CASAPPA Replacements
CASAPPA Hydraulic Gear Pump KP30.46D0
The HENGYUHANG 4PTF Customized Series is a high-precision, heavy-duty cast-iron external hydraulic gear pump engineered specifically as a direct-fit replacement for CASAPPA KP30.46D0-33S3LGC/GF-N, with architectural design extensions covering the high-pressure KAPPA KP35 and KP40 platforms. Tailored to solve equipment obsolescence and non-standard mounting challenges on OEM machinery, this 4PTF customized configuration provides 100% mechanical and hydraulic interchangeability without necessitating machine bell-housing alterations or hydraulic pipework reconfiguration. Delivering a nominal geometric displacement of 46.34 cm³/rev (2.83 in³/rev), the pump integrates a specialized 4PTF 4-bolt rectangular spigot mounting flange (code S3), a high-torque precision drive shaft (code 33), side-positioned BSPP threaded ports (inlet GC G 1-1/4", outlet GF G 1"), standard Buna-N elastomeric seals (code N), and clockwise rotation without outboard bearing (code D0). Constructed entirely from high-tensile spheroidal ductile cast iron, it provides exceptional casing rigidity and fatigue resistance under severe continuous operating pressures up to 250 bar (3,625 psi), intermittent pressures up to 270 bar (3,915 psi), and peak pressure spikes reaching 290 bar (4,205 psi), delivering factory-standard volumetric efficiency and long-term durability under heavy mobile and industrial duty cycles.
| HENGYUHANG 4PTF (CASAPPA KP30.46 Replacement) Applications
This customized 4PTF gear pump assembly is engineered for machinery requiring specialized 4-bolt mounting geometries and high-flow, high-pressure hydraulic circuits. It powers primary implement and steering circuits across heavy-duty mobile machinery, including construction excavators, front-end wheel loaders, asphalt pavers, vibratory road rollers, backhoe loaders, mobile drilling rigs, and heavy-duty industrial forklifts. In agricultural and forestry sectors, it provides dedicated hydraulic power for timber harvesters, forwarders, high-power tractors, and forestry winches. Furthermore, its custom mounting geometry and heavy cast-iron body make it ideal for stationary industrial hydraulic power packs (HPUs), metal scrap processing balers, injection molding clamping units, and marine deck winches where standard commercial off-the-shelf pumps cannot fit existing bell housings or withstand extreme continuous cyclical pressure spikes.
Key parameters
Product Models: HENGYUHANG 4PTF Customized Series / Direct Replacement for CASAPPA KP30.46D0-33S3LGC/GF-N
Brand Replacement: CASAPPA OEM Replacement (KP30.46, KP35, KP40 Series) or as requested.
Displacement Options: 46.34 cm³/rev (2.83 in³/rev) standard; custom range spanning 19.63 to 180.73 cm³/rev
Rotation Direction: Clockwise (D), looking at the drive shaft (anti-clockwise version available as code S)
Continuous Operating Pressure (p1): 250 bar (3,625 psi)
Peak Pressure (p3): Up to 290 bar (4,205 psi)
Mounting & Drive Shaft: 4PTF 4-bolt heavy-duty spigot flange (S3) with precision heavy-duty drive shaft (33)
Min./max. speed (350 / 2,800 r/min), relief-valve settings, interface data, and tightening torques are listed in full in Techspecs below.
| Overview of HENGYUHANG 4PTF Series (Replacement for CASAPPA KP30.46D0-33S3LGC/GF-N)
The HENGYUHANG 4PTF Customized Series represents specialized engineering tailored to replace CASAPPA KP30.46D0-33S3LGC/GF-N hydraulic pumps on heavy equipment where standard commercial SAE or European standard flanges cannot be mounted. Designed with exact dimensional fidelity to the original 4PTF 4-bolt spigot flange and precision drive shaft, it eliminates expensive machine modifications, intermediate adapter plates, and downtime associated with obsolete OEM stock.
