Cast iron Hydraulic Gear Pump 6PTF SAE C 4 Bolt

| Overview of HENGYUHANG 6PTF SAE C 4-Bolt Series Cast Iron Hydraulic Gear Pumps

The HENGYUHANG 6PTF SAE C 4-Bolt Series represents extreme-duty fluid power engineering, combining an all-cast-iron heavy-duty three-piece body architecture with a standard SAE "C" 4-bolt pilot mounting flange. Specifically engineered for severe high-pressure hydraulic circuits where conventional aluminum-casing pumps suffer structural fatigue, thermal expansion, or housing dilation, this series covers 14 standardized displacements ranging from 20 up to 1250 cm³/rev (20CC to 250CC). Engineered to withstand continuous working pressures up to 280 bar (4,060 psi) and peak spike pressures up to 350 bar (5,076 psi / 35 MPa), the 6PTF SAE C series delivers genuine 1:1 drop-in replacement across international manufacturers including CASAPPA, JIHOSTROJ, KRACHT, PARKER, DAVID BROWN, GPD, METARIS, and HYDRECO without requiring mounting bracket alterations or hydraulic piping redesigns.

Manufactured from high-strength compacted graphite and spheroidal ductile cast iron, the 6PTF housing features an optimized 160 × 187 mm casing envelope that eliminates pressure-induced flex and mechanical fatigue under violent cyclic loading. The internal rotating assembly incorporates high-precision alloy steel gears subjected to deep carburizing and quenching heat treatment for superior surface hardness and tooth bending fatigue strength. Heavy-duty hydrodynamic composite DU sleeve bearings with specialized anti-friction spray coatings ensure exceptional operational longevity under boundary lubrication conditions. Dual bi-metal copper pressure-balanced wear thrust plates dynamically compensate for operating clearances across varying thermal and pressure ranges, maintaining volumetric efficiencies above 94% across thousands of severe operating hours.

| Dimension of HENGYUHANG 6PTF SAE C 4-Bolt Series Cast Iron Hydraulic Gear Pumps

Interface data needed with the drawing:

| Pump Installation Specifications HENGYUHANG 6PTF SAE C 4-Bolt Series

The HENGYUHANG 6PTF SAE C 4-Bolt Series pump utilizes a standardized modular ordering and specification code to ensure precise mechanical, hydraulic, and mounting interchangeability:

Code structure — reference: 6PTF-SC — Heavy-Duty Cast Iron SAE C 4-Bolt Hydraulic Gear Pump Series

| Reading your replacement code

Techspecs — HENGYUHANG 6PTF SAE C 4-Bolt Series

Technical Performance Across Displacements

Working Liquid, Temperature & Kinematic Viscosity Specifications

Advantages — HENGYUHANG 6PTF SAE C 4-Bolt Series

Extreme Working Pressure up to 5,076 PSI / 35 MPa (350 bar)

High-density ductile cast iron body construction delivers unprecedented burst resistance, allowing sustained operation at 280 bar and intermittent peak pressures up to 350 bar across key displacement ranges (50 to 125 cm³/rev).

Rigid SAE C 4-Bolt Mounting Flange

Engineered with a heavy-duty pilot spigot (Ø 127.0 mm / 5.0 in) and robust 4-bolt square pattern (114.5 × 114.5 mm) within a solid 160 × 187 mm cast iron front housing, eliminating vibration and shaft misalignment under heavy torsional loads.

Heavy-Duty Special DU Composite Bearings

Engineered with patented anti-friction surface coatings to endure prolonged heavy radial loads and high-viscosity cold starting under boundary lubrication.

Copper Pressure-Balanced Wear Thrust Plates

High-grade bi-metal bronze thrust plates dynamically balance axial pressure, preserving optimal face clearance and sustaining volumetric efficiencies above 94% across all temperature regimes.

High-Precision Carburizing & Quenching Gears

Micro-geometry gear teeth subjected to deep carburizing and case hardening deliver extraordinary surface hardness, minimal meshing friction, and ultra-quiet operation.

100% Factory Multi-Parameter Testing

Every individual pump undergoes automated end-of-line testing for internal leakage, continuous and peak pressure holding, flow verification, and noise spectrum profiling before packaging.

Customized Mounting Sizes & Oil Ports

Flexible engineering configuration supports specialized splined/keyed shafts, custom split-flange ports, and integrated relief/unloader valves upon request.

Reference — HENGYUHANG 6PTF SAE C 4-Bolt Series

Series Architecture Across 6PTF Series

The HENGYUHANG 6PTF SAE C 4-Bolt Cast Iron family covers 14 standardized displacements, ensuring optimal hydraulic matching:

• Mid-Displacement High-Pressure Range (20 – 45 cm³/rev, up to 290 bar peak): 6PTF.20, 6PTF.25, 6PTF.32, 6PTF.40, 6PTF.45

• Ultra-High Pressure Heavy-Duty Range (50 – 125 cm³/rev, up to 350 bar peak / 35 MPa): 6PTF.50, 6PTF.63, 6PTF.70, 6PTF.80, 6PTF.90, 6PTF.100, 6PTF.112, 6PTF.125

• Maximum Delivery High-Flow Range (135 cm³/rev, up to 290 bar peak, 200 l/min output): 6PTF.135

