You are here: Home » Products » Hydraulic Pump » Hydraulic Gear Pump » G101 G102 Parker Hydraulic Gear Pumps

loading

G101 G102 Parker Hydraulic Gear Pumps

Parker G101/G102 series are heavy-duty cast iron fixed displacement gear pumps, widely used for dump trucks and mobile hydraulic systems. Featuring compact structure, stable performance and long service life, they support medium pressure operation and various installation methods. G101 and G102 are reliable and cost-effective hydraulic power units for light and medium-duty commercial vehicles.
  • G101 G102

  • Green Hydraulic

  • G101 G102

  • Standard export carton/plywood case

  • Yes

  • ISO9001,CE

  • • Industrial • Energy • Government (Non Aerospace) • HVAC • Mobile • Natural Resources • Transportation (Non Aerospace)

  • 1. Industrial Hydraulic Systems 2. Mobile Equipment (Industrial Vehicles) 3. Construction and Engineering Machinery 4. Metallurgy Industry

  • Key Shaft and Spline shaft

  • 1 set

Availability:
facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
sharethis sharing button

Product Description

C101/C102 SERIES Gear Pump  Overview

The Parker G101/G102 series are heavy-duty, fixed-displacement cast iron gear pumps purpose-built for vocational and municipal mobile hydraulic systems, particularly dump trucks and trailers. Designed for durability and reliability in rugged environments, these pumps feature integrated control valves and robust construction to deliver consistent performance for lifting and lowering dump beds, making them a staple in on/off-highway equipment where uptime is critical.

Features and Benefits

  • Rugged Cast Iron Construction:
    The G101/G102 series is built with high-tensile cast iron bodies and covers, providing superior structural rigidity and long-term durability. This heavy-duty construction minimizes deflection and mechanical fatigue under repeated high-pressure cycles, ensuring stable performance and extended service life in demanding work environments.
  • Integrated Control & Relief Valve System:
    Unlike basic pumps that require external components, the G101/G102 features an integrated raise/neutral/lower control valve with a factory-set relief valve. This all-in-one design protects the pump and hydraulic cylinder from overpressure while simplifying installation and reducing maintenance needs.
  • Heavy-Duty Gear & Bearing Design:
    Utilizing hardened alloy steel gears and heavy-duty roller bearings, the G101/G102 is built to withstand high loads, fluid contamination, and thermal shock. Precision-machined components minimize internal leakage and friction, maintaining high volumetric efficiency even during continuous, high-cycle use.
  • Proven Medium-Pressure Capability:
    Engineered for reliable operation in typical dump truck applications, the G101/G102 handles continuous pressures up to 2,500 psi (172 bar) with peak pressures up to 3,000 psi (207 bar). This capability delivers consistent, smooth power to single-acting cylinders under heavy loads.
  • Modular Versatility & Installation Flexibility:
    The series offers flexible mounting configurations to suit diverse chassis layouts: the G101 features a dual-shaft design for remote PTO mounting, while the G102 uses a single-shaft design for direct driveline installation. Both support standard SAE "B" mounting and a range of displacements, making them adaptable to a wide variety of vocational truck applications.

Model Codes

G101G102(1)

Technical Data

Model Size Displacement (cm/rev) Max. Continuous Pressure Max. Peak Pressure Max. Speed (rpm) Min. Speed (rpm)
63 63 172 bar (2500 psi) 207 bar (3000 psi) 2400 500
80 80 172 bar (2500 psi) 207 bar (3000 psi) 2400 500
92 92 172 bar (2500 psi) 207 bar (3000 psi) 2400 500
104 104 172 bar (2500 psi) 207 bar (3000 psi) 2400 500
140 140 172 bar (2500 psi) 207 bar (3000 psi) 2400 500
180 180 172 bar (2500 psi) 207 bar (3000 psi) 2200 500

G101/G102 Hydraulic Gear Pump Installation Dimensions

G101G102(2)

Applications

The Parker G101/G102 series provides a rugged, cost-effective power solution specifically tailored for vocational truck-mounted hydraulic systems, where reliable lifting performance and uptime are critical:
  • Dump & Tipper Trucks: The primary application for the G101/G102 series, delivering consistent, high-flow power to raise and lower dump beds on both light-duty and heavy-duty tipper trucks. The integrated relief valve protects the cylinder from overpressure during tipping operations.

  • Refuse & Waste Collection Vehicles: Widely used in front-load and rear-load garbage trucks, powering bin lifts, compactors, and tailgate mechanisms. The robust construction handles frequent, high-cycle operations common in refuse routes.

  • Utility & Service Trucks: Ideal for service bodies, utility trucks, and work trucks equipped with cranes, winches, or tool lifts. The dual-shaft G101 and direct-mount G102 offer flexible installation to fit various chassis layouts.

