201
M4.4-1055-001
ELECTRICAL
Contactor
Contactor
110613-005 Contactor (36/48 Volt)
110613-007 Contactor (36 Volt)
The purpose of these instructions is to instruct the tech-
nician on proper care and maintenance to obtain satis-
factory service from these devices. Crown has tested
and applied these contactors according to the require-
ments of our vehicle. No modifications or changes
should be made in the layout, physical arrangement or
electrical connections without permission from Crown.
Before any inspection, adjustments, servicing, parts re-
placement or any other act is performed requiring
physical contact with the electrical working compo-
nents or wiring of these contactors, disconnect battery,
raise drive wheels clear of floor and place blocks under
truck frame.
Inspection
The following information is intended to assist during
periods of normal maintenance and to provide checks
for maintaining adjustments. As these devices are
tested and adjusted at the factory, they should not nor-
mally require further adjustments. However, if factory
adjustments are tampered with or otherwise changed,
the checks contained in the following information may
be made.
Contacts
• In normal operation, contacts will become black-
ened, discolored, and roughened. This will not in-
terfere with proper operation and cleaning is not
necessary.
• Contacts should be replaced before the silver con-
tact facing is completely eroded through to the
backing material. The silver contact facing may
transfer to either the moving or stationary contact
and cause buildup on one contact. This can be ex-
pected under certain conditions and does not re-
quire contact dressing or filing.
• It is recommended that contacts always be re-
placed in pairs.
Coil
• Remove all electrical connections to coil.
• Contactor 110613-005, resistance reading of coil
to be between 70 - 78 ohms. Contactor 110613-
007, resistance reading of coil to be between 39 -
49 ohms.
• If reading does not fall within these limits, replace.
Component Replacement
Refer to Figure 5674-01 and parts breakdown in the
Service And Parts manual.
Figure 5674-01
Crown 2006 PF15387-1
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