Built around high-tensile spheroidal graphite ductile cast iron (front mounting flange, gear casing, and rear end-cover), the pump provides high structural rigidity and superior acoustic dampening, preventing housing barrel expansion under heavy continuous digging and lifting pressures above 250 bar. Inside, a high-precision case-hardened alloy steel gear pair rotates on hydrodynamic PTFE DU sleeve bearings lubricated by internal fluid slip channels. Floating bronze-faced hydrostatic thrust balance plates automatically compensate for thermal expansion and face wear, maintaining volumetric efficiency above 95% over thousands of operating hours. The specialized port combination (GC inlet G 1-1/4" / GF outlet G 1") ensures streamlined laminar fluid flow, eliminating intake cavitation and high-pressure throttling losses.
| Dimension of HENGYUHANG 4PTF Series (Replacement for CASAPPA KP30.46D0-33S3LGC/GF-N)
Reference dimensions for the HENGYUHANG 4PTF customized gear pump assembly with 4-bolt rectangular/spigot mounting flange (S3) and side-mounted threaded/flanged ports. The letters correspond to the dimensional drawing.
| Ref. | mm | in | Description |
|---|---|---|---|
| L | 196.5 | 7.74 | Total pump length from mounting flange face to rear cover |
| A | 148.0 | 5.83 | Centerline of inlet and outlet ports from mounting face |
| B | 102.5 | 4.04 | Centerline of port from pump body rear face |
| D | 80.0 / 100.0 | 3.15 / 3.94 | 4PTF precision pilot spigot diameter (+0 / -0.05 mm) |
| S1 | 72.0 | 2.83 | Horizontal center-to-center distance between mounting bolt holes |
| S2 | 100.0 | 3.94 | Vertical center-to-center distance between mounting bolt holes |
| H | 164.0 | 6.46 | Overall pump body height |
| W | 148.0 | 5.83 | Overall pump body width |
Interface data needed with the drawing:
| Item | Value |
|---|---|
| Mounting flange | S3 — 4PTF 4-bolt rectangular heavy-duty spigot flange (pilot Ø 80.0 mm or 100.0 mm) |
| Drive shaft | 33 — Heavy-duty precision cylindrical keyed / European tapered 1:8 / splined drive shaft |
| Outboard bearing | 0 — without outboard bearing (direct bell-housing coupling engagement) |
| Rotation | D — clockwise, looking at the drive shaft end (S anti-clockwise optional) |
| Ports position | L — side-positioned ports (inlet and outlet on opposite lateral body faces) |
| Inlet Port (GC) | G 1-1/4" BSPP female threaded port (ISO 228/1) with flat O-ring sealing face |
| Outlet Port (GF) | G 1" BSPP female threaded port (ISO 228/1) with flat O-ring sealing face |
| Seals | N — Buna NBR standard (Viton-FKM available for high-temperature applications) |
| Body construction | High-strength spheroidal graphite ductile cast iron (two-piece heavy-duty structure) |
| Mounting flange bolt tightening torque | 80 ±5 Nm (708 ÷ 752 lbf in) |
| Body tie-rod clamp bolt torque | 140 ±14 Nm (1,115 ÷ 1,363 lbf in) |
| Pump Installation Specifications HENGYUHANG 4PTF Series
The pump designation follows a structured 10-segment matrix defining displacement, mechanical interfaces, and customization parameters:
