AB62 Work Platform - European
4-1
S e c t i o n 4
T
ROUBLESHOOTING
Introduction
This manual cannot cover all possible problems that
may occur. If a specific problem is not covered in this
manual, call our toll free number for service assis-
tance.
Referring to Sections 2.0 and 5.0 will aid in under-
standing the operation and function of the various
components and systems of the AB62, and help in
diagnosing and repair of the machine.
Troubleshooting Procedure
Determine whether the problem is mechanical (inter-
ference), electrical or hydraulic. Some functions
require power at more than one solenoid.
Thoroughly study hydraulic and electrical schematics
in Section 5. Check for loose connections and short
circuits. Check/repair/replace each component in the
Truth Table which is listed under each machine func-
tion which does not operate properly.
Use the charts on the following pages to help deter-
mine the cause of a fault in your UpRight AB62.
1. Verify your problem. Do a full function test from
both platform controlsand chassis controls, and
note all functions thatare 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 compo-
nents that are common to all circuits that are not
functioning correctly. Remember to check wires
and terminals between suspect components. Be
sure to check connections to battery negative.
4. Repair or replace faulty component.
5. Verify that repair is complete. Do a full function
test from both platform and chassis controls to
verify that all functions are operating correctly
and machine is performing to specified values.
U
P
R
IGHT
USA
T
EL
: 1-559-891-5200
FAX: 1-559-891-8931
U
P
R
IGHT
T
EL
: +31-10-238-0000
I
NTERNATIONAL
FAX: +31-10-238-0001
Adjustment Procedures
Hydraulic settings must be checked whenever a com-
ponent is repaired or replaced.
Remove counterbalance valves and “bench test”
them if they are suspect.
Connect a pressure meter of appropriate range to the
test port located on the right side of the hydraulic
manifold.
Correct pressure settings are listed in Section 5.
Refer to DMR 30 (See page 4-3) settings listed in this
section.
Checking Pump Pressure
Drive Pump
Check charge pressure at tee added to charge filter
line.
To check drive pressure, connect pressure tester to
port “G” on the 2-speed/axle lock valve block.
W A R N I N G
!
!
When troubleshooting, ensure that the work
platform is resting on a firm, level surface.
When performing any service which requires
the platform to be raised, the Elevating Assem-
bly must be blocked.
Disconnect the battery when replacing or test-
ing the continuity of any electrical component.
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