JLG 1350SJP Service Manual - Manual (Page 511)

SECTION 7 - BASIC ELECTRICAL INFORMATION, ELECTRICAL & HYDRAULIC SCHEMATICS
3121142 – JLG Lift – 7-3
Current Measurement
• Set up the meter for the expected current range
• Be sure to connect the meter leads to the correct jacks
for the current range you have selected
• If meter is not auto ranging, set it to the correct range
(See multi meter’s operation manual)
• Use firm contact with meter leads
7.3 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.
Figure 7-4. Current Measurement (DC)