Test The Manual Override - Genie TZ-34/20 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-4

Test the Manual Override

Testing the manual override for malfunctions is
essential for safe machine operation. An unsafe
working condition exists if the manual override
function does not operate in the event of a main
power loss.
1 Locate the primary boom up/down valve at the
manifold on the ground controls side of the
machine. Push the thumbscrew in and turn fully
in a clockwise direction to open the valve.
Result: The thumbscrew should move easily.
Turntable rotate
Primary boom extend/retract
Primary boom up/down
Secondary boom up/down
Ground controls side
2 To close the valve, push the thumbscrew in and
turn fully in a counterclockwise direction and
release.
3 Pull the thumbscrew out and turn fully in a
clockwise direction to open the valve.
Result: The thumbscrew should move easily.
3 - 12
4 To close the valve, pull the thumbscrew out and
turn fully in a clockwise direction and release.
Note: The machine functions will not operate
unless the valves are closed.
5 Locate the secondary boom up/down valve at
the manifold. Push the thumbscrew in and turn
fully in a clockwise direction to open the valve.
Result: The thumbscrew should move easily.
6 To close the valve, push the thumbscrew in and
turn fully in a counterclockwise direction and
release.
7 Pull the thumbscrew out and turn fully in a
clockwise direction to open the valve.
Result: The thumbscrew should move easily.
8 To close the valve, pull the thumbscrew out and
turn fully in a counterclockwise direction and
release.
Note: The machine functions will not operate
unless the valves are closed.
9 Locate the primary boom extend/retract valve at
the manifold. Push the thumbscrew in and turn
fully in a clockwise direction to open the valve.
Result: The thumbscrew should move easily.
10 To close the valve, push the thumbscrew in and
turn fully in a counterclockwise direction and
release.
Genie TZ-34/20
January 2016
Part No. 825934