JLG T500J, Руководство по обслуживанию и ремонту

Страница: 277 / 306

SECTION 7 - BASIC ELECTRICAL INFORMATION & SCHEMATICS
3121200 7-5
7.4 APPLYING SILICONE DIELECTRIC COMPOUND
TO ELECTRICAL CONNECTIONS
Silicone Dielectric Compound must be used on all electrical
connections for the following reasons:
• To prevent oxidation at the mechanical joint between male
and female pins.
• To prevent electrical malfunction caused by low level con-
ductivity between pins when wet.
Use the following procedure to apply Silicone Dielectric Com-
pound to the electrical connectors. This procedure applies to
all plug connections not enclosed in a box. Silicone grease
should not be applied to connectors with external seals.
1. To prevent oxidation, silicone grease must be packed
completely around male and female pins on the inside
of the connector prior to assembly. This is most easily
achieved by using a syringe.
NOTE: Over a period of time, oxidation increases electrical resis-
tance at the connection, eventually causing circuit failure.
2. To prevent shorting, silicone grease must be packed
around each wire where they enter the outside of the
connector housing. Also, silicone grease must be
applied at the joint where the male and female connec-
tors come together. Any other joints (around strain
reliefs, etc.) where water could enter the connector
should also be sealed.
NOTE: This condition is especially common when machines are
pressure washed since the washing solution is much more
conductive than water.
3. Anderson connectors for the battery boxes and battery
chargers should have silicone grease applied to the con-
tacts only.
NOTE: Curing-type sealants might also be used to prevent short-
ing and would be less messy, but would make future pin
removal more difficult.
When applied to electrical connections, dielectric grease helps
prevent corrosion of electrical contacts and improper conduc-
tivity between contacts from moisture intrusion. Open and
sealed connectors benefit from application of dielectric
grease.
Dielectric grease shall be applied to all electrical connectors at
the time of connection (except those noted under Exclusions).
Installation of Dielectric Grease
Before following these instructions, refer to excluded connec-
tor types (See Exclusions below).
1. Use dielectric grease in a tube for larger connection
points or apply with a syringe for small connectors.
2. Apply dielectric grease to plug/male connector housing
which typically contains sockets contact/female termi-
nals.
3. Leave a thin layer of dielectric grease on the face of the
connector.
4. Assemble connector system immediately to prevent
moisture or dust contamination.
5. Pierce one of the unused wire seals before assembly if
the connector system tends to trap air (i.e. AMP Seal)
and then install a seal plug.
Figure 7-5. Applying Dielectric Grease