Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
SIL-3214
Service Bulletin/Repair Instructions
Altec has learned that the king pin towing capacity placard might not be installed on certain DL derricks built from August 2005 to October 2024. This could lead to unintentional overloading which could result in cracks or deformations to the king pin assembly. Altec has had no reports of this issue occuring. This area should be inspected regularly as outlined in the Welds and Fasteners subsections in Section 4 of the unit’s Maintenance and Parts Manual.
SIL-3157
Service Bulletin/Repair Instructions
Altec has learned that the structural subbase welds on certain DH derricks built from July 2016 to December 2023 could contain stitch welds rather than the required continuous welds, which could result in cracks forming in the subbase.
SIL-3143
Service Bulletin/Repair Instructions
Altec has learned that a 12-volt Airtronics relay installed in the PDM could have been manufactured to an insufficient threshold on certain units built from December 2004 to October 2022. This can cause the relay to overheat and fail, causing the accessory lights to stop working.
SIL-3112
Service Bulletin/Repair Instructions
Altec has learned that on certain digger derricks built from January 29, 2015, to December 3, 2020, equipped with a Hetronic radio control system have experienced frequent dropouts or would not connect to the receiver. When the remotes were tested, the radio firmware was found to be at fault. Hetronic has released a new firmware update for radios built beginning in January 2015 that can be flashed onto the radio by Altec Service Technicians.
SIL 3119
Service Bulletin/Repair Instructions
Altec has learned that an incorrect grade auger retention pin could be installed on certain DC, DL, and DM derricks built from July 2015 to August 2023. Over time, this could result in the pin becoming damaged.
CSR 3094
Service Bulletin/Repair Instructions
Altec Industries, Inc. has received notification from an Original Equipment Manufacturer (OEM) that a condition exists relating to motor vehicle safety, compliance, or emissions in a vehicle you possess that is equipped with Altec equipment. Navistar has decided that a defect which relates to motor vehicle safety exists in certain 2017 thru 2020 DuraStar and WorkStar model trucks built 01/19/2016 thru 12/20/2019, 2016 and 2017 TranStar model trucks built 12/14/2015 thru 04/12/2016, 2017 thru 2019 ProStar model trucks built 01/13/2016 thru 03/02/2018, 2018 and 2019 LoneStar series trucks built 07/13/2017 thru 02/08/2018, and 2018 and 2019 HC commercial buses built on 08/07/2017 thru 10/25/2018. The Heating, Ventilating, and Air Conditioning (HVAC) system blower motor circuit may have been built with a wire terminal that does not meet the electrical current requirements for the blower motor circuit. This can cause overheating that may melt the plastic material of the fuse block for the HVAC circuit and subsequent damage of the surrounding area of the Power Distribution Module (PDM) and/or dash panels.
SIL 3068
Service Bulletin/Repair Instructions
Altec has learned that certain digger derricks and aerial devices of various models built from January 2010 to January 2023 may contain access steps with a handrail and side plate that come together in a small space causing a potential pinch point. Altec has created a kit to eliminate the possible pinch point.
SIL 850
Service Bulletin/Repair Instructions
The body compartment wiring on certain Altec aerial devices, digger derricks, and body-only units built from 2014 to 2021 contains an in-line fuse located close to the lighting in the compartment, while other units are fused upstream, closer to the power source. Altec has learned that the units affected should have an in-line fuse close to the lighting, but this fuse was not installed on some units. In addition, some units may have exposed terminals at the end of certain portions of the wiring in the body. If the exposed terminals contact each other or with ground, the resulting direct short could damage the body compartment lighting. Inspect the body compartment lighting circuit at the unit's next scheduled service interval or within six months of receiving the SIL, whichever comes first. Use the Inspection Procedure or contact Altec to perform the inspection. This inspection and repair are 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 work, a warranty claim must be submitted to be reimbursed for the cost of the parts and/or labor.
SIL 843
Service Bulletin/Repair Instructions
Altec has learned that the lift cylinder pivot pin retainers may bend or break during use on DT80 digger derricks built from March 2007 to October 2021. If the pin retainer fails, the pivot pin will still be held in place in the turntable or lower boom by retaining rings. However, the pin will be able to rotate in the pinning holes during lift cylinder movement. Altec has developed a kit containing high-strength pin retainers to replace the original pin retainers at both ends of the cylinder. The customer should order and install the High-Strength Pin Retainer Kit or schedule the installation of this kit by Altec. Do this no later than the next preventive maintenance interval or 30 days from the receipt of the SIL, whichever comes first. Also ensure that the lift cylinder spherical bearings are regularly greased according to the schedule stated in the Lubrication section in Section 4 of the unitâÂÂs Maintenance Manual. This repair is covered under the Altec Warranty Policy and can be performed by Altec, the customer, or the customerâÂÂs warranty provider. Altec will perform the work for free at an Altec facility.
SIL 852
Service Bulletin/Repair Instructions
Altec has learned that the electrohydraulic outrigger/tools control valve on AA755L and A-series aerial devices and DLB, DMB, and D2/3/4000B series digger derricks could have the potential to produce a very small amount of flow into the lower tools circuit when the outriggers and tools mode is engaged. This can cause slow unintended movement of a tool such as a pole puller cylinder that is connected to the tool circuit. A blanking plug must be installed to prevent this issue. Inspect the outrigger/tools control valve using the Inspection Procedure. 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. Altec will perform the work for free at an Altec facility.
CSR 531
Service Bulletin/Repair Instructions
Altec Industries, Inc. has received notification from Navistar that a condition exists relating to motor vehicle safety, compliance, or emissions in a vehicle you possess that is equipped with Altec equipment. On certain trucks equipped with an automatic transmission, if the automatic transmission is still in drive or reverse position and the stationary PTO switch is engaged, the engine RPM will ramp up and may overcome parking brake hold capability resulting in possible vehicle movement. Unexpected movement of the truck can increase the risk of a crash resulting in property damage or personal injury.
