Upright SB60 Service & Parts Manual page 46

Section
4.1
THEORY OF OPERATION
The operating functions of the SB60 are powered by
two hydraulic pumps.
The large Rexroth pump powers the drive wheels and
the smaller Barnes pump powers all the other functions.
Driving, Lift, Turret and Boom Extend operations are
controlled from a SuperFlex controller located in the
platform control box.
All other functions are operated by switches or levers
located in the platform or Chassis control boxes.
There is an emergency power unit to provide power to
lower the platform In case of engine failure.
TROUBLESHOOTING
1. Verify your problem.
Do a full function test from platform controls
and chassis controls and note all functions that
are not operating correctly.
2. Narrow the possible causes of the malfunction.
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. Remember to
check wires and terminals between suspect compo-
nents. Be sure to check connections to battery
negative.
4. Repair or replace component found to be faulty.
5. Verify that repair is complete.
Do a full function test from platform and chassis
controls to verify that all functions are operating
correctly and machine is performing to specified
values.
4-2
Troubleshooting
SPECIAL TOOLS
Following is a list of tools which may be required to
perform certain maintenance procedures on the SB60.
Flow Meter with Pressure Gauge (UpRight P/N
0-1000 PSI Hydraulic Pressure Gauge with Adapter
0-3000 PSI Hydraulic Pressure Gauge with Adapter
Adapter Fitting (UpRight P/N 063965-002)
Inclinometer (UpRight P/N 010119-000)
SuperFlex Optimizer (UpRight P/N 100329-000)
Crimping Tool (UpRight P/N 028800-009)
Terminal Removal Tool (UpRight P/N 028800-006)
ADJUSTMENT PROCEDURES
Hydraulic settings must be checked whenever a compo-
nent is repaired or replaced.
Remove counter balance valves and "bench test" them if
they are suspect.
Connect a pressure meter of appropriate range to the
test port located on top of the hydraulic manifold.
Correct pressure settings are listed in the hydraulic
schematic (UpRight Drawing #100027-000).
Refer to SuperFlex Optimizer settings listed in SuperFlex
manual supplied with Optimizer.
CHECKING PUMP PRESSURES
Remove hose from pumpport and connect pressure
tester.
067040-000)
Fittings (UpRight P/N 014124-010)
Fittings (UpRight P/N 014124-030)
TEST PORT
SB60 Work Platform