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The C101, C102, G101, and G102 series are fixed-displacement external gear pumps designed primarily for dump trucks, dump trailers, and mobile hydraulic systems. These pumps combine a heavy-duty cast iron construction with an integrated hydraulic control valve, providing hydraulic power for single-acting cylinders used in lifting and tipping applications.
The series offers different shaft configurations, gear widths, displacement options, and control methods to accommodate different vehicle PTO systems and hydraulic circuit requirements. They are commonly used in dump body hoists, truck-mounted hydraulic systems, and heavy-duty transport equipment.
C101 C102 G101 G102 Pump Design and Technical Features
The C101/C102/G101/G102 series features a three-piece cast iron housing, pressure-balanced thrust plates, heavy-duty bearings, and an integrated relief valve with load-check functionality. Its robust construction is designed to withstand the impact and working conditions commonly encountered in dump truck and trailer applications.
One important difference between these models is the shaft configuration. C101 and G101 pumps feature a double-shaft design, making them suitable for remote PTO mounting and different drive arrangements. C102 and G102 pumps use a single-shaft configuration for direct mounting to compatible vehicle drive systems.
The pumps are available with manual cab control or optional air-shift operation. They support two-line and three-line hydraulic circuit configurations for controlling single-acting cylinders. Factory-set relief valve options are also available, depending on the model and configuration.
The following technical data is based on the published GRH C101/C102/G101/G102 product catalogue.
| Parameter | Specification |
|---|---|
| Pump type | Fixed-displacement external gear pump |
| Construction | Three-piece cast iron housing |
| Displacement range | 25–105 cc/rev |
| Rated pressure | 175 bar |
| Peak pressure | 210 bar |
| Maximum speed | 2,400 rpm |
| Minimum speed | 600 rpm |
| Shaft configuration | Single shaft / Double shaft |
| Control options | Manual / Air shift |
| Hydraulic circuit | Two-line / Three-line |
| Applications | Dump trucks, dump trailers, tipping systems |
Model Range and Displacement
| Model | Gear Width | Displacement | Shaft Configuration |
|---|---|---|---|
| C101-20-MS/AS-R | 2 in | 85 cc/rev | Double shaft |
| C101-25-MS/AS-R | 2.5 in | 105 cc/rev | Double shaft |
| C102-20-MS/AS-L | 2 in | 85 cc/rev | Single shaft |
| C102-25-MS/AS-L | 2.5 in | 105 cc/rev | Single shaft |
| G101-07-MS/AS-R | 0.75 in | 25 cc/rev | Double shaft |
| G101-20-MS/AS-R | 2 in | 65 cc/rev | Double shaft |
| G102-15-MS/AS-L | 1.5 in | 50 cc/rev | Single shaft |
| G102-20-MS/AS-L | 2 in | 65 cc/rev | Single shaft |
Proper installation is important for reliable operation and long service life. Before installation, confirm the pump mounting, shaft connection, PTO rotation, hydraulic port configuration, and relief valve setting. Ensure that the suction line provides sufficient oil supply and that the hydraulic circuit is clean. Use suitable hydraulic oil and maintain proper filtration to reduce wear on the gears, bearings, and internal components. During commissioning, check for oil leakage, abnormal noise, pressure instability, and excessive temperature. Regular inspection of hydraulic connections, oil condition, and control valve operation helps maintain stable performance.
Cissoko provides hydraulic gear pump solutions for dump trucks, trailers, and mobile hydraulic applications. For customers replacing Parker Commercial C101/C102/G101/G102 pumps or looking for compatible aftermarket alternatives, correct model identification is essential.
Our team can help evaluate replacement requirements based on the existing pump model, nameplate photo, displacement, shaft configuration, rotation direction, control method, and hydraulic circuit arrangement.
Whether you need a complete dump truck gear pump, a replacement for an existing unit, or a suitable pump for a new hydraulic system, Cissoko can help identify an appropriate solution according to your application requirements.
C101 102 G101 102 GEAR PUMP.pdf
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