Trinity Highway INGAL SS180 M, Assembly Manual

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trinityhighway.com 37 Revision A November 2019
Important:
Check ground connections and remove any paint, rust, or dirt that may
be acting as insulators.
2 DC Motors
Before concluding that the hydraulic pump is malfunctioning:
1) Verify that all connections are secure and that the problem does not lie somewhere
else.
2) Check ground.
3) Check brushes for wear, and replace if necessary.
Important:
A motor that does not turn in freezing weather may indicate frozen
water in hydraulic system.
If it has been verified that the pump is defective; contact Trinity Highway Customer Service
Department for input as to your specific application (p. 3).
3 Electrical Switches
A. If you suspect that the switch is defective, use one of these three methods to test the
operation of the switch:
1) First check grounds.
2) Use continuity light to test the switch (p.37).
3) Use a circuit test light to test the switch (p.37).
B. Motor solenoid switches:
The solenoid switches found on the hydraulic pump are four post style solenoid. They shall
be constructed and wired such that:
1) The large posts with the connecting bar must be attached to the cable from the battery.
2) The same post is the shared hot lead and provides power to the control circuit.
3) The remaining large posts attach to the motor wires.
4) The small post on each solenoid connects to the control circuit on the side and the
other small post connects to the ground. This circuit activates both the solenoid and the
pump when energized.
4 Electrical Polarity
The pump motor and all controls have a negative ground.
5 Electrical Shorts or Open Circuits
A. Shorts occur when wires with power come in contact with a ground. A short will cause a
fuse to blow or a wire to burn. Look for pinched or cut wires.
B. An open circuit is simply a break which prohibits current flow. Look for pinched or cut
wires.