# 20860507 V-Ribbed Belt | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo Penta heavy-duty multi-rib accessory belt with ten longitudinal ribs and an effective length in the approximately 1783-1785 mm class. It is designed to transmit crankshaft power across the matched pulley layout while flexing continuously around the tensioner and accessory pulleys.

## ⚙️ Key Features

-   Genuine Volvo Penta 10PK1783/1785 Heavy-Duty V-Ribbed Belt - part number 20860507
-   10-rib Poly-V profile for high accessory-drive load capacity
-   Approximate 1783-1785 mm effective-length class; verify the original marking
-   Maintains full rib engagement across wide heavy-duty pulleys
-   Flexible construction tolerates repeated bending and engine-bay temperature cycling
-   Exact belt path, pulley diameter and automatic tensioner must match
-   Inspect idlers, tensioner alignment and pulley grooves before fitting a new belt
-   Engine type: D5/D7-series Volvo Penta industrial diesel applications

## 🔌 Function

The belt transfers crankshaft torque to the installed accessories, which may include the alternator, coolant pump, fan or compressor depending on the engine configuration. Its multiple ribs distribute load and maintain traction with lower bending stress than a single conventional V-belt.

## ⚠️ Common Signs of Failure

-   Rib cracking, chunking or longitudinal splitting
-   Glazed rib faces accompanied by squeal or slip
-   Belt dust concentrated at one pulley
-   Frayed edge from pulley or tensioner misalignment
-   Charging, cooling or accessory performance falls under load

## 🛠️ Service Notes

-   Fit the belt over the pulleys by hand and let the tensioner take it up — never lever a ribbed belt on with a screwdriver, which cracks the rib flanks and shortens its life
-   Check that every rib sits in its pulley groove and that the belt runs central on each pulley before cranking the engine
-   Inspect the tensioner and every pulley face while the belt is off; a rough bearing, a rusty tensioner arm or a scored pulley will destroy a new belt
-   Note the routing before removal, then turn the engine over by hand once the new belt is on and re-check the run and tension following the procedure for your engine
-   Keep oil, fuel and coolant off the belt, and renew a contaminated belt rather than trying to clean it

## 🔄 Supersession & Cross Reference

### Other-Brand OEM Numbers

-   Iveco: 5801567689
-   Gates: 10PK1785HD
-   Gates: 10PK1783ES
-   Dayco: 10PK1781HD

### Aftermarket / Verified Equivalents

-   DT Spare Parts: 2.15554
-   DT Spare Parts: 4.80726
-   Febi Bilstein: 47199
-   Hutchinson: 1785K10
-   Hutchinson: 1783 K 10TK
-   Optibelt: 10PK1783
-   Optibelt: 10PK1787
-   Auger: 80090
-   Meyle: 050 010 1768
-   PE Automotive: 080.762-00A
-   Sampa: 034.030
-   Trucktec Automotive: 03.19.109

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 129.67 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 129.67 AUD | In stock |

## Images

- 20860507 V-Ribbed Belt | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20860507-v-ribbed-belt-genuine-volvo-penta)
> Updated: 2026-08-22