# 3979028 Air Cylinder | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta pneumatic cylinder from the Engine Controls group, weighing 0.377 kg and listed for 1 application on the DH series. It supersedes part number 1556437.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta DH10A

-   **Engine Family:** DH

## ⚙️ Key Features

-   0.377 kg
-   Supersedes 1556437
-   1 application on the DH series
-   Engine Controls group

## 🔌 Function

Converts air pressure into a straight push or pull to move an engine control linkage.

## ⚠️ Common Signs of Failure

-   Control moves slowly, part way or not at all
-   Audible air leak at the cylinder when pressurised
-   Rod bent, scored or sticking in its bore
-   Air escaping past the piston seals so the cylinder will not hold position
-   Mounting eye or clevis worn giving lost motion in the linkage

## 🛠️ Service Notes

-   Because this cylinder actuates an engine control, prove full travel and correct rest position on the bench and again on the engine before relying on it
-   Check the air supply, pressure and pipework for restriction before condemning the cylinder

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3979028 → Supersedes 1556437

### OEM / Related Numbers

-   1556437 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 595.38 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Controls
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 595.38 AUD | In stock |

## Images

- 3979028 Air Cylinder | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3979028-air-cylinder-genuine-volvo-penta)
> Updated: 2026-09-06