Hawk 13 kW Gearbox — NMT/NPM Series

The Hawk 13 kW NMT/NPM Gearbox (code 1.904-906.0) is a reduction gearbox designed for coupling petrol or diesel engines to Hawk NMT and NPM series triplex plunger pumps. Manufactured by Leuco S.p.A. in Italy under the Hawk brand, this gearbox reduces engine speed from 3,150 RPM down to 1,450 RPM at the pump shaft, providing the correct operating speed for high-pressure cleaning and industrial washing applications. AES Waterblasters is an authorised Hawk distributor in New Zealand, supplying genuine gearboxes, spare parts kits, and technical support.

Specifications

Code	1.904-906.0
Manufacturer	Hawk (Leuco S.p.A., Italy)
Type	Reduction gearbox
Max Power	13 kW (17.7 HP)
Input Speed	3,150 RPM
Output Speed	1,450 RPM
Gear Ratio	2.176:1
Engine Shaft	1″ (25.4 mm)
Pump Shaft	24 mm
Flange	SAE J609B
Oil	SAE 90 (0.33 L / 11 oz)
Weight	4 kg
Spare Parts Kit	1.905-008.0

Applications

• Engine-driven pressure washers and water blasters up to 13 kW
• Commercial and industrial high-pressure cleaning systems
• Mobile wash-down units for fleet, agriculture, and construction
• Trailer-mounted jetting and drain-cleaning rigs
• Any application requiring speed reduction from a petrol or diesel engine to a Hawk NMT or NPM pump

Key Features

• Designed specifically for Hawk NMT, NPM, and nickel-plated variants
• 2.176:1 ratio converts standard engine speed to the correct pump operating speed
• SAE J609B flange for straightforward engine mounting
• 1″ (25.4 mm) engine shaft and 24 mm pump shaft suit common engine and pump configurations
• Compact and lightweight at 4 kg — ideal for mobile and trailer-mounted setups
• Robust construction with high-quality Italian engineering by Leuco S.p.A.
• Low oil volume (0.33 L SAE 90) for simple, low-cost maintenance
• Spare parts kit available (code 1.905-008.0) for in-field servicing

Technical Documents

• Hawk NMT/XLTI/PXI Gearbox – Parts Schematic (PDF)

Parts & Service

AES Waterblasters carries genuine Hawk gearbox spare parts, seals, and service kits for the 13 kW NMT/NPM gearbox. Whether you need the complete spare parts kit (1.905-008.0), individual bearings, or gears, our team can supply the right parts and advise on installation. Contact us on 09 271 4782 for pricing, stock availability, or technical assistance.

Related Models

• Hawk 24 HP Gearbox — XLTI/PXI/XXT Series
• Hawk 31 HP Gearbox — PXI/XXT Series
• Hawk B10 — 10 HP Reduction Gearbox