Section 4 • Repair Procedures
March 2015
Part No. 123701
GTH-1048 • GTH-1056
4 - 63
MANIFOLDS
9V
BATTERY
10
RESISTOR
W
MULTI
METER
COIL
+
-
+
-
d
b
b
a
c
c
How to Test a Coil Diode
Genie incorporates spike suppressing diodes in all
of its coils. Properly functioning coil diodes protect
the electrical circuit by suppressing voltage spikes.
Voltage spikes naturally occur within a function
circuit following the interruption of electrical current
to a coil. Faulty diodes can fail to protect the
electrical system, resulting in a tripped circuit
breaker or component damage.
Electrocution hazard. Contact with
electrically charged circuits could
result in death or serious injury.
Remove all rings, watches and
other jewelry.
1 Test the coil for resistance. See 7-8,
How to
Test a Coil.
2 Connect a 10
Ω
resistor to the negative terminal
of a known good 9V DC battery. Connect the
other end of the resistor to a terminal on the
coil.
Note: The battery should read 9V DC or more
when measured across the terminals.
Resistor, 10
Ω
Ω
Ω
Ω
Ω
Genie part number
27287
3 Set a multimeter to read DC amperage.
Note: The multimeter, when set to read DC
amperage, should be capable of reading up to
800 mA.
4 Connect the negative lead to the other terminal
on the coil.
Note: If testing a single-terminal coil, connect the
negative lead to the internal metallic ring at either
end of the coil.
a
multimeter
b
9V DC battery
c
10
Ω
resistor
d
coil
Note: Dotted lines in illustration indicate a
reversed connection as specified in step 6
5 Momentarily connect the positive lead from the
multimeter to the positive terminal on the 9V
battery. Note and record the current reading.
6 At the battery or coil terminals, reverse the
connections. Note and record the current
reading.
Result: Both current readings are greater than
0 mA and are different by a minimum of 20%.
The coil is good.
Result: If one or both of the current readings are
0 mA, or if the two current readings do not differ
by a minimum of 20%, the coil and/or its
internal diode are faulty and the coil should be
replaced.
Содержание GTH-1048
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Страница 178: ...Section 6 Schematics May 2015 6 15 Harness Map Control System Power Dual Joystick 6 16 ...
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Страница 182: ...Section 6 Schematics May 2015 6 19 Harness Map Deutz TCD3 6 Engine Battery Power and Ground 6 20 ...
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Страница 193: ...May 2015 Section 6 Schematics 6 30 Harness Map Options Road Lights 6 29 ...
Страница 194: ...Section 6 Schematics May 2015 6 31 Harness Map Options Enclosed Cab with Heater 6 32 ...
Страница 197: ...May 2015 Section 6 Schematics 6 34 Harness Map Options Enclosed Cab with HVAC 6 33 ...
Страница 198: ...Section 6 Schematics May 2015 6 35 Electrical Schematic View 1 before serial number GTH1012 16292 6 36 ...
Страница 201: ...May 2015 Section 6 Schematics 6 38 Electrical Schematic View 2 before serial number GTH1012 16292 6 37 ...
Страница 202: ...Section 6 Schematics May 2015 6 39 Electrical Schematic View 1 from serial number GTH1012 16292 to 19340 6 40 ...
Страница 205: ...May 2015 Section 6 Schematics 6 42 Electrical Schematic View 2 from serial number GTH1012 16292 to 19340 6 41 ...
Страница 206: ...Section 6 Schematics May 2015 6 43 6 44 Electrical Schematic View 1 from serial number GTH1014 19341 GTH1014E 1001 ...
Страница 209: ...May 2015 Section 6 Schematics 6 46 Electrical Schematic View 2 from serial number GTH1014 19341 GTH1014E 1001 6 45 ...
Страница 210: ...Section 6 Schematics May 2015 6 47 Hydraulic Schematic Models with Single Joystick 6 48 ...
Страница 213: ...May 2015 Section 6 Schematics 6 50 Hydraulic Schematic Models with Dual Joystick 6 49 ...
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