Page 4-2
Troubleshooting 4.2 - Troubleshooting
4.2 TROUBLESHOOTING
1. Verify your problem.
Do a full function test from both the platform and chassis controls, and note all functions that
are not operating correctly.
2. Narrow the possible causes of the malfunction.
Use the troubleshooting guide to determine which components are common to all circuits
that are not functioning correctly.
3. Identify the problem component.
Test components that are common to all circuits that are not functioning correctly. Remem-
ber to check wires and terminals between suspect components. Be sure to check connec-
tions to battery negative.
4. Repair or replace any component found to be faulty.
5. Verify that repair is complete.
Do a full function test from both the platform and chassis controls to verify that all functions
are operating correctly and that the machine is performing to specified values.
SPECIAL TOOLS
Following is a list of tools which may be required to perform certain maintenance procedures on
the TM12 work platforms.
Flow Meter with Pressure Gauge
( P/N 067040-000)
0-69 bar (0-1000 psi ) Hydraulic Pressure Gauge with Adapter Fittings (P/N 014124-010)
0-207 bar (0-3000 psi) Hydraulic Pressure Gauge with Adapter Fittings (P/N 014124-030)
Adapter Fitting (P/N 063965-002)
Inclinometer ( P/N 010119-000)
Crimping Tool ( P/N 028800-009)
Terminal Removal Tool ( P/N 028800-006)
ADJUSTMENT PROCEDURES
Hydraulic settings must be checked whenever a component is repaired or replaced.
Remove counterbalance valves and "bench test" them if they are suspect.
Connect a pressure gauge of appropriate range to the test port located on the hydraulic mani-
fold.
Correct pressure settings are listed in the hydraulic schematic.
CHECKING PUMP PRESSURES
Remove hose from pump port and connect pressure gauge.
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