25783-73000G — Forklift Brake Sub-Pump / Hydraulic Oil Pump

The 25783-73000G is a forklift brake sub-pump, also referred to as a hydraulic oil pump, designed as a direct OEM replacement for HELI and compatible forklift models in the 3-7 ton class. This sub-pump works in conjunction with the main brake master cylinder to provide supplementary hydraulic pressure for the braking system, ensuring consistent pedal feel and reliable stopping power under all load conditions. Constructed with a heavy-duty cast iron body and precision-machined internal components, this pump delivers the hydraulic fluid volume and pressure required for the larger wheel cylinders used on medium and heavy-capacity forklift drum brake systems.

The pump assembly features a matched piston-and-cylinder set with EPDM sealing elements that maintain fluid integrity through extended service intervals without bypass leakage. The mounting flange is drilled with precision bolt holes that align directly with the OEM firewall or chassis bracket, and the hydraulic line ports use standard metric threads (M10x1.0 or M12x1.0) compatible with OEM brake line fittings. The pump housing includes a bleed screw port for convenient system bleeding, and the push rod interface incorporates a protective dust boot to prevent contamination ingress. The entire assembly is designed for straightforward bolt-on replacement — remove the old unit, bench-bleed the new pump, mount it, reconnect the lines, and bleed the complete brake system.

Compatible with HELI CPCD30-CPCD70, Hangcha CPCD30-CPCD70, Lonking, and other domestic-brand forklifts using the 25783-series brake sub-pump assembly. Before installation, always verify the mounting bolt pattern, outlet thread size, and push rod length match your existing unit. Use only fresh DOT 3 or DOT 4 brake fluid from a sealed container. After bleeding, check the brake pedal height and free play according to the forklift service manual. For compatible master cylinders, wheel cylinders, brake shoes, and complete drum brake service kits, visit our Forklift Brake Parts section.

Technical Specifications

• PN: 25783-73000G
• Type: Brake Sub-Pump / Hydraulic Oil Pump
• Capacity: 3.0 – 7.0 Ton Forklift
• Body Material: Cast Iron
• Fluid: DOT 3 / DOT 4 Compatible
• Outlet: Metric Thread (M10/M12)
• Includes: Dust Boot, Bleed Screw, Mounting Gasket

Compatible Forklift Models

Each 25783-73000G brake sub-pump is pressure-tested at 2000 PSI for internal and external leakage and bench-bled before packaging. The pump ships with outlet port dust caps installed and is sealed in a VCI anti-corrosion bag within a foam-lined box. 12-month warranty against manufacturing defects. Installation tip: bench-bleed the sub-pump before mounting — clamp it in a vise, fill with brake fluid, and slowly stroke the piston until bubble-free fluid emerges. For brake system diagnostics or replacement part cross-referencing, contact our support team with your forklift model and serial number.