The Parker 87434673 is a tandem double gear pump from the PGP330 series, purpose-built for Case 580SM Series 2 and Series 3 backhoe loaders. With a dual-section displacement of 36+29 cc/rev and a 15-tooth spline shaft, it delivers consistent hydraulic flow to both the loader and backhoe circuits simultaneously.
Dual-section design (36+29cc) — powers loader and backhoe functions independently for smooth, responsive multi-function operation
Cast iron PGP330 construction — withstands high-pressure duty cycles up to 3,500 psi with minimal wear
Direct OEM replacement — drop-in fit for Case 580SM Series 2 (2004–2008) and Series 3, no modifications needed
15-tooth spline shaft — precise engagement with the engine drive coupling for reliable torque transfer
Case 580SM Series 2, Case 580SM Series 3, Case 580SM+ Series 2 backhoe loaders. Cross-reference: 3249120345.
The Parker PGP330 series is the industry benchmark for construction equipment gear pumps. The 87434673 model features a tandem pump body that integrates two independent gear sections — 36cc and 29cc — into a single compact housing. This dual-pump configuration eliminates the need for separate pumps and complex plumbing, reducing installation time and potential leak points.
Every 87434673 pump is manufactured with high-grade cast iron housing and precision-ground gears. The cast iron construction provides superior resistance to thermal expansion and pressure spikes compared to aluminum alternatives, making it ideal for backhoe loaders that operate in dusty, high-temperature job site conditions. Each unit undergoes hydraulic bench testing to verify flow rate, pressure holding, and volumetric efficiency before shipment.
At HYH Hydraulics, we maintain dedicated stock of the 87434673 to support urgent equipment downtime. Our direct sourcing from Parker-authorized channels ensures genuine components — no gray-market substitutes. We offer flexible order quantities from single-unit replacements to bulk fleet orders, with express shipping available for emergency breakdowns.
Case 580SM Series 2 / Series 3 backhoe loader main hydraulic pump
Loader lift, tilt, and bucket control circuits
Backhoe boom, arm, and bucket hydraulic functions
Construction, utility, and municipal fleet maintenance
| Parameter | Specification |
|---|---|
| Part Number | 87434673 |
| Cross Reference | 3249120345 |
| Pump Type | Double Gear Pump (Tandem) |
| Series | Parker PGP330 |
| Displacement (Front Section) | 36 cc/rev |
| Displacement (Rear Section) | 29 cc/rev |
| Shaft Type | 15-Tooth Spline |
| Housing Material | Cast Iron |
| Max Operating Pressure | 241 bar (3,500 psi) |
| Rotation | Clockwise |
| Compatible Models | Case 580SM Series 2, 580SM Series 3, 580SM+ Series 2 |
| Model Years | 2004–2008 (Series 2) |
| Application | Backhoe Loader Main Hydraulic Pump |
| Warranty | 12 Months |
No. 173, Xiacuo, Sihuang Village, Xiamei Town, Nan 'an City, Fujian Province