4-8 SB80 Work Platform - European
T
ROUBLESHOOTING
Section
4.4
Torque High Speed
Foot switch depressed
BT4-03 om DMT-30 (Function enabled)
BT6-04 (shift valve) illuminated if drive interlock is
activated.
Torque Position
No signal at BT4-09 on DMT-30
Speed Position
BT4-09 on DMT-30 (torque) is illuminated, BT6-04 on
DMR-30 (shift) is illuminated
Axle Functions
NOTE: If axles are fully extended relays #5 and #6
are activated. If both relays are latched there is a 12
volt signal sent to BT4-04 on the DMR-30 and sfBT2-
10 on the SuperFlex. There will be 12 volts at TB7
and the green light (axle extend) light on the upper
controller will be illuminated.
Axle Extend
BT4-07 on DMT-30 illuminated, BT5-11 on DMR-30
illuminated
Input signal at relays #5 and #6
BT4-04 (AEP) on DMR-30, sfBT2-10 on Superflex
illuminated
Axle Retract
BT4-02 on DMT-30 illuminated, BT5-12 on DMR-30
illuminated
Input signal at relays #5 and #6
BT4-04 (AEP) on DMR-30, sfBT2-10 on Superflex
illuminated
Braking
brakes are normally locked when he machine is not
in use. Brakes are unlocked by a charge pressure (26
bar] [380 PSI) from the drive motor. A 12 volt signal is
sent to the brake solenoid by BT7-01 on DMR-30
Tilt
A 12 volt signal is at BT2-07 (tilt signal input) when
the machine is level. If the machine is out of level or
the level sensor fails the machine will stop. Red wire
on level sensor is power in and white wire is signal
out.
Interlocks
There are Four interlocks on the machine.
1. Axle Extend interlock (AEP) indicates axles are
fully extended.
2. Lift Interlock #2 (wired in series with lift interlock
#1 for safety redundancy).
3. Lift Interlock #1 (A12 Volt signal is sent to BT4-02
on DMR and sfBT2-3 on Superflex when boom is
stowed). Allows high speed travel.
4. Telescope interlock (at tail end of boom). A 12
volt signal is sent to BT2-12 on DMR and sfBT2-4
on Superflex when boom is fully retracted. Allows
high speed travel.
4.4 H
YDRAULIC
T
ROUBLESHOOTING
The SB80 has Two independent hydraulic systems.
One for drive functions and one for lift functions.
All lift, axle and steering pressures can be verified by
connecting a 207 bar (3000 PSI) gauge to L.S. port
on main valve block.
WARNING
!
!
Counterbalance valves must never be removed
if platform is raised and hydraulic system is
under pressure. Be sure platform is completely
stowed before removing counterbalance valves.
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