Hawk 24 HP Gearbox — XLTI/PXI/XXT Series

The Hawk 24 HP reduction gearbox converts petrol engine speed to the optimal pump crankshaft speed for the XLTI, PXI, and XXT series triplex plunger pumps. Available in two engine-shaft variants, it bolts directly between a horizontal-shaft engine and the pump using a standard SAE J609B flange, providing a reliable 2.176:1 speed reduction from 3,150 RPM down to 1,450 RPM. Rated to 17.7 kW (24 HP), it suits a wide range of mobile and skid-mounted high-pressure washing, hydro-jetting, and industrial cleaning applications.

Specifications

Maximum Power	17.7 kW (24 HP)
Input Speed (Engine)	3,150 RPM
Output Speed (Pump)	1,450 RPM
Reduction Ratio	2.176 : 1
Pump Shaft Diameter	24 mm
Engine Flange	SAE J609B
Oil Type & Capacity	SAE 90 gear oil — 0.33 L (11 oz)
Weight	4 kg
Spare Parts Kit	1.905-008.0

Variants — Engine Shaft Size

Part Code	Engine Shaft	Typical Engine Class
1.904-905.0	1″ (25.4 mm)	Honda GX630 / GX690, Vanguard 23 HP
1.904-904.0	1-1/8″ (28.6 mm)	Vanguard 27–37 HP, Kohler CH730–CH750

Applications

• Mobile and trailer-mounted high-pressure water blasters
• Skid-mounted hydro-jetting and drain-cleaning units
• Industrial surface preparation and cleaning systems
• Agricultural and horticultural spray equipment
• Fire-fighting pump sets and emergency washdown systems

Key Features

• Genuine Hawk gearbox — precision-machined helical gears for quiet, efficient power transfer
• 2.176:1 ratio converts common petrol-engine speeds directly to the rated pump RPM
• SAE J609B bell-housing flange for straightforward engine-to-pump alignment
• Compact 4 kg aluminium housing — easy to fit in tight skid and trailer frames
• Two engine-shaft options (1″ and 1-1/8″) cover the most popular Honda, Briggs & Stratton Vanguard, and Kohler engines
• Compatible with Hawk NLTI, XLTI, PXI (350 & 500 bar), PXI Heavy Duty, and XXT pump series
• Factory-recommended SAE 90 gear oil with a low 0.33 L fill for fast servicing

Technical Documents

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

Parts & Service

AES Waterblasters stocks genuine Hawk gearbox assemblies, spare-parts kits, seals, and bearings for prompt dispatch across New Zealand. Whether you need a complete replacement gearbox or the 1.905-008.0 service kit, our team can help — call 09 271 4782 or email sales@aesblasters.co.nz.

Related Models

• Hawk 13 kW NMT Gearbox — smaller frame for NMT-series pumps up to 13 kW
• Hawk 31 HP PXI Gearbox — heavy-duty option for higher-powered PXI builds
• Hawk 5.5 kW Gearbox — compact gearbox for lighter-duty pump configurations