2020 Oshkosh S-Series
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
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Vehicles › Oshkosh › S-Series › 2020
These records cover every 2020 Oshkosh S-Series. To see whether one car still needs a recall repair, decode its VIN or check it with NHTSA.
Recalls
7 recalls name the 2020 Oshkosh S-Series. Newest first.
Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series 2.0 Concrete Mixers. Incorrectly installed alternator electrical cable clamps may rub against the vehicle frame or hydraulic hose, possibly damaging the alternator cables.
Risk and remedy
Risk
Damaged alternator electrical cables can increase the risk of a fire.
Remedy
Oshkosh will provide instructions on how to inspect the wiring, reposition the clamps, and properly secure the cables. The repair can be performed by the owner or an Oshkosh service center, free of charge. Owner notification letters were mailed on June 23, 2022. Owners may contact Oshkosh's customer service at 1-888-686-7278.
Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series vehicles. The fuel tubes between the fuel rail and the injector for cylinders 4, 5 and 6 may be susceptible to cracking, resulting in a high pressure fuel leak.
Risk and remedy
Risk
A high pressure fuel leak in the presence of an ignition source may increase the risk of a fire.
Remedy
On engines with 75 miles or less, dealers will install vibration isolators to the fuel tubes. Engines with more than 75 miles will receive new fuel tubes with vibration isolators. Repairs will be performed free of charge. Owner notification letters are expected to be mailed February 1, 2022. Owners may contact Oshkosh customer service at 1-8088-686-7278.
Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series vehicles. The u-bolts securing the front axle may fail.
Risk and remedy
Risk
Bolt failure may allow the front axle to shift or detach, increasing the risk of a crash.
Remedy
Oshkosh will provide new u-bolts, free of charge. Owner notification letters were mailed February 24, 2022. Owners may contact Oshkosh customer service at 1-888-686-7278.
Oshkosh Corporation (Oshkosh) is recalling certain 2020-2021 S-Series vehicles. A machining defect may cause pressure to build in the power steering pump and break the shaft seal, resulting in a loss of power steering assist.
Risk and remedy
Risk
A loss of power steering assist increases the risk of a crash.
Remedy
Owners will inspect and replace the power steering pump as necessary. Owners may perform this work themselves or reach out to one of our service centers to perform the inspection and repair work free of charge. Owner notification letters were mailed on December 15, 2021. Owners may contact Oshkosh customer service at 1-888-686-7278.
Oshkosh Corporation (Oshkosh) is recalling certain 2019-2022 S-Series vehicles. These vehicles were manufactured with 10 amp Anti-Lock Brake System (ABS) fuses, instead of the required 15 amp ABS fuses.
Risk and remedy
Risk
The incorrectly sized fuse may blow during an ABS braking event, increasing the risk of a crash.
Remedy
Oshkosh will provide owners new fuses, a new fuse label, and installation instructions, free of charge. Owner notification letters were mailed on July 29, 2021. Owners may contact Oshkosh customer service at 1-888-686-7278.
Oshkosh Corporation (Oshkosh) is recalling certain 2020-2021 S-Series vehicles. The rear axle output shaft may not have been heat-treated properly, which could cause the shaft to fracture.
Risk and remedy
Risk
A fractured rear output shaft may cause the shaft or interaxle driveline to detach from the vehicle, increasing the risk of a crash or injury.
Remedy
Oshkosh will notify owners, and owners will be instructed to inspect the output shaft, and if necessary, order a new one and replace it, free of charge. The recall began on March 31, 2021. Owners may contact Oshkosh customer service at 1-888-686-7278.
Oshkosh Corporation (Oshkosh) is recalling certain 2020 S-Series vehicles equipped with Bendix pressure switches. The plastic threads holding the two halves of the pressure switch may strip when the switch is pressurized, resulting in an air leak which, if severe enough, can cause the air system to lose pressure when the brakes are applied. Failure of the…
Risk and remedy
Risk
As a result of a pressure switch air leak, the braking distance may be diminished and/or the parking brake may automatically engage. If the vehicle is equipped with an affected brake switch on both the front and the rear brakes and both parts fail, the brake lights may not operate. These conditions may increase the risk of a crash.
Remedy
Oshkosh will notify owners, and dealers will inspect the brake pressure switch and replace it as necessary, free of charge. The recall began September 28, 2020. Owners may contact Oshkosh customer service at 1-888-686-7278.
Service bulletins
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
- 11009675This bulletin provides instructions for performing an Over The Air Programming (OTAP) vehicle software update.
- 11005684This bulletin provides instructions to seal around the HVAC fresh air intake and drains ports, and install a deflector bracket to prevent water ingress into the cab.
- 11005683This bulletin provides instruction for updating the Medallion instrument cluster software version to a new version updating the high transmission temperature icon and alarm to match the Allison high-temp fault settings. The alarm activates when the TCM detects one of the following over-temperature conditions in the transmission sump.
