20405797 Support Ring | Genuine Volvo Penta Part
20405797 Support Ring | Genuine Volvo Penta Part
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Available from Volvo Penta international
Typically reaches our store in 10–14 business days
Availability checked daily with Volvo Penta
✓ Authorised Volvo Penta Dealer · Genuine Volvo Penta parts · Ships Australia-wide
🔧 Product Description
Genuine Volvo Penta support ring used in an alternator mounting and pulley-retention assembly. This component is also known as a back-up ring or plain support washer.
🚤 Compatibility
Typically suits:
- Volvo Penta TAD720VE
- Volvo Penta TAD721VE
- Volvo Penta TAD722VE
- Volvo Penta TAD520VE
- Engine Family: TAD
⚙️ Key Features
- Alternator support or backing ring
- Function group 3219 - alternator mounting hardware
- Supports the pulley, spacer or mounting interface
- Distributes load and maintains the specified spacing
- Must be installed in the original orientation and position
- Engine type: Alternator-specific Volvo Penta diesel applications
🔌 Function
Provides the required support, spacing or load distribution within the alternator mounting or pulley assembly.
⚠️ Common Signs of Failure
- Pulley or bracket axial play
- Washer/ring grooving or deformation
- Alternator misalignment
- Loose or incorrectly spaced mounting
🛠️ Service Notes
- Confirmed only in the alternator mounting and pulley-retention assembly for TAD720VE, TAD721VE, TAD722VE and TAD520VE — function group 3219
- Fit in the original orientation and position; it exists to set spacing or carry load at the pulley interface, so a ring fitted the wrong way round or omitted changes that spacing
🔄 Supersession & Cross Reference
OEM / Related Numbers
- 21801402 - related alternator in one documented arrangement
- 20460360 - related alternator bracket
- 20593398 - related tensioner
- 20593394 - related pulley
📦 Condition
- Genuine Volvo Penta part
- Brand new
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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