Test The Function Pump - Gs-69 Be And Gs-69 Dc; Test The Oscillate Axle - Gs-90 - Terex Genie GS-2646 AV Maintenance Manual

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June 2022
A-2
A-2 T est th e F uncti on Pu mp - GS-6 9 BE and GS-6 9 DC
Test the Function Pump
GS-69 BE and GS-69 DC
Genie specifications require that this procedure be
performed annually.
Proper pump function is essential to safe oscillate
operation and machine function.
Note: Perform this procedure on a firm, level
surface with the platform in the stowed position
and the platform extension deck fully retracted.
1
Lower the platform to the stowed position.
2
Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position at both ground and platform controls.
3
At the ground controls, record the time it takes
to fully raise the platform.
Result: The time to fully elevate the platform is
at or less than the table shown below. The
efficiency of the function pump is good.
GS-2669
GS-3369
GS-4069
Result: The time to fully elevate the platform
is greater than the table shown above, Refer
to Repair Procedure in the appropriate
Service and Repair Manual for your machine,
How to Set Up the Machine from Ground
Controls. Repeat the above procedure.
Note: If the above times can not be achieved, the
machine must be tagged and removed from
service until the function pump is repaired or
replaced.
Tip-over hazard. Failure to
repair or replace the function
pump as instructed could
compromise the stability of the
machine resulting in death or
serious injury.
Part No. 1272215GT
Annual Maintenance Procedures
A-3
A-3 T est th e Oscilla te Axle - GS- 90

Test the Oscillate Axle - GS-90

Genie specifications require that this procedure be
performed annually.
The oscillate system is designed so that all four
tires maintain firm contact to the ground on unlevel
terrain improving traction and machine stability.
Proper axle oscillation is essential to safe machine
operation. If the axle oscillation system is not
operating correctly, the stability of the machine is
compromised and it may tip over.
Note: Perform this procedure on a firm, level
surface with the platform in the stowed position in
a safe, secure location away from obstacles and
with an area working height of 20 ft / 6 m.
Note: The outrigger, if equipped, must be fully
retracted.
1
Disconnect and remove the platform controller
from the platform.
2
Open the ground control panel door and
55 seconds
locate the cable connector below the ground
controls. Unplug the control cable from the
60 seconds
ground control plug and connect the platform
94 seconds
controller to the cable.
3
Remove the two retaining fasteners from the
ground control panel and set aside. Tilt the
control panel out towards you exposing the
wiring and relays.
Scissor Lifts
Maintenance Manual
53

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