Parker 332/G7135 333/G5390 Gear Pump for JCB 3CX 4CX – 36+29cc

Product Overview

The Parker Hannifin 332/G7135 and 333/G5390 are OEM-specification tandem (dual-section) hydraulic gear pumps engineered specifically for JCB 3CX, 4CX, and other backhoe loader models. As the heart of the hydraulic system, these pumps deliver reliable pressure oil flow for loader, backhoe, steering, and auxiliary functions.

Both models feature identical displacement configurations and mounting interfaces — front pump 36 cc/rev, rear pump 29 cc/rev — with clockwise rotation (viewed from shaft end). They are fully interchangeable within the JCB OEM parts system.

As direct OEM replacement solutions, these products are manufactured to strict Parker technical standards, ensuring 100% interchangeability with original equipment. Every unit undergoes 100% simulated duty-cycle testing to validate volumetric efficiency, thermal performance, and seal integrity under rated load conditions — guaranteeing reliable operation in heavy-load, high-dust, and high-temperature environments.

Technical Specifications 

332/G7135 & 333/G5390 (Shared Specifications)

• Pump Type: Tandem (dual-section) gear pump

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

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

• Rotation: Clockwise (viewed from shaft end)

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

• Mounting Flange: SAE B, 2-bolt flange

• Inlet Port: Single 2″ SAE flange inlet

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

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

• Max. Input Shaft Torque: 460 Nm

• Weight: 26 kg

• Max. Working Pressure: 250 bar

• Compatible Machines: JCB 3C / 3CX / 3D / 4CX / 214 / 215 / 216 / 217 series

JCB OEM Cross-Reference Part Numbers:

• 332/G7135 replaces: 333/G5390, F14/73105, 7029120077, 7029120058

• 333/G5390 is the JCB OEM part number

Key Technical Advantages

1. Parker OEM Quality – 100% Drop-In Interchangeability

Manufactured to strict Parker Hannifin factory specifications, all mounting dimensions, flange interfaces, and spline shaft configurations are identical to original Parker pumps. End users can achieve direct drop-in replacement without any modifications — significantly reducing equipment downtime. The 332/G7135 and 333/G5390 are fully interchangeable, offering maximum procurement flexibility.

2. Tandem Pump Design – Two Pumps in One Compact Unit

The tandem (dual-section) gear pump configuration integrates two independent pump sections (front 36 cc/rev + rear 29 cc/rev) into a single housing, providing separate pressure oil sources for the main working hydraulics (loader/backhoe) and auxiliary systems (servo control/steering). This compact design saves installation space, reduces system complexity, and enhances overall hydraulic system reliability.

3. Precision-Ground Gears with Advanced Heat Treatment

Internal gear pairs are manufactured using precision grinding technology, achieving tooth profile accuracy meeting AGMA standards. Gear materials undergo case-carburizing and hardening heat treatment processes, delivering high surface hardness and exceptional wear resistance — capable of withstanding repeated high-load, high-speed冲击 over extended service life.

4. High-Strength Cast Iron Housing with Roller Bearings – Built for Harsh Conditions

The pump housing is constructed from high-strength cast iron with roller bearing construction, offering excellent rigidity, durability, and contamination tolerance. In demanding environments such as construction sites, mining operations, and agricultural fields — characterized by high dust levels, strong vibration, and extreme temperature fluctuations — the cast iron housing and roller bearing combination effectively protects internal precision components against external impact, thermal distortion, and oil contamination.

5. Broad JCB Model Compatibility

The 332/G7135 and 333/G5390 are compatible with JCB backhoe loader models 3C, 3CX, 3D, 4CX, 214, 215, 216, 217, and more, as well as JCB excavator models JS200, JS220, JS330, JS360, JS460. A single model covers a wide range of equipment types, significantly simplifying spare parts inventory management.

Application Areas

The Parker 332/G7135 / 333/G5390 series tandem gear pumps are widely compatible with the following JCB equipment models:

JCB Backhoe Loaders:

• JCB 3C / 3CX Series (including 3CXD14M2NM TIER 2, 3CXD14M3NM TIER 3)

• JCB 3D / 3DX Series

• JCB 4C / 4CN / 4CX Series

• JCB 214 / 215 / 216 / 217 Series (including 214e)

• JCB 3CX Sideshift / Centremount with various control configurations (Easycontrol / Direct Control / AWS / 2WS)

JCB Excavators:

• JCB JS200, JS220, JS330, JS360, JS460

Expert Maintenance Tips

1. Verify Rotation Direction – Critical Step

Both 332/G7135 and 333/G5390 feature clockwise rotation (viewed from shaft end) . Always confirm the rotation direction of the original pump before installation. Incorrect selection will result in pump malfunction or catastrophic failure.

2. Understanding 332/G7135 and 333/G5390 Interchangeability

Both models feature identical technical specifications and mounting dimensions and are fully interchangeable within the JCB OEM parts system. The 332/G7135 can directly replace the 333/G5390, and vice versa. However, we recommend verifying the model number on the original pump nameplate before purchasing.

3. Prime the Pump Before First Start

Fill the pump cavity with clean hydraulic fluid through the inlet port prior to initial startup. Dry-starting will cause rapid wear to gears and bearings under unlubricated conditions, potentially leading to catastrophic pump failure.

4. Replace Hydraulic Oil and Filters Simultaneously

When replacing the main hydraulic pump, we strongly recommend replacing all hydraulic oil and filters at the same time. Metal particles and contaminants in old oil will rapidly damage new pump internal components. The suction flange O-ring must also be replaced to ensure 100% seal on the suction line and prevent cavitation.

5. Maintain Fluid Cleanliness

For optimal Parker pump service life, we recommend a minimum filtration level of ISO 4406 19/17/14 or NAS 1638 Class 8. Regularly inspect filter elements to prevent contaminants from accelerating gear and bearing wear.

6. Periodic Torque Check on Mounting Bolts

Given the common use of these pumps in high-vibration equipment, we recommend checking mounting bolt and flange bolt torque every 500 operating hours to prevent loosening-induced leakage or misalignment.

7. Fault Diagnosis Indicators

Immediately shut down and inspect if any of the following abnormalities occur:

• Unusual increase in pump operating noise (whining, grinding) – may indicate cavitation or bearing damage

• Noticeably slower hydraulic operation (both loader and backhoe sluggish) – despite normal engine RPM

• Loss of power – machine cannot lift rated loads or “stalls” under load

• Rapid overheating of hydraulic oil