Trinity Highway INGAL SS180 M, Assembly Manual

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trinityhighway.com 28 Revision A November 2019
Troubleshooting Guide
Safety Notes – See Troubleshooting Decision Trees on page 37.
1) Always wear eye protection when working on or around machinery or power tools, and
while working with hydraulics.
2) Do not attempt to control a hydraulic leak with your hand. High-pressure hydraulic fluid
can puncture the skin and cause severe injury or death. Use extreme caution when working
on hydraulic systems.
In general, consult Trinity Highway Customer Service if problems with operating or repairing the
TMA arise (p. 3). This guide is meant to be an aid for performing minor repairs, not a detailed repair
manual.
Note:
For any problems not listed here, contact Trinity Highway Customer Service.
Test Equipment
The following is a recommended list of the test equipment required to troubleshoot DC powered
hydraulic systems.
1. Gage
A 34.5 MPa pressure gage, preferably glycerin filled, is a valuable and relatively
inexpensive tool for checking fluid pressure in the various sections of the circuit.
2. DC Test Light
A test light is a light bulb with one lead wired to an alligator clip and the other lead connected
to a metal probe. It is used to check for the presence of a voltage in the electrical circuit.
With the alligator clip grounded, the light glows when the probe comes into contact with a
hot electrical component.
3. Continuity Light
A continuity light is like a test light but contains its own battery. It is used for testing electrical
circuits when the components are not connected to a power source.
4. Volt Meter
A DC voltmeter can be used to troubleshoot voltage problems. Two common uses are: 1)
Ground one probe while using the other to probe hot leads in search of the available voltage
at the point where the second probe is connected. 2) Measure a voltage drop in a wire or
component by connecting one probe to one end and the remaining probe to the other end
of the item in question.
5. Ohmmeter
Note: All tests conducted with an ohmmeter must be done with the power source
disconnected from the system.
An ohm meter is used to measure resistance and is useful when working with solenoid
coils. On some coils the wire resistance is large enough that a DC test light might not
illuminate, falsely indicating an open circuit (infinite resistance). A successful coil test,
however, shall always show some non-infinite value of resistance.
6. Assorted Hoses, Pressure Fittings
These can be used to connect and/or isolate certain parts of a hydraulic circuit for
diagnosing hydraulic problems.
If you suspect problems, do not operate the system. Diagnose and repair, or contact Trinity
Highway Customer Service Department for input as to your specific application.