CSN784 – Incorrect Counterbalance Valve Installed – 2006-2020 Altec AH150 & AH125S Articulating Non-Overcenter Aerial Devices

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Altec Industries, Inc.
HiLine Operations
Duluth, MN
Customer Service Notice
January 8, 2021
CSN 784
Altec Use Only
Parts Kit
Part Number
Qty
Warranty
Counterbalance valve replacement kit
991221321
2
Yes
Counterbalance valve cartridge
002090115
A/R
Yes
Altec Use Only
Inspection labor
0.5 hr
Repair labor
1.0 hr
Account #
010.1953.43151.000.9125.000
Travel
Not included
NHTSA code
98
Prime fail P/N
002090115
Doc ref
074900740
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CSN 784
Unit Inspection Procedure
No tools are required for this 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.
2. Remove any tools and equipment below the main lift cylinders near the turntable to allow
access for inspection of the counterbalance valves in the cylinders (refer to Figure 1).
Figure 1 — Locating Main Lift Cylinders
3. Find the the counterbalance valve manifold blocks, located on the inboard side of each main
lift cylinder near the turntable (refer to Figure 2).
Figure 2 — Locating Counterbalance Valve Manifold Blocks
Counterbalance Valve Manifold Blocks
Turntable
Main Lift Cylinders
Location of Counterbalance Valves
Turntable
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CSN 784
4. Locate the extend counterbalance valve in the manifold block on each cylinder.
• On the street side cylinder, this is the lower cartridge in the manifold block (refer to Figure
3).
• On the curb side cylinder, this is the upper cartridge in the manifold block (refer to Figure
4).
5. Inspect both extend counterbalance valves.
• If there is a tamper-resistant cover on the end of the cartridge, the counterbalance valve is
correct (refer to Figure 5).
• If the jam nut is visible on the end of the cartridge, the counterbalance valve is incorrect
(refer to Figure 6).
6. Review the results of the inspection in steps 4 and 5.
• If either or both counterbalance valve cartridges are incorrect, order one Counterbalance
Valve Replacement Kit, part number 991221321, per nonconforming valve. Call 1-877-
GO ALTEC (1-877-462-5832) to order the number of kits needed, and to schedule the
installation if it will be performed by Altec. Take the unit out of service until the kit(s)
have been installed. Do not complete the Evaluation Sheet at the end of the CSN.
• If both counterbalance valve cartridges are correct, return the unit to service. Complete
the Evaluation Sheet at the end of the CSN.
Extend Counterbalance
Valve
Street Side Cylinder
Figure 3 — Inspecting Street Side Cylinder
Curb Side Cylinder
Extend Counterbalance
Valve
Figure 4 — Inspecting Curb Side Cylinder
Tamper-Resistant Cover
Figure 5 — Correct Counterbalance Valve
Jam Nut
Figure 6 — Incorrect Counterbalance Valve
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CSN 784
Inventory Inspection Procedure
No tools are required for this inspection. Read and understand all steps of the instructions before
beginning the procedure.
1. Remove all part number 002090115 counterbalance valves from inventory.
2. Remove a counterbalance valve from its box and inspect the end of the cartridge.
• If there is a tamper-resistant cover on the end of the cartridge, the counterbalance valve is
correct (refer to Figure 5).
• If the jam nut is visible on the end of the cartridge, the counterbalance valve is incorrect
(refer to Figure 6).
3. Repeat step 2 for each counterbalance valve cartridge removed from inventory.
4. Count the number of incorrect cartridges, and dispose of them. Call 1-877-GO ALTEC (1-
877-462-5832) to order the number of part number 002090115 cartridges required to replace the
incorrect parts. These will be replaced under warranty. Do not complete the Evaluation Sheet at
the end of the CSN.
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CSN 784
CSN 784 Unit Inspection Sheet
Company Name: _______________________________________________ Phone____________________________
Service Company Name:_ ________________________________________ Phone:___________________________
Company Contact: _ ________________________________________________________________________________
Company Street Address:_____________________________________________________________________________
City ______________________________________________ State:_________________ ZIP Code:_ _______________
Signature:_ ____________________________________________________
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 product.safety@altec.com
• FAX to 1-877-659-9929
*Customer performed warranty can be submitted online for reimbursement
through Altec Connect.
To login to your existing
Altec Connect account,
scan here with your
smart phone!
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.
Model Altec Unit Date Inspected
Serial Number

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