Terex Utilities

PRODUCT NOTICE
DATE:

4/14/2021

PN689
REVISED:

TO: Owners, Users, Dealers, and Installers
MODELS AFFECTED:
SUBJECT:

TL80, TL80/112, & TL100

Leveling System

Issue:
Terex Transmission TL models TL80, TL80/112, & TL100 aerial devices, produced from March 2019
through August 2020 may have unsatisfactory performance of the leveling system due to leveling cylinder
bypassing. Failure to correct the indicated issues may result in the platform not leveling properly.

Action:
What the Owner Must Do:
The owner must inspect their equipment and correct if required:
1. Immediately inform all users, operators, and supervisors that the leveling system must be
inspected daily before use.
2. Inspect the unit’s leveling system to determine if it has the following conditions using the figures
as reference. The conditions below apply to all Transmission TL models (TL80, TL80/112, and
TL100).
• Addition of a leveling system bleed kit – Field Service Kit Z1584
Leveling bleed kit may have been added to allow any trapped air to be bled from
the leveling circuit. Trapped air could result in delayed leveling response. If either
method shown below was installed, the bleed kit is not needed.

Bleed valve at
upper controls
Figure 1. Bleed kit with bleed valve
at upper controls

Terex South Dakota, Inc.
3140 15th Ave SE
Watertown, SD 57201 USA
1-844-837-3948 • Fax 1-605-882-1842

Figure 2. Bleed kit with quick
couplers at boom tip

•

Replacement elbow leveling cylinder (Field Service Kit Z1607) and boom-tip leveling
cylinder (Field Service Kit Z1608)
Inspect elbow and boom-tip leveling cylinders to identify the leveling cylinder using
the figures below. If both cylinders have the smooth weld transition from the rod
eye to the rod, the cylinders do not need to be replaced.

Cylinder rod eye
with weld hump
between rod eye
and rod to be
replaced.
Figure 4. Cylinder to be replaced

Figure 3. Elbow leveling cylinder
location

Cylinder rod eye
with smooth weld
transition
between rod eye
and rod is correct.

Figure 5. Boom-tip leveling cylinder
location

•

Figure 6. Cylinder that is correct

Boom-tip leveling cylinder support boss inside weld – Field Service Kit Z1609
Some boom-tip leveling cylinder support bosses may not have been welded on
the inside of the boom.
CYLINDER BOSS

INSIDE WELD

INSIDE WELD

Figure 7. If the boom-tip leveling cylinder support bosses are
not welded on the inside as shown, this bulletin applies

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•

Addition of a relief for the isolation valve – Field Service Kit Z1611
The isolation relief valve for the leveling circuit is being added to protect the elbow
leveling cylinder from damage in case the operator functions boom controls while
also using the manual leveling control.

Relief valve on turntable; A valve
body with one (1) relief cartridge.

Figure 8. If the valve shown is
present, this bulletin may not apply

3. If all of the above leveling updates have not been completed, the unit must not be used unless
the instructions in the continued use section below are followed.
4. If all of the above leveling updates have been completed, the unit can be used following all
operator, maintenance, and inspection requirements as specified in the manuals provided all
other items in this bulletin are completed.

Continued Use:
Inform the users of the content of this bulletin and remind them of the daily pre-shift inspection
requirements.
1. Inspect the leveling system daily per the manual before use: for any damage to leveling
components and for proper function of the leveling system when the boom is operated through its
full range of motion. If there is no damage to any leveling system component and the leveling
function performs properly, machine use can continue until Field Service Kits Z1584, Z1607,
Z1608, Z1609, and Z1611 are completed following all operator, maintenance, and inspection
requirements as specified in the manuals. If any leveling component is damaged or the leveling
system does not operate properly do not use the machine until Field Service Kits Z1584, Z1607,
Z1608, Z1609, and Z1611 are completed.
2. Within 10 days of receiving this bulletin contact Terex Utilities; through your nearest TEREX
Utilities dealer as shown on the web site, terexutilities.com, call Terex Utilities Warranty
Department at 1-844-837-3948 or by email at [email protected] to arrange for repair.
3. Always follow inspection and maintenance requirements as specified in the manuals.

What Terex will Do:
Terex will provide the Field Service Kits listed below, parts and labor, at no cost to the customer through
December 31, 2021. The Field Service Kits make the following improvements:

•
•
•
•
•

Z1584 – Bleed kit for leveling system
Z1607 – Replacement elbow leveling cylinder
Z1608 – Replacement boom-tip leveling cylinder
Z1609 – Boom-tip leveling cylinder pin boss weld (no parts required)
Z1611 – Add relief valve to rod end of elbow leveling cylinder circuit

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Contact Terex Utilities; through your nearest TEREX Utilities dealer as shown on the web site,
terexutilities.com, call Terex Utilities Warranty Department at 1-844-837-3948 or by email at
[email protected] to arrange for repair within 10 days of receiving this bulletin. If you have
sold the unit involved in this bulletin forward this bulletin to the new owner within 10 days and notify Terex
of the serial number and contact information for the new owner.
Dealers and Installers: A letter is being sent to owners of affected units. If affected units are in your
area TEREX Utilities will contact you to arrange the repairs. Inform owners it may take approximately 6
hours for all repairs if needed.
The TL80, TL80/112, & TL100 models are involved with the leveling issues. If the owner contacts you
call TEREX Utilities Warranty Department at 1-844-837-3948 for instructions and to arrange shipment of
parts.
Affected units, as shown on the owner letter, will have the repairs performed at no charge to the owner.
Free replacement is not mandatory for upgrades or improvements.
Important: Some of the involved units may be in rental fleets. Terex requires you to complete the
service on these units before renting, or to inform the renters within 10 days of receipt of this bulletin.
Terex and local industry standards (CSA and ANSI) requires that the purchaser of a Terex unit report to
Terex the model and serial number of each machine sold, as well as the name, address, and telephone
number of the new owner, within 60 days of the sale. Use the Owner Update Form in the manual to
update the owner status of any of your machines. Terex also asks the seller to provide the new owner
information so if you require additional copies of the Owner Update Form or have any questions, please
contact TEREX Utilities Warranty Department at 1-844-837-3948 or [email protected].
Terex, OSHA and local industry standards require that the manufacturer’s bulletins be completed. It is
important for everyone to communicate this important information to all machine owners. If you require
additional copies of this bulletin or have any question, please contact Terex Utilities at 1-844-837-3948.

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