Terex Utilities

PRODUCT NOTICE
DATE:

4/9/2021

PN694
REVISED:

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

TL80, TL80/112, TL100

Rotation Gearbox Bolt Torque

Issue:
Terex Transmission TL models TL80, TL80/112, and TL100 aerial devices, produced from March 2019
through February 2021, have rotation gearbox bolts that may loosen during use. If the rotation gearbox
bolts loosen, the backlash of the gearbox pinion to rotation bearing increases, causing excessive wear or
damage. Failure to maintain the backlash may result in damage to the rotation system.

Action:
What the Owner Must Do:
1. Inform all users, operators, and supervisors that the rotation gearbox bolts must be visually
inspected daily as instructed in the Operator’s Manual.
2. At the next service interval, increase the torque on the rotation gearbox bolts to 230 ft-lbs. This
applies to all TL80, TL80/112, and TL100 units.

Continued Use:
All machine users and operators must be notified of the following requirements for continued use of
affected machines:
1. The affected machines may remain in service, until the next scheduled service interval, provided
the daily visual inspection does not show any loose fasteners and the rotation system functions
properly.
2. At the next service interval, increase the torque on the rotation gearbox bolts to 230 ft-lbs. This
applies to all TL80, TL80/112, and TL100 units.
3. Always follow inspection and maintenance requirements as specified in the manuals.

What Terex will Do:
Terex will provide Field Service Kit Z1622 (instructional drawing and replacement manual pages) with the
owner letter, for units built prior to March 2021. The rotation gearbox bolts are critical fasteners and must
have the torque checked during the annual inspection per the instructions in the Maintenance Manual.
If you have any questions, 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]. 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.
Terex South Dakota, Inc.
3140 15th Ave SE
Watertown, SD 57201 USA
1-844-837-3948 • Fax 1-605-882-1842

Dealers and Installers: A letter is being sent to owners of affected units. Only Terex TL80, TL80/112,
and TL100 models are involved. If the owner contacts you with questions, call TEREX Utilities Warranty
Department at 1-844-837-3948 for Field Service Kit Z1622 instructional drawing and replacement manual
pages.
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].

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