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 SIL for specific unit identification.

Dear Altec Owner,

January 13, 2021

Altec Industries, Inc. has developed a product improvement which relates to certain AH75/85/100 and
AH75A/85A/100A aerial devices built from January 2010 to April 2020.
Refer to SIL 764 for items covered under the warranty policy. Altec will supply necessary parts to correct this
condition.
In order to determine if your unit is affected by SIL 764, compare the serial number of your unit with the list of
affected units as described on 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.
HiLine Operations
Duluth, MN

SIL 764

Service Information Letter
January 13, 2021
Units Affected: AH75/85/100 and AH75A/85A/100A aerial devices built from January 2010 to
April 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)

Upper Boom Hose Sock Inspection
Altec is committed to providing our customers safe and reliable products from initial delivery
throughout the useful life of the machine.
Altec has discovered that the protective fabric hose sock in the upper boom hose carrier on the
affected units can become unsecured and slip out of place. This can expose the fiber optic lines
to damage, resulting in intermittent operation or failure of the upper controls.
Altec requires the following actions to be performed on the affected units no later than 30 days
after receiving this SIL.
• Inspect the hose sock in the upper boom using the Inspection Procedure beginning on page 2.
• Have Altec make any required repairs.
The inspection is covered under the Altec Warranty Policy, and can be performed by Altec, the
customer, or the customer’s warranty provider. Altec will perform the work for free at an Altec
facility. If the customer or the customer’s warranty provider performs the inspection, a warranty
claim must be submitted to be reimbursed for the cost of the labor. Altec will allow up to $67.50
for the labor to perform this inspection. 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 inspection at the owner’s location.

Inspection Labor
Repair Labor
Repair Labor
Account #
Travel
NHTSA Code
Prime Fail P/N
Doc Ref

Altec Use Only
0.75 hr
1.25 hr without partial hose carrier removal
8.0 hr with partial hose carrier removal
010.0953.43151.000.9080.000
Not included
98
None
074900728

Parts Kit
Instructions, Upper Boom Hose
Sock Securement

Page 1 of 6

Part Number Qty
074900728
1

Warranty
n/a

SIL 764

The repair is covered under the Altec Warranty Policy and must be performed by Altec. Altec
will perform the work for free at an Altec facility. Call 1-877-GO ALTEC (1-877-462-5832) to
schedule the work to be done by an Altec service technician. Customers are responsible for the
travel costs of an Altec Mobile Service technician if the technician performs the repair at the
owner’s location. If the inspection indicates that the upper boom hose carrier requires partial
removal, the repair must be performed by Altec at an Altec facility equipped with work platform
steps or a scissor lift of sufficient height to reach the boom elbow.
Inspection Procedure
Normal mechanic’s hand tools including a
tape measure are required for the inspection.
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.
Turn off the engine and remove the key
from the ignition.

Fasteners
Cover

2. Remove the fasteners at the top of the
boom elbow cover (refer to Figure 1) and
allow the cover to unfold and hang down.
Retain the fasteners for reuse.

Boom Elbow

Figure 1 – Opening Boom Elbow Cover

3. Look at the position of the left turnaround manifold in the elbow opening.
• If the left manifold is positioned as shown in Figure 2, the upper boom is fully retracted. Proceed
to step 4.
• If the left manifold is farther inside the boom than shown in Figure 2, the upper boom is not fully
retracted. Retract it as described below.
a. Start the engine and engage the unit’s hydraulic system.
b. Move the aerial device/outriggers selector at the tailshelf to Outriggers.
c. Properly set the outriggers.
d. Move the aerial device/outriggers selector to Aerial Device.
e. Unlatch the manual upper boom restraint, if equipped.
f. Using the lower controls, raise the upper boom a few inches above the upper boom support, fully
retract the upper boom, and lower the upper boom back to the upper boom support.
g. Latch the manual upper boom restraint, if equipped.
h. Disengage the unit’s hydraulic system.
i. Turn off the engine and remove the key from the ignition.

