Genuine Volvo Haldex 4 AOC (Active On-Demand Coupling) Oil Pump
Genuine Volvo 31256757 - 235089
Product Description
If your AWD P3 Volvo has unexpectedly left you stranded in slippery conditions, it's possible your car's AWD needs service.
AWD Volvos from 2003 and up (like the S60R/V70R, XC70, XC90, and AWD versions of the S60/V70 and S40/V50) use a system called Haldex to engage the rear wheels when the front wheels start to slip.
A cutaway diagram of the Active On-Demand Coupling
This Haldex system relies on a multi-plate clutch in the rear of the car, also called the Active On-Demand Coupling (AOC). When the system detects front wheel spin, valves open and allow pressurized oil to clamp the clutch down, hooking up the rear wheels and getting you moving again.
The system relies on oil pressure as high as 80 bar (1100psi!) to cycle the hydraulic clutch, and just like any system that pumps oil around, regular filter and fluid changes are recommended. For Haldex, we suggest changing the fluid and filter every 50,000 miles
A clogged (and failed!) Haldex pump
If fluid changes are neglected and the filter gets clogged, the Haldex pump has to work harder and harder until it eventually burns out: you'll suddenly get lots of front wheel spin, and when scanned the car will have pump error codes from the DEM, such as DEM-0006.
This Genuine Volvo pump kit includes a new pump and new allen bolts, and is perfect for getting all four of your P3's wheels spinning again.
About Genuine Volvo
Everything IPD supplies under the "Genuine Volvo" designation are the factory original Volvo parts. These are the same quality parts that you will get in the blue Volvo branded box from a dealership. All Volvo supplied Genuine Volvo parts are made to specifications by Volvo and under their strict quality control guidelines.
Volvo relies on high-quality OEM manufactures such as Lemforder, Behr, Sachs, Bosch, Valeo, Siemens, VDO, Corteco, and many more to maintain its dedication to quality and safety.
IPD is the exclusive North American distributor for Genuine Classic Volvo parts outside of the Volvo Dealership network. We are proud of our Volvo heritage dating back to 1963, a reputation that is unmatched by others in the industry.
Many may not know this but Volvo in Latin roughly translates to "to roll". The company was founded back in 1927 by Assar Gabrielsson and Gustaf Larsson as a spin-off from ball-bearing manufacturer SKF. While the Volvo logo looks like the biology symbol for male, it's really the Swedish symbol for Iron. With a nod to its heritage in alloys, Volvo chose a logo that depicted a ring bisecting at one o’clock. Today Volvo is known around the world as one of the most iconic brands known for safety, longevity, and its enthusiast following.
