210 Inverness Center Parkway
Birmingham, AL 35242

Telephone: 205-991-7733
Facsimile: 205-991-9993
www.altec.com

This notice applies to your vehicle. See attached serial number list.

Dear Altec Owner,

April 9, 2021

Altec Industries, Inc. has developed a product improvement which relates to AC40 cranes equipped with a personnel platform built between February 2014 and November 2020.
Refer to SIL 796 for the items covered under the warranty policy. Altec will supply the necessary parts to correct this condition free of charge.
In order to determine if your unit is affected by SIL 796, compare the serial number of your unit with the list
of affected units attached to the SIL. The product improvement can be performed by the customer or you may
contact Altec at 1-877-GO-ALTEC (1-877-462-5832) for further assistance.
At any time, you may contact Altec at 1-877 GO ALTEC (1-877-462-5832) with your unit’s serial number to
determine if there are any other outstanding notices.
If you have sold or retired the unit, please call Altec at 1-877-GO-ALTEC (1-877-462-5832) so the records may
be changed.
We regret this inconvenience; however we are taking this action in the interest of your safety and continued
satisfaction with Altec products.
Thank you for your immediate attention on this important matter.

Altec Industries, Inc.
Roanoke Operations
Daleville, VA

SIL 796

Service Information Letter
April 9, 2021
Units Affected: AC40 cranes equipped with a personnel platform built between February 2014 and November 2020 (Verify that your unit serial number is affected by reviewing the attached list in this SIL or
by accessing your fleet on connect.altec.com/login)

Platform Yoke Inspection
Altec is committed to providing our customers safe and reliable products from initial delivery throughout
the useful life of the unit.
Altec has discovered that cracks may have formed in the yoke of the platform assembly on some units. Although the cracks do not compromise the structural integrity of the platform assembly, Altec will provide
a replacement yoke if cracks are found.
Altec requires the platform yoke to be inspected on each unit. The inspection and repair must be completed no later than 90 days after receipt of this SIL. Use the Inspection Procedure beginning on page 2. If the
yoke does not pass the inspection, remove the platform assembly from service. Order the Platform Yoke
Replacement Kit, part number 991283643, by calling 1-877-GO ALTEC (1-877-462-5832). Return the
unit to service without the platform assembly, and install the kit as soon as it is received.
The inspection and repair are covered under the Altec Warranty Policy and can be performed by Altec, the
customer, or the customer’s warranty provider. The repair requires lifting equipment rated for 250 pounds
to replace the yoke if the platform is installed on the boom tip or 750 pounds if the platform is stowed on
the bed of the unit. After completing the repair, a 150% proof test is required with 1,800 pounds of test
load evenly distributed in the platform. Altec will perform the inspection and repair for free at an Altec
facility. If the customer or the customer’s warranty provider performs the work, a warranty claim must be
submitted to be reimbursed for the cost of the parts and/or labor. Altec will allow up to $45 for the labor
to perform the inspection and up to $540 for the labor to perform the kit installation. Call 1-877-GO ALTEC (1-877-462-5832) to schedule the work to be done by an Altec service technician. The customer is
responsible for the travel costs of an Altec Mobile Service technician if the technician performs the work
at the owner’s location.

Inspection labor
Repair labor
Account #
Travel
NHTSA code
Prime fail P/N
Doc ref

Altec Use Only
0.5 hr
6.0 hr
010.0994.43151.477.0000.000
Not included
98
970420871
074900757

Altec Use Only
Parts Kit
Part No.
991283643
Platform yoke replacement kit

Page 1 of 4

Qty
1

Warranty
Yes

SIL 796

Inspection Procedure
A cleaning solution and rags and a bright light are required for this procedure. Read and understand all steps of the instructions before beginning the procedure.
1. Position the unit on a level surface. Apply the parking brake and chock the wheels.
2. Determine where the platform assembly is located.
• If the platform assembly is stored on the bed of the unit, proceed to step 3.
• If the platform assembly is attached to the boom tip, position it for inspection.
a. Engage the unit’s hydraulic system.
b. Properly set the outriggers in the
full span configuration.
c. Move the boom to position the
platform close to the ground.
Boom Tip
d. Disengage the unit’s hydraulic
Mounting
system.
Bracket
Hex Tube

3. Turn off the engine and remove the
key from the ignition.
4. Thoroughly clean the welded joints
of the yoke all along the front and
back of the hex tube and all around
the outside of the hex tube where it is
welded to the arms and to the boom
tip mounting bracket (refer to Figure
1). Remove all dirt, grease, and other
contaminants.

Arm

Yoke

Platform
Figure 1 – Platform Assembly

5. Using a bright light, inspect for visible cracks in the welds and at the weld-to-parent material
joints at the locations on the yoke specified below.
• Seam welds all along the front and back of the hex tube (refer to Figure 2)
• Fillet welds all around the hex tube on both sides of each arm (refer to Figure 3)
• Fillet welds all around the hex tube on both sides of the four plates in the boom tip mounting bracket (refer to Figure 3)
Seam Welds on Front and Back

Figure 2 – Inspecting Seam Welds
Page 2 of 4

SIL 796

Fillet Welds on Both
Sides of Each Plate

Fillet Welds on Both
Sides of Each Arm
Figure 3 – Inspecting Fillet Welds

6. Review the inspection results.
• If no cracks were found, the yoke has passed the inspection. If the boom was unstowed,
stow the boom and the outriggers. Return the unit to service. Complete the Inspection Sheet
at the end of the SIL.
• If any cracks were found, remove the platform assembly from the unit and take the platform
assembly out of service. If the boom was unstowed, stow the boom and the outriggers.
Order the Platform Yoke Replacement Kit, part number 991283643, by calling 1-877-GO ALTEC (1-877-462-5832). Return the unit to service without the platform assembly, and install
the kit as soon as it is received. Do not complete the Inspection Sheet at the end of the SIL.
7. Continue to inspect the platform assembly regularly as required by the Shift/Monthly Inspection Checklist located in the Appendix of the Operator’s Manual.

Page 3 of 4

SIL 796

SIL 796 Platform Yoke Inspection Sheet
Complete this form and return to Altec to document inspection completion.
Choose one of these options.
• Online through the customer portal – Altec Connect*
Sign in or Register for an account at www.altec.com/altec-connect/
1. Select Equipment
2. Select Altec Product Notices
3. Select Report a Completed APN
• Scan and Email to [email protected]
• FAX to 1-877-659-9929
*Customer performed warranty can be submitted online for reimbursement
through Altec Connect.
Model

Altec Unit
Serial Number

To login to your existing
Altec Connect account,
scan here with your
smart phone!

Date Inspected

Company Name: _______________________________________________

Phone____________________________

Service Company Name:_________________________________________

Phone:___________________________

Company Contact: _________________________________________________________________________________
Company Street Address:_____________________________________________________________________________
City _______________________________________________ State:_________________ ZIP Code:________________
Signature:_____________________________________________________

Submission of this form does not order parts or schedule service from Altec.
If the customer or the customer’s warranty provider performs the repair, a warranty claim must be submitted to be reimbursed for the cost of the parts and/or labor through Altec Connect.
For more information or to schedule the work to be done by an Altec Service technician, call:
1-877-GO ALTEC (1-877-462-5832)
Make copies of this form for additional units if needed.
Page 4 of 4