20405928 Flywheel | Genuine Volvo Penta Part
20405928 Flywheel | 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 SAE 2 flywheel with a rotational inertia of 2.6 kgm² for D5 and D7 generator engines. It carries starter ring gear 21033328 and is retained by ten hexagon screws 20405654.
🚤 Compatibility
Typically suits:
- Volvo Penta TD720GE
- Volvo Penta TD520GE
- Volvo Penta TAD720GE
- Volvo Penta TAD721GE
- Volvo Penta TAD722GE
- Volvo Penta TAD730GE MECH
- Volvo Penta TAD730GE EDC4
- Volvo Penta TAD731GE MECH
- Volvo Penta TAD731GE EDC4
- Volvo Penta TAD732GE EDC4
- Volvo Penta TAD733GE EDC4
- Volvo Penta TAD520GE
- Volvo Penta TAD530GE MECH
- Volvo Penta TAD530GE EDC4
- Volvo Penta TAD531GE MECH
- Volvo Penta TAD531GE EDC4
- Volvo Penta TAD532GE EDC4
- Engine Family: TD, TAD
⚙️ Key Features
- SAE 2 flywheel configuration
- Rotational inertia 2.6 kgm²
- Used across the TD520-TAD733 generator-engine family
- Works with starter ring gear 21033328
- Ten flywheel screws 20405654 provide the specified crankshaft clamp load
- Engine type: Volvo Penta four- and six-cylinder industrial generator diesel
🔌 Function
Stores rotational energy, transfers crankshaft torque to the driven equipment and provides the starter ring-gear mounting.
⚠️ Common Signs of Failure
- Cracked or heat-checked flywheel surface
- Damaged starter ring-gear teeth
- Flywheel run-out or vibration
- Loose or stretched retaining screws
- Abnormal driveline torsional vibration
🛠️ Service Notes
- Inspect the ring gear teeth for chipping, burring and one-sided wear before refitting — a damaged tooth ring will chew up a new starter pinion
- Check the clutch or damper mating face for scoring, heat cracking and blueing, and check the crankshaft rear seal and any spigot bearing while access is good
- Clean the crankshaft flange and the flywheel face so both are dry and free of oil, old sealant and burrs; a trace of oil on that joint is enough to let the flywheel work loose
- Locate the flywheel the correct way round on its dowel or locating feature, and renew the bolts wherever the manual calls them single-use
- Tighten the bolts progressively in a criss-cross pattern to the figure and stages given in the workshop manual for your engine, and never lever against the ring gear teeth to hold it
🔄 Supersession & Cross Reference
OEM / Related Numbers
- 21033328 - starter gear ring
- 20405654 - flywheel retaining screws
- 20405643 - expansion plug
- 20405649 - related SAE 3 flywheel with 1.2 kgm² inertia
📦 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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