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 TM 5-5420-279-23
Relax Mechanism
does not operate
For Relax Mechanism to operate the following
conditions m ust be satisfied:-
*
Neutral gear selected
*
Parking brake applied
*
Tail Lift Pendant connected & powered
*
4 Position Switch at position 4
*
Chest pack connected & powered
*
Ensure E-STOP RESET satisfactory
*
A-Fram e unfolded
*
A-Fram e rotated
*
Slide Fram e extended
*
Relax Pins in and Lim it Switches open
Power down & replace
defective Interface
Perform
No
Enclosure. To replace
lam p test on
Interface Enclosure see
Operator Panel. Are all
m aintenance procedure
lamps lit?
5-098
Yes
Are Lim it
Is
Adjust / replace Lim it
Switches LS6 & LS7
solenoid SV25
Switches LS6 and
No
No
operating correctly? See wiring
caption lit on
LS7 as appropriate.
diag G406-8604 sheet 2 at
Operator
See m aintenance
Panel?
procedure 5-094
Yes
Yes
Yes
Is
Disconnect connector
Insert probes of DMM
solenoid SV25
No
from solenoid SV25.
into sockets 1 & 2 of
connector LED lit on the
See m aint procedure
connector
Interface
5-141
Manifold?
Yes
Yes
Is 24V
Disconnect connector
solenoid supply
from solenoid SV25.
present?
See m aint procedure
5-141
No
Power down & check
Replace solenoid
harness continuity from
Connect DMM across
harness if connector
solenoid SV25 to Interface
solenoid coil pins.
LED not lit. See
Enclosure using the cable
See resistance check in
m aintenance procedure
routing tables in section 3.6
maint procedure 5-124
5-139
of Chapter 3
Replace faulty harness or
interface enclosure as
appropriate using the following
Go to
m aintenance procedures:-
Part 2
Harness 5-139
Interface Enclosure 5-098
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