# 21735437 Gear | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Servo-Pump Drive Gear - Part Number: 21735437

  

A genuine Volvo Penta servo-pump drive gear used in Volvo Penta TAD8 timing-gear and auxiliary-drive systems. It is manufactured to the factory dimensions and operating specification for the catalogued installation.

  

⚙️ Key Features

  

• Precision-machined torque-transfer surfaces

• Factory gear, spline or flange geometry

• Designed for continuous propulsion or industrial load

• Requires correct bearing, fastener and shim setup

• Matched to the specific drive or engine configuration

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21735437 (current OEM reference)

  

OEM / Related Numbers:

  

• 21623729 - servo-pump drive flange

• 21569385 - flange nut

• 948888 - O-ring

• 996056 - flange screw

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta TAD8 timing-gear and auxiliary-drive systems

  

Typically suits:

  

• Engine / drive models:

• TAD840VE

• TAD841VE

• TAD842VE

• TAD843VE

• TAD850VE

• TAD851VE

• TAD852VE

• TAD853VE

• TAD870VE

• TAD871VE

• TAD872VE

• TAD873VE

• TAD880GE

• TAD880VE

  

• HP Range: Approximately 250HP - 400HP, depending on rating

• Engine Type: 7.7L inline six-cylinder turbocharged industrial diesel

• Year Range: Approximately 2010 - 2021

• Fitment Note: Used in the servo-pump drive arrangement when the engine is not equipped with the alternative air-compressor drive.

  

🔌 Function

  

A precision drivetrain component that transfers rotational torque while maintaining the specified alignment, ratio and bearing relationship.

  

Common signs of failure:

  

• Abnormal whine, rumble or knocking

• Excessive backlash or shaft movement

• Pitting, scoring or fretting

• Metal debris in lubricant

• Vibration or premature bearing and seal wear

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 667.54 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 667.54 AUD | In stock |

## Images

- 21735437 Gear | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21735437-gear-genuine-volvo-penta)
> Updated: 2026-08-03