JLG 340AJ Service Manual - Manual (Page 320)

SECTION 7 - BASIC ELECTRICAL INFORMATION & SCHEMATICS
7-6 – JLG Lift – 3121259
BRAD HARRISON / PHOENIX CONTACT M12
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 1250AJP Rotary
Angle Sensors are examples of components with the M12 con-
nector system.
AMP JUNIOR TIMER
This type of connector uses back-seals for moisture integrity.
However, the low-force contacts cannot displace dielectric
grease and create electrical contact. It is possible to use sol-
vents (i.e. contact cleaner or mineral spirits) for the removal of
improperly applied dielectric grease. The EMR2 engine control
module from Deutz employs this connector system (for exam-
ple).
SEALED ENCLOSURES
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
entrances.