Target Brand Interchangeability Matrix

The HENGYUHANG 6PTF SAE C 4-Bolt Series provides proven mechanical, mounting, and hydraulic drop-in substitution for the following major international hydraulic manufacturers:

• CASAPPA: POLARIS / PLATINUM (KP40 / PLP30 / 6PTF series) with SAE C 4-bolt mounting

• JIHOSTROJ: QHD1 / QHD2 / QHD3 Series heavy-duty cast iron hydraulic gear pumps with SAE C interface

• KRACHT: KP 3 / KP 5 Series high-performance cast iron gear pumps (SAE C mounting)

• PARKER Hannifin: Commercial Intertech PGP517 / PGP620 / PGP350 / PGP365 series cast iron gear pumps

• DAVID BROWN Hydraulics: PowrKraft / Hamworthy heavy mobile gear pumps

• GPD (Gear Pump Division): Cast iron commercial vehicle PTO and heavy mobile pumps

• METARIS (Hydraulex): MH30 / MH50 / MH75 heavy-duty cast iron external gear pumps

• HYDRECO Hydraulics: Heavy mobile implement and steering cast iron gear pumps

Brand Replacement

Quanzhou Hengyuhang Power Technology Co., Ltd. manufactures the 6PTF SAE C 4-Bolt Cast Iron Series conforming to international OEM heavy-duty mounting standards. Every manufactured pump undergoes 100% end-of-line verification, including volumetric efficiency benchmarking, continuous rated pressure testing, and port thread gauge inspection. Equipment operators and hydraulic distributors can replace worn or discontinued original pumps from CASAPPA, PARKER Commercial, JIHOSTROJ, KRACHT, DAVID BROWN, GPD, METARIS, and HYDRECO with zero alterations to existing bell housings, electric motor couplings, or hydraulic plumbing. Custom batch manufacturing with specialized drive shafts, special flange spigots, or integrated relief valves is fully supported.

Applications — HENGYUHANG 6PTF SAE C 4-Bolt Series

• Heavy Construction & Earthmoving Machinery: Large hydraulic excavators, wheel loaders, motor graders, bulldozers, and heavy backhoe auxiliary circuits.

• Mining, Drilling & Tunneling Equipment: Underground mining loaders, blast hole drill rigs, heavy crushing equipment, and tunneling auxiliary power units.

• Commercial Utility Vehicles & Heavy Truck Hydraulics: Heavy dump truck hoists, refuse compactor trucks, roll-off container loaders, and truck-mounted telescopic cranes.

• Agricultural & Forestry Harvesters: High-horsepower agricultural tractors, timber forwarders, feller bunchers, combine harvesters, and forestry skidders.

• Marine & Port Equipment: Deck winches, anchor windlasses, reach stackers, and mobile harbor crane drive systems.

• Heavy Industrial HPUs: High-pressure hydraulic forging presses, plastic extrusion hydraulic power packs, metal shearing lines, and scrap metal balers.

Package & Shipping

Why Choose Hengyuhang?

• Direct Factory Precision Manufacturing & CNC Excellence: Equipped with multi-axis CNC machining centers, high-precision gear hobbing machines, and automated micro-honing lines, Hengyuhang maintains sub-micron dimensional tolerances (Ra < 0.2 μm) on all internal gear teeth, journals, and housing cavities. This guarantees minimal internal friction, ultra-low hydraulic pulsation, and repeatable performance across high-volume production batches.

• 100% Full-Cycle Multi-Parameter Factory Inspection: Every single hydraulic pump undergoes rigorous end-of-line digital testing before dispatch. Quality checks cover full continuous rated and peak pressure hold, internal bypass leakage verification, high/low temperature volumetric efficiency testing (>94%), and acoustic noise spectrum profiling, ensuring zero-defect delivery to global OEM assembly lines.

• Seamless 1:1 OEM Drop-In Interchangeability: Conforming precisely to international European standard, SAE ("AA", "A", "B", "C"), and DIN/ISO mounting configurations, our pumps deliver genuine plug-and-play replacement for leading global manufacturers. Machine operators and distributors can replace original units without modifying bell housings, drive couplings, or hydraulic line geometry, drastically reducing costly machine downtime.

• Flexible Engineering Customization & Rapid Prototyping: Backed by an experienced in-house hydraulic engineering team, Hengyuhang offers comprehensive bespoke customization, including non-standard 4PTF/6PTF mounting flanges, special shaft tapers or splines, dual port configurations, and integrated relief or priority flow control valves. We support low-MOQ trial orders and agile custom prototyping to resolve obsolescence issues for out-of-production machinery.

• Robust Supply Chain, Extensive Inventory & Fast Global Dispatch: With dedicated raw material casting facilities, high-strength extruded aluminum alloy reserves, and extensive finished inventory across Group 0, Group 1, Group 2, and Group 3 platforms, standard orders ship within 48 to 72 hours. We partner strategically with major international logistics carriers (DHL, FedEx, UPS, air/ocean freight) to provide seamless door-to-door DDP global delivery.

• 12-Month Comprehensive Warranty & Lifetime Technical Support: All Hengyuhang hydraulic pumps are backed by a complete 12-month factory warranty and dedicated lifetime technical assistance. Our specialized fluid power engineers provide free 24-hour CAD drawing verification, OEM cross-reference confirmation, hydraulic displacement calculations, and system troubleshooting to ensure total operational peace of mind.