- 10246254This bulletin provides instructions for installing rubber hose STAUFF clamps in areas of the vehicle that have hard line STAUFF clamps installed on rubber hoses. Rubber hose STAUFF clamps have a smooth inner contact surface and filleted edges. Installing rubber hose STAUFF clamps will reduce potential hose chaffing in areas where hard line clamps were installed
- 10246253This bulletin provides instructions for installing new updated front shock absorbers and upper mounting brackets. The updated shock absorber and mounting bracket lowers the top of the shock absorber improving the allowable maximum travel of the front leaf spring pack and keeps the shock absorber in its normal travel zone reducing the time the shock absorber is in hydraulic rebound
- 10244977This bulletin provides instruction for installing a hydraulic system charge pump filter.
- 10240400This bulletin provides information on updating hydraulic hose clamping below the cab to match current production. Engineering recommends changing out the front STAUFF clamp using the following procedure. The second STAUFF clamp can be changed out using this procedure if desired.
- 10235770This bulletin provides information on topics specific to transmission high temperature warnings reported in the field. The topics listed were helpful in preventing transmission high temperature warning conditions.
- 10232186This bulletin provides instruction for installing an updated cab door switch.
- 10228620This bulletin provides instruction on replacing PDM power bank fuses in the cab, mixer, and rear PDMs. The larger 15 amp fuse protects the system and keeps the whole BCM Bank from dropping out if a bank function shorts-to-ground.
- 10210872The following procedure provides instruction for Fleet Managers to access their vehicle system to: Set the fleet password. Unlock delivery mode. (The fleet password must be entered to unlock delivery mode) Begin a LSTA calibration. (if LSTA equipped) Enter/modify Slump Calibration profiles. View Service level settings. (grayed out at Fleet Manager level) Delete historic fault codes. (requires at least sotware version 8.4.0 and display version 3.0.0) View and set Fleet level options.
- 10207766The following procedure provides instruction for Fleet Managers to access their vehicle system to change parameters.
- 10207765The following procedure provides instruction for Fleet Managers to access their vehicle system change parameters.
- 10198993This bulletin provides information for vehicle owners that have a Dana series 172 or 175 rear axle without a lubricant drain plug in the bottom of the axle housing.
- 10198992This bulletin provides instruction for replacing the mixer pump PTO shaft, mixer pump input yoke, and mixer pump input yoke bearing U-bolts to the current production configuration. The new PTO shaft is larger with greaseable crosses and requires a new mixer pump input yoke and replacing the input yoke bearing U-bolts with bearing straps.
- 10198991This bulletin provides instructions for bolting the water tank mounting feet to the water tank if the bonded feet become loose.
- 10198990This bulletin provides instruction for replacing the water pump impeller due to corrosion. Oshkosh has received reports of non-working water pumps due to the pump impeller becoming corroded and seized, causing the pump not to spin. A new impeller made of an improved alloy was developed to eliminate corrosion issues.
- 10194921This bulletin provides instruction for checking electrical connections at various critical locations. Loose electrical connections can cause false readings and lead to electrical system errors.
- 10194920This bulletin provides instruction on replacing the frame ground stud nut located at the rear of the vehicle on the inside right-hand frame rail. Engineering has changed the nut from a jam nut to a lock nut after receiving reports of the jam nut being loose when inspected.
- 10186129This bulletin provides instruction to update the hydraulic steering system by adding an external pressure relief valve. Field reports of failed steering pump seals led to testing that determined internal recirculation of hot oil was the cause of the seal failures.
- 10186127This bulletin provides instruction to correct an installation error that may damage the battery box power distribution fuses, and updates the fuse identification label.
- 10184144This bulletin provides general information about the v8.2.1/7.6.1 software update that enhances the vehicle?s hydraulic system, auxiliary axles (tag, pusher, and Load-Span), parking brake system, and drum speed.
- 10182711This bulletin provides instruction and information on required vehicle hydraulic system updates that address performance deficiencies in the vehicle?s hydraulic system.
- 10181121This bulletin provides instruction on how to correctly prime the hydraulic steering pump. Use this procedure anytime the hydraulic steering pump is replaced.
- 10181119There may be air trapped in the steering system if the steering wheel is turned from full left to full right and the steering doesn?t feel consistently smooth through the process. This bulletin provides instruction on how to bleed air from the steering system.
- 10179540Fleet Manager System Access instructions for configurable settings.
- 10179539Oshkosh engineering has identified a chute speed inconsistency on some 2020 model year S-Series front discharge mixers. Affected trucks will have chute speeds that are faster in one direction and slower in the other direction. Chute left/right timing should be 15 seconds 1 second and up/down should be 9.5 seconds 1 second.
Every Oshkosh S-Series model year
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.