The worst 1991 Oshkosh S-Series problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 2
Structure: body
- What is wrong
- The stainless steel fasteners for the cab entry steps and grab handles can crack and break.
- Risk
- The steps and grab handles can separate from the truckbody under load from cab occupants entering or exiting the cab, which couldresult in an injury to users.
- Remedy
- Replace the step and grab handle stainless steel fasteners with grade 5 zinc and yellow coated fasteners. Oshkosh will send the replacement fasteners to owners with the notification letters. Owners will be requested to replace the fasteners on their vehicles, and will be reimbursed for the labor to perform the repair.
Recall number 92V171000 · Recall details
Service brakes, air: antilock
- What is wrong
- The rear tandem axle brakes do not meet the service brake application time requirements of fmvss 121.
- Risk
- Failure to meet standards of fmvss 121 increases brakingdistance and increases the possibility of an accident.
- Remedy
- The o.625 inch nylon air tubing between the chassis air manifold and the tandem service relay will be replaced with .75 inch nylon tubing, which will allow brake system to meet the service brake application time requirements of fmvss 121.
Recall number 91V194000 · Recall details
Technical service bulletins for the 1991 Oshkosh S-Series 8
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This bulletin provides instruction for installing a hydraulic system charge pump filter.
- This bulletin provides information on updating hydraulic hose clamping below the cab to match current...
- This bulletin provides instruction for replacing the water pump impeller due to corrosion
- This bulletin provides information for vehicle owners that have a Dana series 172 or 175 rear axle without...
- This bulletin provides instruction for replacing the mixer pump PTO shaft, mixer pump input yoke, and...
- This bulletin provides instructions for bolting the water tank mounting feet to the water tank if the...
- This bulletin provides instruction for checking electrical connections at various critical locations
- This bulletin provides instruction on replacing the frame ground stud nut located at the rear of the...
Compare the 1991 Oshkosh S-Series
Other model years
Questions about the 1991 Oshkosh S-Series
Is the 1991 Oshkosh S-Series reliable?
Owners have filed 0 complaints about the 1991 Oshkosh S-Series.
What is the most common problem with the 1991 Oshkosh S-Series?
There are not enough complaints to tell.
How many recalls does the 1991 Oshkosh S-Series have?
2 recalls, covering structure and service brakes, air.
VIN decoder
See the problems and recalls for an exact car
Buying a used 1991 Oshkosh S-Series?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history