Page 2 of 6

SIL 764
Upper
Telescope
Cylinder
Manifold

Left Turnaround
Manifold with
Upper Boom
Fully Retracted

Right
Turnaround
Manifold

Figure 2 – Components in Boom Elbow

4. Locate the right turnaround manifold in the elbow opening (refer to Figure 2). Inspect the
fabric hose sock installed over the hoses that are connected to the back side of this manifold
and take the described measurement if necessary.
• The hose sock is properly secured if BOTH of the following conditions are true (refer to Figure 3).
- The hose sock has one or two cable tie(s) around it near the end.
- The distance from the end of the hose end fitting swivel nuts to the end of the hose sock is from
0" to 4".
• The hose sock needs to be secured if EITHER of the following conditions is true (refer to
Figure 4).
- The hose sock has no visible cable tie(s) around it near the end.
- The distance from the end of the hose end fitting swivel nuts to the end of the hose sock is
greater than 4".
Distance from End
of Swivel Nuts to
End of Hose Sock
Is from 0" to 4"
(¹/2" Is Shown)

Aluminum Tube
Hose Sock
Cable Tie
Hose End Fitting
Swivel Nuts

Right Turnaround
Manifold

Figure 3 – Properly Secured Hose Sock at Right Manifold
Page 3 of 6

SIL 764
Aluminum
Tube

Hose Sock

Right Turnaround
Manifold

Hose End Fitting
Swivel Nuts

Figure 4 – Unsecured Hose Sock at Right Manifold

5. Locate the left turnaround manifold in the elbow opening (refer to Figure 2). Inspect the fabric hose sock installed over the hoses that are connected to the back side of this manifold and
take the described measurement if necessary.
• The hose sock is properly secured if BOTH of the following conditions are true (refer to Figure 5).
- The hose sock has one or two cable tie(s) around it near the end.
- The distance from the end of the hose end fitting swivel nuts on the two upper hoses to the end of
the hose sock is from 0" to 4".
• The hose sock needs to be secured if EITHER of the following conditions is true.
- The hose sock has no visible cable tie(s) around it near the end.
- The distance from the end of the hose end fitting swivel nuts on the two upper hoses to the end of
the hose sock is greater than 4".
Upper Hoses
Hose End Fitting
Swivel Nuts

0" to 4" to End of
Hose Sock
Left
Turnaround
Manifold
Figure 5 – Properly Secured Hose Sock Position at Left Manifold
Page 4 of 6

SIL 764

6. Install the boom elbow cover.
7. Determine the required action a, b, or c as shown in Figure 6 based on the inspection results
in steps 4 and 5.
Hose Sock at Right Manifold Hose Sock at Left Manifold
Securing Not
Securing
Securing Not Securing
Required
Required
Required
Required
X
X
a

X
X
b
X
X
c

X
X
c
Figure 6 – Inspection Results and Required Actions

Required Action:
a. Return the unit to service. Complete the Inspection Sheet at the end of this SIL and return
it to Altec as specified.
b. Call 1-877-GO ALTEC (1-877-462-5832) to schedule to have the unit repaired according
to the part number 074900728 Instructions for Upper Boom Hose Sock Securement. This
can be done by an Altec Mobile Service technician or at an Altec facility. Partial removal
of the upper boom hose carrier is not required. Return the unit to service until the repair
is performed. Do not complete the Inspection Sheet at the end of this SIL.
c. Call 1-877-GO ALTEC (1-877-462-5832) to schedule to have the unit repaired according
to the part number 074900728 Instructions for Upper Boom Hose Sock Securement. This
must be done at an Altec facility equipped with work platform steps or a scissor lift of
sufficient height to reach the boom elbow. Take the unit out of service until the repair is
performed. Do not complete the Inspection Sheet at the end of this SIL.

Page 5 of 6

SIL 764

SIL 764 Inspection Sheet
Complete this form and return it to Altec to document inspection completion only if both ends
of the hose sock are properly secured.
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

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 6 of 6