Electrical System - White Outdoor LT-5 Service Manual

700 SERIES LAWN TRACTORS
16.13. Remove the self-tapping screws on the left side
of the tractor that secure the front pivot bracket.
See Figure 16.13.
Loosen rear
screws
Self tapping
Remove front
screws screws
Figure 16.13
16.14. Remove the front screws only. Loosen the rear
screws. this will allow the bracket to pivot for-
ward, freeing the pivot bar from the frame.
See Figure 16.14.
Pivot Point
Figure 16.14
16.15. Installation notes:
• Apply anti-seize compound liberally to all of the
friction surfaces of the pivot bar, particularly the
round boss that serves as the central pivot point.
• Replacing all of the plastic bushings while the
pivot bar is disassembled makes economic and
mechanical sense.
• Grease all moving parts on reassembly, using
MTD P/N 737-0300A (Benelene), or similar
grease.
17.

ELECTRICAL SYSTEM

17.1. Introduction: The electrical system was
designed with the RMC module that was intro-
duced for the '05 season as an integral compo-
nent.
• The RMC module contains electronic logic
circuits. When diagnosing anything that is con-
nected to the RMC module, high impedance test
light or a high impedance digital volt-ohm meter
(DVOM) should be used. The amperage draw of
a standard incandescent test light may over-bur-
den some internal electronic circuits, burning-out
the module.
NOTE: These tools are not outrageously expen-
sive or exotic. High impedance test lights (Thex-
ton model 125 is typical) can be purchased
locally from stores like NAPA for under $30.00.
Appropriate multi meters can be purchased for
under $100.00, and are an invaluable tool for
any competent technician.
• It is typical when industries shift from electro-
mechanical to electronic controls that diagno-
sis shifts from tracing through a number of inde-
pendent circuits to checking the in-puts to and
out-puts from a central processor. This is similar
to, but much less complex than the transition
that the auto industry made with the conversion
to fuel injection in the 1980s.
• The starter safety circuit has no connection to
the RMC module.
• The safety circuits that are capable of turn-
Pivot bar
ing-off the engine work through the RMC mod-
bracket
ule.
• It is still important to be familiar with the workings
of the individual components of the electrical
system, but some of them can now be checked
from a central point on the tractor. This
makes life easier on the technician, frequently
making it unnecessary to connect to difficult to
reach switches in the preliminary stages of diag-
nosis.
• The function of individual safety switches can be
seen as providing information "inputs" to the
RMC module.
• The next part of this section gives a detailed
description of the electrical components on
this tractor, their function in the system, and their
physical location on the tractor. Armed with this
information and the proper tools, a technician
should be able to efficiently diagnose most elec-
trical problems.
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