7029120048 7029120047 7029122001 Parker JCB Gear Pump 275 bar

Product Overview

The 7029120048, 7029120047, 7029122001, 7029120053, and 7029111302 series hydraulic gear pumps are Parker Hannifin’s purpose-built main hydraulic pumps for JCB 3CX / 4CX series backhoe loaders. Featuring a tandem (dual-section) gear pump configuration, these units deliver two independent hydraulic outputs from a single drive shaft input – one for the working attachment (loading/excavation) and one for the steering/auxiliary system – making them the core power components of JCB 3CX/4CX hydraulic systems.

This product range comprises the following models:

• 7029120048: 36 cm³/rev front + 29 cm³/rev rear displacement

• 7029120047: 36 cm³/rev front + 26 cm³/rev rear displacement

• 7029122001: 33 cm³/rev front + 29 cm³/rev rear displacement

• 7029120053: Parker PGP620 Series tandem gear pump

• 7029111302: Parker PGP620 Series gear pump

Key Interchangeability Advantage: Our series of gear pumps are manufactured to strict Parker original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces (SAE B 2-hole flange), drive shaft configurations, and port dimensions and positions are identical to the original product – no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions (covering rated pressure, peak pressure, and full speed range performance curves), guaranteeing plug-and-play reliability with zero performance deviation.

Technical Specifications 

7029120048 Tandem Gear Pump (36 + 29 cm³/rev)

• Product Series: Parker Tandem External Gear Pump

• Compatible Models: JCB 3CX, 4CX, 4CXM, 3CXS-PC, 3CX 15, 4CX444 SUPER series backhoe loaders

• Front Pump Displacement: 36 cm³/rev (36 L/min @ 1000 rpm)

• Rear Pump Displacement: 29 cm³/rev (29 L/min @ 1000 rpm)

• Front Pump Maximum Working Pressure: 250 bar

• Rear Pump Maximum Working Pressure: 275 bar

• Rotation: Clockwise (viewed from shaft end)

• Drive Shaft: 1″ Diameter 15-tooth SAE splined shaft, 16/32 pitch

• Mounting Flange: SAE B 2-hole

• Inlet Port: Single 2″ SAE flange inlet

• Front Pump Outlet: 1 1/16″-12 UNF threaded

• Rear Pump Outlet: 7/8″-14 UNF threaded

• Maximum Input Shaft Torque: 460 Nm

• Housing Material: High-strength cast iron

• Weight: 26 kg

7029120047 Tandem Gear Pump (36 + 26 cm³/rev)

• Product Series: Parker Tandem External Gear Pump

• Compatible Models: JCB 3CX, 4CX, 214, 215, 3CXS, 3CX-T series backhoe loaders

• Front Pump Displacement: 36 cm³/rev (36 L/min @ 1000 rpm)

• Rear Pump Displacement: 26 cm³/rev (26 L/min @ 1000 rpm)

• Front Pump Maximum Working Pressure: 250 bar

• Rear Pump Maximum Working Pressure: 275 bar

• Rotation: Clockwise (viewed from shaft end)

• Drive Shaft: 1″ Diameter 15-tooth SAE splined shaft, 16/32 pitch

• Mounting Flange: SAE B 2-hole

• Inlet Port: Single 2″ SAE flange inlet

• Front Pump Outlet: 1 1/16″-12 UNF threaded

• Rear Pump Outlet: 7/8″-14 UNF threaded

• Maximum Input Shaft Torque: 460 Nm

• Housing Material: High-strength cast iron

• Weight: 26 kg

7029122001 Tandem Gear Pump (33 + 29 cm³/rev)

• Product Series: Parker Tandem External Gear Pump

• Compatible Models: JCB 3CX, 4CX, 214, 215, 216, 217 series backhoe loaders

• Front Pump Displacement: 33 cm³/rev (33 L/min @ 1000 rpm)

• Rear Pump Displacement: 29 cm³/rev (29 L/min @ 1000 rpm)

• Front Pump Maximum Working Pressure: 275 bar

• Rear Pump Maximum Working Pressure: 275 bar

• Rotation: Counter-Clockwise (viewed from shaft end)

• Drive Shaft: 1″ Diameter parallel keyed shaft

• Mounting Flange: SAE B 2-hole

• Inlet Port: Combined 2″ SAE flange inlet

• Front Pump Outlet: 1 1/16″-12 UNF threaded

• Rear Pump Outlet: 7/8″-14 UNF threaded

• Maximum Input Shaft Torque: 325 Nm

• Housing Material: High-strength cast iron

• Weight: 26 kg

7029120053 / 7029111302 Series

• Product Series: Parker PGP620 Series Tandem Gear Pump

• Parker Base Model: PGP620B0330CE1H3WS7*D5C-620A0230XB1D4B1B1 (7029120053)

• Housing Material: High-strength cast iron

• Weight: Approx. 25 kg

Key Technical Advantages

1. Tandem Integrated Design for Independent Dual-Circuit Output

Two independent gear sections are integrated in series within a single cast iron housing, driven by a single input shaft to simultaneously power the front and rear pumps, independently supplying oil to the working attachment (loading/excavation) and steering/auxiliary systems. This design dramatically simplifies hydraulic piping layout on JCB 3CX/4CX machines, reducing external connection points and leakage risks.

