Section 3 - Troubleshooting
Technical Support
114101-000 X26 Ultra Narrow - Service Manual
Page 3-3
3-1 T
ECHNICAL
S
UPPORT
Technical Support is available by telephone or FAX.
U
P
R
IGHT
USA
Tel: 1-800-926-5438
FAX: 1-559-662-4785
U
P
R
IGHT
E
UROPE
Tel: +353-1-620-9300
FAX: +353-1-620-9301
3-2 G
ENERAL
P
ROCEDURE
Thoroughly study hydraulic and electric schematics in
Section 3 - Schematics
. Check for loose connec-
tions and short circuits. Check/repair/replace each component in the Truth Table which is listed under each
machine function which does not operate properly.
Determine whether the problem is mechanical (interference), electrical or hydraulic. Some functions
require power at more than one solenoid.
Use the charts on the following pages to help determine the cause of a fault in your UpRight Aerial Work
Platform.
NOTE:
Spike protection diodes at components have been left out of the charts to eliminate confusion.
3-3 T
ROUBLESHOOTING
P
ROCEDURES
1.
Verify your problem
. Do a full function test from both platform controls 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 com-
ponents are common to all circuits that are not functioning correctly. To aid in troubleshooting, the letters
following the component on the table are the same as the component’s designation on the schematics.
3.
Identify the problem component
. Test components that are common to all circuits that are not functioning
correctly. Remember to check wires and terminals between suspect components. Be sure to check con-
nections to battery negative.
4.
Repair or replace 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 according to specifications.
A
D J U S T M E N T
P
R O C E D U R E S
Figure 3-1:
Hydraulic Test Port
• Hydraulic settings must be
checked whenever a compo-
nent 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
manifold.
NOTE:
Correct pressure settings are
listed in the hydraulic schematic.
Test Port
Counterbalance
Valves