18.2.4 Lubricant Recommendation
Lubrication should be applied to the O-rings only for ease of injector installation.
The table 4 is a list of lubricant oils that were tested and approved for O-ring
lubrication. These lubricants have shown to have no effect on injector performance (plugging,
sticking).
3.18.2.5 Over -Voltage
The Multec 3 injectors and the Multec 3.5 injectors can withstand a voltage of 26v for a
maximum of one minute at a duty cycle of 100 ms pulse width and 200 ms period. The injector
will be pressurized with calibration test fluid at normal operating pressure during the test. This
will not result in any permanent physical damage to the injector or coil assembly, or any
degradation in electrical performance.
3.18.2.6 Temperature Requirements :
Typical injector temperature environments are defined below. The Multec 3
injectors and the Multec 3.5 injectors will not experience any loss of the ability to comply with
the flow tolerance requirements after exposure to the following
temperature environments. Also, they will not experience unacceptable external
leakage, any type of physical degradation, or loss of service life during or after
being exposed to these ambient conditions.
Normal Operating Temperature Range: - 30 to 125 C
Extreme Operating Temperature Range (some performance degradation): - 40
to 150 C
Storage Temperature Range: -60 to 60 C
3.18.2.7Fuel Contamination
The injector fuel inlet filter protects the fuel injector from initial build fuel
contamination as well as from fuel system assembly contamination. Filtration is
extremely important because particle contaminants can cause an injector to stick
open, flow shift or tip leak.
The injector inlet filter is not a serviceable component and is designed only to trap
potential built-in contamination between the chassis fuel filter and injector.
3.18.2.8Wire Routing
Electrical wiring to the injector should be routed so that conductors are
protected from excessive heat, damage, and wear.
Avoid unnecessary handling (disconnecting and connecting) of the electrical
connector.
3.18.2.9 Handling - DOs & DONTs
M750L SERVICE MANUAL 18.0
CHAPTER 3 ENGINE PAGE 3- 83