2. High-Strength Cast Iron Housing for Demanding Conditions

Manufactured with high-strength cast iron housing, offering excellent impact resistance and structural rigidity to withstand high-frequency vibration and heavy shock loads encountered by JCB 3CX/4CX machines in construction sites, quarries, and other harsh environments. Precision construction and durable materials guarantee the maintenance of factory pressure and flow parameters.

3. SAE Standard Interface for Direct OEM Replacement

Manufactured to strict Parker original design standards with mounting flange, drive shaft, and port dimensions and positions identical to original units. The SAE B standard flange and 1″ diameter drive shaft (15-tooth SAE splined or parallel keyed) precisely match JCB factory drive interfaces – direct installation with no modifications required.

4. High Pressure Capacity for Heavy-Duty Operations

7029120048 and 7029120047 deliver rear pump maximum working pressure of 275 bar with maximum input shaft torque of 460 Nm; 7029122001 delivers 275 bar on both front and rear pumps. Fully meeting the power demands of JCB 3CX/4CX excavating, loading, steering, and other hydraulic functions.

5. Broad Compatibility Coverage

This pump series is compatible with dozens of JCB 3CX, 4CX, 214, 215, 216, and 217 backhoe loader model variants. Each model features part number interchangeability:

• 7029120048 replaces JCB part numbers: 20/925580, 332/F9030, 7029120025

• 7029120047 replaces JCB part numbers: 332/F9029, 20/925579, 20/925339, 20/925338, 332/F9028, 7029120023

• 7029122001 replaces JCB part numbers: 400-E0868, 400/E0868, 332/G6350, 20/912800, 20/903100, 20/902900

Application Areas

• JCB 3CX Backhoe Loader: The world’s best-selling backhoe loader, used in construction sites, municipal engineering, agricultural water conservancy, and other excavation and loading applications

• JCB 4CX Backhoe Loader: High-specification backhoe loader for heavier-duty operations

• JCB 214 / 215 / 216 / 217 Series: JCB mid-size backhoe loaders and industrial tractor series

• JCB 3CXS / 3CX-T Series: JCB sideshift and precision control (servo) backhoe loader variants

• Construction & Municipal Engineering: Road construction, pipeline installation, foundation excavation

• Agriculture & Water Conservancy: Farmland improvement, irrigation channel excavation, small-scale earthworks

• Mining & Quarries: Ore loading, site leveling, material transfer

Expert Maintenance Tips

1. Model Confirmation and Selection

• 7029120048 (36+29) and 7029120047 (36+26) share the same front displacement but differ in rear displacement – verify original machine main pump displacement specifications to select the correct model.

• 7029122001 (33+29) features counter-clockwise rotation, while 7029120048/047 feature clockwise rotation – always confirm original machine rotation direction before installation.

• Always provide equipment serial number to confirm part compatibility.

2. Pre-Installation Checks

• Confirm pump rotation direction matches JCB original drive direction.

• Check drive shaft type (splined or parallel keyed) – never use hammer-driven installation; always use proper tools.

• Confirm port specifications (front 1 1/16″-12 UNF, rear 7/8″-14 UNF) precisely match hydraulic fittings.

3. First Start-Up & Oil Priming

• Prime the pump housing with clean hydraulic oil before first start-up; ensure suction line is fully filled – never run dry.

• Recommended fluid: JCB OEM-spec anti-wear hydraulic oil.

• 2″ SAE flange inlet – ensure suction line is unobstructed.

4. Filtration & System Flushing

• Thoroughly flush the hydraulic system before installing a new pump to prevent metal debris from a worn pump contaminating the new pump and destroying the entire hydraulic system.

• Maintain fluid cleanliness at ISO 4406 class 18/17/14 or better.

• Regularly monitor fluid cleanliness to prevent contaminants from accelerating gear and bearing wear.

5. Operating Monitoring

• Front pump maximum working pressure must not exceed 250 bar (7029120048/047) or 275 bar (7029122001); rear pump must not exceed 275 bar.

• Maximum input shaft torque 460 Nm (7029120048/047) or 325 Nm (7029122001).

• If any of the following failure symptoms occur, immediately shut down and inspect: lack of power on all hydraulic functions, very slow operation (especially with warm oil), loud “whining” pump operation indicating cavitation or seizure, hydraulic oil overheating, or metal filings in oil and filter.

• Completely depressurize the hydraulic system before pump replacement: lower all attachments to the ground and operate all levers with the engine off.