Hydraulic Function Gear Pump 89858GT (Lift/Steer Pump) – Optimized Product Page Content

🔹 Product Overview
The Hydraulic Function Gear Pump with part number 89858GT (often cross-referenced as 89858) is a critical component in the hydraulic system of various Genie Boom Lifts equipped with combustion engines (IC).1 This pump is typically mounted to the engine or engine PTO (Power Take-Off) and is responsible for generating the hydraulic pressure and flow necessary to operate core machine functions such as the main lift/lower, steering, and outrigger circuits. It is a primary power source for the non-drive hydraulic functions.
This gear pump is essential for the primary lifting and maneuvering functionality of the lift. The part number 89858GT is the necessary replacement for addressing issues such as slow boom function speeds, weak hydraulic performance, or complete failure of the lift/steer functions on compatible models like the S-40, S-45, and Z-60/34.2 Ensuring a reliable, high-quality pump is installed is crucial for maintaining the required lifting speed, power, and safety standards of your boom lift fleet.3
🔹 Key Features & Benefits
✅ Primary Function Power: Generates the essential flow and pressure for the main lift, lower, steer, and outrigger functions.
✅ IC Engine Focus: Specifically designed for mounting and integration with the combustion engine’s hydraulic power supply.
✅ Boom Lift Compatibility: Essential replacement for popular Genie S-Series Telescopic and Z-Series Articulating Boom Lifts.4
✅ Direct OEM Cross-Reference: High-quality aftermarket equivalent for Genie part numbers 89858GT and 89858.5
🔹 Technical Details
| Detail |
Specification |
| Part Number |
89858GT (Also known as 89858) |
| Condition |
100% new aftermarket replacement |
| Type |
Hydraulic Gear Pump (Function Circuit) |
| Compatibility Note |
Designed for Internal Combustion (IC) Engine-Powered Lifts. |
| Function |
Supplies hydraulic fluid for lifting, steering, and other auxiliary circuits. |
| Application Location |
Typically mounted to the engine or gearbox/PTO. |
| Warranty |
12 months against manufacturing defects |
🔹 Compatible Genie Models & Applications
The Hydraulic Gear Pump 89858GT is a vital replacement part for the following Genie Boom Lifts:
| Genie Equipment Series |
Specific Compatible Models |
| S-Series (Telescopic Boom) |
S-40, S-45 |
| Z-Series (Articulating Boom) |
Z-60/34 |
Common Application: Essential for powering the hydraulic cylinders that elevate and articulate the boom sections and the hydraulic circuits responsible for steering and stabilization.
🔹 Why Choose RQ Parts?
Restore Full Power: Guarantees the hydraulic power needed to run the main lift and steer functions at optimal speed and efficiency.
Engine Integration: Engineered for a precise fit and reliable performance when driven by the machine’s combustion engine.
High Durability: Constructed with high-grade materials to handle the necessary pressures and wear of boom lift operation.
Competitive Pricing: Cost-effective solution for replacing high-value, complex hydraulic pump components.