Test The Auxiliary Lowering - Genie TMZ-50/30 Service Manual

Section 3 • Scheduled Maintenance Procedures
800-610-4101
ActionRental.com
CHECKLIST B PROCEDURES
B-5

Test the Auxiliary Lowering

Testing the auxiliary lowering for malfunctions is
essential for safe machine operation. An unsafe
working condition exists if the auxiliary lowering
function does not operate in the event of a main
power loss.
DC Models:
1 Raise the primary, secondary and jib booms.
Extend the primary boom.
2 Open the function manifold side turntable cover.
3 Locate the extension boom valve on the
function manifold.
Push and rotate to
retract primary boom
3 - 16
Turntable Rotate
Pull for Push for
Secondary Boom
Primary Boom
Jib Boom
Extension Boom
Push and rotate to reset
primary boom retract function
4 Push in and turn fully in a counter clockwise
direction the knob at the center of the extension
boom valve stem. Operate the hand pump with
a push/pull motion.
Result: The extension boom retract function
should operate.
5 Push in and turn fully in a clockwise direction
the knob at the center of the extension boom
valve stem to reset the valve.
The valve spool must be reset for
the primary boom extend function
to operate.
6 Locate the primary boom valve on the function
manifold.
7 Pull out and hold the knob at the center of the
primary boom valve stem. Operate the hand
pump with a push/pull motion.
Result: The primary boom down function should
operate.
8 Release the knob.
9 Locate the secondary boom valve on the
function manifold.
10 Pull out and hold the knob at the center of the
secondary boom valve stem. Operate the hand
pump with a push/pull motion.
Result: The secondary boom down function
should operate.
11 Release the knob.
12 Locate the jib boom valve on the function
manifold.
TMZ-50/30
June 2005
REV B
Part No. 65162