CSR 532
Service Bulletin/Repair Instructions
Altec Industries, Inc. has received notification from Navistar that a condition exists relating to motor vehicle safety, compliance, or emissions in a vehicle you possess that is equipped with Altec equipment. On certain trucks equipped with an automatic transmission, if the automatic transmission is still in drive or reverse position and the stationary PTO switch is engaged, the engine RPM will ramp up and may overcome parking brake hold capability resulting in possible vehicle movement. Unexpected movement of the truck from the park position can increase the risk of property damage or personal injury.
SIL 841
Service Bulletin/Repair Instructions
Altec has learned that on certain derricks built from 2008 to 2020 the diameter of the wire winch rope installed may exceed the maximum allowable diameter specified by the ANSI A10.31 derrick standard based on the winch drum diameter. Use of an oversized wire winch rope can lead to improper rope spooling on the winch drum and premature rope wear.
SIL 799
Service Bulletin/Repair Instructions
A check valve is installed in the control valve for the front bumper winch on certain DC series derricks built from January 2016 through February 2021. Altec has discovered that the check valve has the potential for failure. When the check valve fails, the internal spring can dislodge from the housing and enter the hydraulic system. The hydraulic flow can carry it into the digger/winch control valve and cause one of the spools to bind in the closed position, disabling the function. Altec requires the 035240052 check valve to be replaced no later than the next preventive maintenance interval or 90 days from the receipt of this SIL, whichever comes first.
SIL 803
Service Bulletin/Repair Instructions
A part number 035240052 check valve is installed in two locations on Certain DC series derricks built from January 2016 through February 2021. One check valve is installed in the control valve for the front bumper winch and another check valve is installed in the tandem pump as part of the secondary stowage DC pump option. Altec has discovered that the check valves have the potential for failure. When the check valve fails, the internal spring can dislodge from the housing and enter the hydraulic system. The hydraulic flow can carry it into the digger/winch control valve and cause one of the spools to bind in the closed position, disabling the function. Altec requires the 035240052 check valves to be replaced no later than the next preventive maintenance interval or 90 days from the receipt of this SIL, whichever comes first.
SIL 793
Service Bulletin/Repair Instructions
Altec has discovered that certain DM47B and D3000B Series digger derricks built from July 2017 to May 2019 were not properly stability tested according to the Stability Test Form for Combined Digger Derrick and Platform Use contained in the Unit Installation Manual and in the Maintenance Manual. Altec requires these units to be properly stability tested according to the procedure no later than 6 months after receiving the SIL.
SIL 795
Service Bulletin/Repair Instructions
Some customers have reported cracks occurring in the stationary frame tubes above the chassis frame rails of some HD35A pressure diggers built from 2005 through 2020. Investigation has shown this to be caused by improper orientation of the spacer blocks welded to the bottom of the stationary frame tubes. Altec requires the stationary frame on each unit to be inspected no later than the next preventive maintenance interval. If the inspection shows that the spacer blocks are oriented incorrectly, the unit must be repaired no later than 30 days after the inspection using the Repair Procedure provided in the notification.
CSR 510
Service Bulletin/Repair Instructions
Cummins Inc. has decided that a defect that relates to motor vehicle safety exists in certain B6.7 diesel engines manufactured between December 16, 2015, and March 24, 2020, and equipped with fuel module option FS90301 or FS90453. Cummins has released field Safety Campaign #C2302 "86.7 Engine-Mounted Fuel Heater Safety Campaign" to correct the condition detailed in the attached Cummins communication. This safety recall addresses the potential safety defect for your engine. However, this repair will disable the fuel heater. Cummins is currently working to determine an appropriate cold-weather starting aid for customers that require it. Cummins Distributors and Dealers will be notified when a separate field action is available. Contact the nearest Cummins Distributor or authorized warranty dealer to arrange to have this campaign performed on your engine. In the meantime, to mitigate the safety risk, Cummins has advised action. Altec is not able to complete this repair. All work must be completed by an authorized Cummins Distributor or authorized warranty dealer.
CSR 511
Service Bulletin/Repair Instructions
Certain B6.7 diesel engines manufactured between December 16, 2015 and March 24, 2020 and equipped with fuel module option FS90301 or FS90453 were either delivered with a heater plug in place of the fuel heater, or your vehicle is subject to the recently-released Safety Campaign #C2302 B6.7 Engine-Mounted Fuel Heater Safety Campaign, (Altec Campaign CSR 510) which requires removal or disablement of the fuel heater. Cummins is developing for installation at a future date a new fuel heating solution for customers that require it for cold weather operation. Cummins has not determined the availability date of the new fuel heating solution. Altec is not able to complete this repair or answer questions regarding this safety campaign. All work must be completed by an authorized Cummins Distributor or authorized warranty dealer.
SIL 744
Service Bulletin/Repair Instructions
Service Information Letter 744 notified customers that the mounting hole for the return filter on the hydraulic reservoir was produced over-sized on the affected units. This can cause the O-ring between the return filter head and the reservoir to not seal properly which can result in potential water intrusion. Altec has designed an adapter plate and gasket to provide the correct hole diameter for the proper sealing of the O-ring. Order the Return Filter Seal and Plate Kit, part number 990875329, by calling 1-877-GO ALTEC (1-877-462-5832). Altec suggests that the kit be installed no later than the next regular maintenance interval or 90 days from the receipt of this SIL, whichever comes first. This repair
SIL 677
Service Bulletin/Repair Instructions
This service information letter (SIL) notified customers to inspect the electrical slip ring for proper installation. Slip rings found to be improperly installed are to be replaced.