  • Agricultural & Farm Equipment: Commonly used in farm trucks and trailers for grain tippers, livestock feeders, and small-scale material handling systems, where the pump’s tolerance to fluid contamination ensures reliable performance in harsh, outdoor environments.

  • Municipal & Road Maintenance Vehicles: Suited for salt spreaders, de-icing equipment, and small plow systems, delivering power for material distribution and accessory functions in cold, corrosive winter conditions.


Vane Pump Application



Packaging & Delivery

G101/G102 pumps are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.


G101/G102 Gear Pump  FAQ

1. What are G101/G102 series gear pumps

The G101 and G102 are heavy-duty, fixed-displacement cast iron gear pumps, purpose-built for vocational truck-mounted hydraulic systems, especially dump trucks and tipper trailers. Designed for reliability and simplicity, these pumps feature integrated relief and directional control valves, making them a turn-key solution for powering single-acting dump bed cylinders.

2. What makes the G101/G102 different from standard gear pumps

The G101/G102 series is specifically optimized for the demands of dump truck applications, offering several key differences:
  • Integrated Valve Design: Unlike basic pumps that require external valves, the G101/G102 come factory-equipped with a relief valve and a raise/neutral/lower control valve, simplifying installation and reducing parts count.

  • Built for Dump Cycle Durability: With heavy-duty cast iron construction and hardened gears, they are engineered to handle the high-cycle, shock-loaded operation common in repeated tipping cycles.

  • Application-Specific Mounting: The G101 features a dual-shaft design for remote PTO mounting, while the G102 uses a single-shaft design for direct driveline mounting, offering flexible installation for different truck chassis configurations.

3. What is the working pressure range of G101/G102 pumps

The G101/G102 series is rated for reliable performance in medium-pressure applications:

  • Continuous Pressure: Up to 2,500 PSI (172 bar).

  • Intermittent/Peak Pressure: Up to 3,000 PSI (207 bar).

    This pressure range is perfectly suited for the lifting requirements of most on-highway and light-to-medium duty off-highway dump trucks.

4. Can G101/G102 pumps replace other brands

Yes, the G101/G102 series is a common direct replacement for many OEM and aftermarket dump pumps. It is often used as a replacement or upgrade for:

  • Muncie: PH-Series dump pumps.

  • Permco: PTO-driven dump pumps.

  • Commercial Intertech / Parker: Similar cast iron truck pumps.

To ensure a successful swap, verify the required Displacement (cm³/rev or gpm), Mounting Flange (SAE “B”), Shaft Type, and control valve configuration (air, cable, or electric).

5. What hydraulic oil is suitable for G101/G102 gear pumps

To protect the gears, bearings, and integrated valves, the following is recommended:

  • Oil Type: Premium anti-wear (AW) hydraulic fluids designed for mobile equipment.

  • Viscosity: Standard ISO VG32 to VG68. The optimal operating range is 100 to 150 SUS (20 to 30 cSt).

  • Filtration: A 10-micron return line filter is recommended to keep the fluid clean and prevent premature wear of the pump components.

6. What is the typical speed range of G101/G102 pumps

The G101/G102 pumps are optimized for standard PTO speeds:

  • Maximum Speed: 2,400 RPM (continuous).

  • Minimum Speed: 500 RPM (for proper lubrication).

The pump’s flow rate is directly proportional to its speed, making it important to match the pump’s displacement to the engine’s PTO speed to achieve the required cylinder cycle time.

7. Do you provide OEM or customized services

Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.

8. How can I get a quotation quickly

Please provide the following details:

  • Model or displacement

  • Working pressure

  • Speed

  • Quantity
    We will reply within 12 hours with a competitive quotation.


Certifications & Quality Assurance

G101/G102 pumps are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.



Green Hydraulic Patent Certificate

FAQ

1.How does the variable displacement work?

The pump's flow is adjusted by changing the angle of an internal swash plate. As the swash plate angle changes, the stroke length of the pistons varies, which in turn changes the volume of fluid displaced per rotation, allowing the flow rate to adapt to the system's needs.


2.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.


3.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.


4.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.


5.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).


Unedited footage of the Green Hydraulic Factory

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

Unedited footage of the Green Hydraulic Factory

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.

Unedited footage of the Green Hydraulic Factory

Green Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.

Unedited footage of the Green Hydraulic Factory3

All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.

Unedited footage of the Green Hydraulic Factory4

To meet the diverse needs of different industries, the green hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Unedited footage of the Green Hydraulic Factory5

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.


Green Hydraulic Advantages
Green logo



Previous: 
Next: 

GREEN HYDRAULIC CAN GIVE YOU THE SERVICE AND ATTENTION THAT BIGGER COMPANIES CANNOT

Contact us
If There Are Any Gerreen Machining lssues,
Please Contact Us.
Hydraulic
Application
Why Green
COPYRIGHT © 2025 CHANGZHOU GREEN HYDRAULIC CO., LTD. ALL RIGHTS RESERVED.