{"product_id":"22275076-pump-piston-genuine-volvo-penta","title":"22275076 Pump Piston | Genuine Volvo Penta Part","description":"\u003ch2\u003e\n 🔧 Product Description\n\u003c\/h2\u003e\n\u003cp\u003e\n The strength required to steer a boat with a hydraulic steering system is inversely proportional to the number of turns of the wheel lock-to-lock. Wheel turns are determined by the ratio between the cylinder volume, the pump displacement and the free movement of the steering device. A large cylinder volume with a small pump displacement gives more wheel turns; a small cylinder volume with a large pump displacement gives fewer. Fewer wheel turns means quicker steering response but more effort; more wheel turns means slower response but less effort. The helm pumps are available in three displacement sizes - 28 cc, 33 cc and 39 cc - each in three mountings: front mount, rear mount and tilt mount. This is the 28 cc tilt mount pump, with 5 pistons, a 70 bar relief valve setting and a maximum wheel diameter of 508 mm.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚙️ Key Features\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  28 cc displacement per wheel revolution\n \u003c\/li\u003e\n \u003cli\u003e\n  Tilt mount\n \u003c\/li\u003e\n \u003cli\u003e\n  Five piston pump\n \u003c\/li\u003e\n \u003cli\u003e\n  70 bar relief valve setting\n \u003c\/li\u003e\n \u003cli\u003e\n  For steering wheels up to 508 mm in diameter\n \u003c\/li\u003e\n \u003cli\u003e\n  Requires tilt mechanism 22299003, ordered separately\n \u003c\/li\u003e\n \u003cli\u003e\n  5.392 kg\n \u003c\/li\u003e\n \u003cli\u003e\n  Replaces 21639576\n \u003c\/li\u003e\n \u003cli\u003e\n  Tilt mount helm pump\n \u003c\/li\u003e\n \u003cli\u003e\n  5 pistons\n \u003c\/li\u003e\n \u003cli\u003e\n  Maximum wheel diameter 508 mm\n \u003c\/li\u003e\n \u003cli\u003e\n  5 kg\n \u003c\/li\u003e\n \u003cli\u003e\n  Displacement per rev: 28 cc\n \u003c\/li\u003e\n \u003cli\u003e\n  Max wheel diameter: 508 mm\n \u003c\/li\u003e\n \u003cli\u003e\n  Pistons: 5\n \u003c\/li\u003e\n \u003cli\u003e\n  Mounting: Tilt mount helm pump\n \u003c\/li\u003e\n \u003cli\u003e\n  Relief valve setting: 70 bar\n \u003c\/li\u003e\n \u003cli\u003e\n  Weight: 5 kg\n \u003c\/li\u003e\n \u003cli\u003e\n  Fits: Volvo Penta hydraulic steering systems\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔌 Function\n\u003c\/h2\u003e\n\u003cp\u003e\n Converts steering wheel rotation into pressurised hydraulic oil flow to the steering cylinder, on a helm whose angle can be adjusted.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚠️ Common Signs of Failure\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Heavy, notchy or inconsistent steering\n \u003c\/li\u003e\n \u003cli\u003e\n  Wheel turning without the drive following, from internal bypass\n \u003c\/li\u003e\n \u003cli\u003e\n  Hydraulic oil weeping at the shaft seal or the port fittings\n \u003c\/li\u003e\n \u003cli\u003e\n  Helm will not hold its set tilt angle\n \u003c\/li\u003e\n \u003cli\u003e\n  Air drawn into the circuit giving a spongy helm\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🛠️ Service Notes\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Budget for tilt mechanism 22299003 as well - a tilt mount pump cannot be installed without it\n \u003c\/li\u003e\n \u003cli\u003e\n  Check the wheel diameter: tilt mount pumps are rated to 508 mm, so a wheel sized for a fixed helm may be too large\n \u003c\/li\u003e\n \u003cli\u003e\n  The same 28 cc pump is 22275070 in front mount and 22275073 in rear mount\n \u003c\/li\u003e\n \u003cli\u003e\n  Tilt mechanism 22299003 is required and must be ordered separately\n \u003c\/li\u003e\n \u003cli\u003e\n  Displacement and mounting together are the product: the same 28 cc displacement is also listed as 22275070 and 22275073, and the other tilt mount pumps are 22275077 and 22275078\n \u003c\/li\u003e\n \u003cli\u003e\n  Cylinder volume and pump displacement together set how many turns the wheel takes lock to lock\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/h2\u003e\n\u003ch3\u003e\n OEM Supersession Chain\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  22275076 → Supersedes 21639576 → Supersedes 21135049 → Supersedes 3809978\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n OEM \/ Related Numbers\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  21639576 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  21135049 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  3809978 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  22299003 (required tilt mechanism)\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 📦 Condition\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Genuine Volvo Penta part\n \u003c\/li\u003e\n \u003cli\u003e\n  Brand new\n \u003c\/li\u003e\n \u003cli\u003e\n  Supplied in original or equivalent packaging\n \u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Volvo Penta","offers":[{"title":"Default Title","offer_id":53379789193508,"sku":"9500027","price":1429.18,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_fe854343-a3b3-4440-a3f4-0421b153c53a.jpg?v=1788057625","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/22275076-pump-piston-genuine-volvo-penta","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}