Exclusions; Brad Harrison / Phoenix Contact M12; Engine Control Unit Connectors; Sealed Enclosures - JLG 400S Service And Maintenance Manual

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SECTION 7 - BASIC ELECTRICAL INFORMATION & SCHEMATICS

Exclusions

A limited number of connectors do not benefit from dielectric

grease, or may be permanently damaged by application.

Dielectric grease may not be required in properly sealed

The connector uses gold contact material to resist corrosion

and an o-ring seal for moisture integrity. If dielectric grease is

mistakenly applied to this connector system, the low-force

contacts cannot displace the grease to achieve electrical con-

tact. Once contaminated, there is no practical way to remove

the dielectric grease (replacement of female contacts

required). The JLG Load Sensing System and Rotary Angle Sen-

sors are examples of components with the M12 connector sys-

Figure 7-7. Brad-Harrison M12

Figure 7-8. Phoenix Contact M12

These connectors use back-seals for moisture integrity. How-

ever, the low-force contacts cannot displace dielectric grease

and create electrical contact. It is possible to use solvents (i.e.

contact cleaner or mineral spirits) for the removal of improp-

erly applied dielectric grease. The EMR4 engine control mod-

ule from Deutz employs this connector system (for example).

Application of dielectric grease is not required in properly

sealed enclosures. To meet criteria, the enclosure must be

rated to at least IP66 (dust tight; protected from powerful jets

of water). The enclosure must be fitted with a high quality,

continuous gasket and all wiring must pass through cable