Terex Genie GS-1330m Service And Repair Manual page 79

August 2021
Valve Coil Resistance
Specification
Note: The following coil resistance specifications
are at an ambient temperature of 68°F / 20°C. As
valve coil resistance is sensitive to changes in air
temperature, the coil resistance will typically
increase or decrease by 4% for each 18°F / 10°C
that your air temperature increases or decreases
from 68°F / 20°C.
Description
Solenoid valve, 3 position 4 way,
20V DC with diode (schematic item F,
AC or DC)
Solenoid valve, 3 position 4 way,
20V DC with diode (schematic item E)
Solenoid valve, 2 position 4 way,
20V DC with diode (schematic item H, AI
or DI)
Solenoid valve, 2 position 2 way,
N.C. 20V DC with diode (schematic item
N)
Solenoid valve, 2 position 4 way,
20V DC with diode (schematic item AE or
DE)
Solenoid valve, 3 position 5 way,
20V DC with diode (schematic item AG or
DG)
Solenoid valve, 2 position 2 way,
20V DC with diode (schematic item CA,
CB, CC and CD
Solenoid valve, 3 position 4 way,
20V DC with diode (schematic item BA)
Proportional solenoid valve, 2 position
2 way,
20V DC with diode (schematic item DN)
Solenoid valve, 3 position 4 way
24V DC with diode (schematic item EA,
HD)
Solenoid valve, 2 position 4 way
24V DC with diode (schematic item EC,
HC)
Part No. 1309020GT
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.
Specification
27.2Ω
19Ω
1
19Ω
2
25Ω
Note: The battery should read 9V DC or more
when measured across the terminals.
19Ω
Resistor, 10Ω
19Ω
Genie part number
3
Note: The multimeter, when set to read DC
27.2Ω
amperage, should be capable of reading up to
800 mA.
19Ω
4
23.9Ω
33.75Ω
33.75Ω
GS ™ -30m • 32m • 30 • 32 • 46 • 55
Service and Repair Manual
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
Test the coil resistance. Refer to Repair
Procedure, How to Test a Coil.
Connect a 10Ω 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.
Set a multimeter to read DC amperage.
Connect the negative lead to the other
terminal on the coil.
Manifolds
27287
65