Main Power, Glow and Operator Cab Power (Groundsmaster 4010--D) Relays
The main power, glow and operator cab power relays
arelocated atthe power center behind the operator seat
(Fig. 39). The wire harness is attached to these relays
with a four (4) wire connector (Fig. 40).
8. Secure relay to mounting bracket and connect wire
harness connector torelay.Secure power center totank
support if it was removed. Install cover (item 1) and heat
shield (item 11) to power center.
The main power relay is used to provide current to the
TEC controllers and most of the fuse protected circuits
(operator seat, power point and optional electric equip-
ment). When the ignition switch is in the ON or START
position, the main power relay is energized.
9. Connect positive (+) cable to battery and then con-
nect negative (--) cable to battery (see Battery Service
in the Service and Repairs section of this chapter).
10.Lower
and secure hood.
The glow relay is used to provide current to the engine
glow plugs when the relay is energized by the
TEC--5002controller.TheTEC--5002controlsandmon-
itors the operation of the glow relay.
1
3
12
11
2
The operator cab power relay on Groundsmaster
4010--D
machinesisusedtoprovidecurrenttotheoper-
ator cab electrical components. When the ignition
switch is in the ON or START position, the cab power
relay is energized.
5
Testing
6
7
1.
Park machine on a level surface, lower cutting
8
decks, stop engine, engage parking brake and remove
key from the ignition switch. Raise and support hood.
RIGHT
10
FRONT
9
2.
To make sure that machine operation does notoccur
4
unexpectedly, disconnect negative (--) cable from bat-
tery and then disconnect positive (+) cable from battery
(see Battery Service in the Service and Repairs section
of this chapter).
Figure 39
1.
2.
3.
4.
5.
6.
Cover
7.
8.
9.
10. Cab power relay
11. Heat shield
Lock nut
Main power relay
Glow relay
Screw
Flange nut (2 used)
Carriage screw (2 used)
Screw
3.
Removecover(item1)andheatshield(item11)from
power center and locate relay to be tested. If necessary,
remove two (2) flange nuts and carriage screws that se-
cure power center to tank support.
Mount
12. Screw (2 used)
4.
move relay from mounting bracket for testing.
Disconnect wire harness connector from relay. Re-
86
85
87
30
5.
tween terminals 86 and 85 is approximately 72 ohms.
Using a multimeter, verify that coil resistance be-
85
87
86
30
6.
Connectmultimeter (ohmssetting) leadstorelayter-
minals 30 and 87. Ground terminal 86 and apply +12
VDC to terminal 85. The relay should make and break
continuity between terminals 30 and 87 as +12 VDC is
applied and removed from terminal 85.
Figure 40
7.
Disconnect voltage and test leads from the relay ter-
minals.
Groundsmaster 4000--D/4010--D
Page 5 -- 33
Electrical System
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