Code structure — reference: HENGYUHANG 4PTF — KP 30.46D0-33S3LGC/GF-N Replacement
| Pos. | Code | Meaning & Replacement Configuration |
|---|---|---|
| 1 | KP30 | Pump Series: KAPPA 30 cast-iron external gear pump architecture |
| 2 | 46 | Displacement: Nominal 46.34 cm³/rev (2.83 in³/rev) |
| 3 | D | Direction of rotation: Clockwise (looking at drive shaft); S for anti-clockwise |
| 4 | 0 | Outboard bearing: Without outboard bearing |
| 5 | 33 | Drive shaft: Precision heavy-duty shaft (cylindrical keyed / tapered / spline) |
| 6 | S3 | Mounting flange: 4PTF 4-bolt heavy-duty pilot spigot mounting flange |
| 7 | L | Ports position: Side-positioned ports |
| 8 | GC/GF | Port configuration: Inlet GC (G 1-1/4" BSPP) / Outlet GF (G 1" BSPP) |
| 9 | N | Seals: Buna-N (NBR) elastomeric seals (temperature -25 °C to +80 °C) |
| 10 | Custom | 4PTF tailored production specification for exact OEM drop-in fitment |
| Reading your code & replacement cross-references
| HENGYUHANG Model Code | Replaces CASAPPA OEM Code | Frame Platform | Displacement | Mounting Flange | Porting (In/Out) | Primary Machine Focus |
|---|---|---|---|---|---|---|
| HYH-4PTF-KP30.46D0-33S3LGC/GF-N | KP30.46D0-33S3LGC/GF-N | KP 30 | 46.34 cm³/rev | 4PTF 4-Bolt (S3) | G 1-1/4" / G 1" | Custom excavator / industrial power pack |
| HYH-4PTF-KP30.34D0-33S3LGC/GF-N | KP30.34D0-33S3LGC/GF-N | KP 30 | 34.56 cm³/rev | 4PTF 4-Bolt (S3) | G 1-1/4" / G 3/4" | Mobile crane / paver auxiliary implement |
| HYH-4PTF-KP30.38D0-33S3LGC/GF-N | KP30.38D0-33S3LGC/GF-N | KP 30 | 39.27 cm³/rev | 4PTF 4-Bolt (S3) | G 1-1/4" / G 3/4" | Forestry winch / road compactor |
| HYH-4PTF-KP35.50D0-Custom | KP35.50-4PTF Series | KP 35 | 51.00 cm³/rev | 4PTF Tailored Flange | Flanged SAE 1-1/2" / 1" | Heavy backhoe loader main implement |
| HYH-4PTF-KP40.73D0-Custom | KP40.73-4PTF Series | KP 40 | 73.40 cm³/rev | 4PTF Tailored Flange | Flanged SAE 2" / 1-1/4" | Large earthmoving excavator hydraulic loop |
Techspecs — HENGYUHANG 4PTF Series (Replacement for CASAPPA KP30.46D0-33S3LGC/GF-N)
Performance
| Parameter | KP30.46 Replacement | KP35 Platform | KP40 Platform | Unit |
|---|---|---|---|---|
| Geometric Displacement | 46.34 (2.83) | 51.00 (3.11) | 73.40 (4.48) | cm³/rev (in³/rev) |
| Continuous Operating Pressure p1 | 250 (3,625) | 260 (3,770) | 240 (3,480) | bar (psi) |
| Intermittent Operating Pressure p2 | 270 (3,915) | 280 (4,060) | 260 (3,770) | bar (psi) |
| Peak Pressure p3 | 290 (4,205) | 300 (4,350) | 280 (4,060) | bar (psi) |
| Maximum Continuous Speed | 2,800 | 2,800 | 2,500 | r/min |
| Minimum Operating Speed | 350 | 350 | 350 | r/min |
| Theoretical Flow @ 1,500 r/min | 69.5 (18.4) | 76.5 (20.2) | 110.1 (29.1) | l/min (US gpm) |
| Theoretical Flow @ 2,200 r/min | 101.9 (26.9) | 112.2 (29.6) | 161.5 (42.7) | l/min (US gpm) |
| Max. Allowable Drive Shaft Input Torque | 380 (3,363) | 480 (4,248) | 650 (5,753) | Nm (lbf in) |
| Volumetric Efficiency | ≥ 95% | ≥ 95% | ≥ 95% | — |
| Hydro-mechanical Efficiency | ≥ 90% | ≥ 90% | ≥ 90% | — |
| Unit Mass (Approximate) | 23.5 (51.8) | 28.0 (61.7) | 36.5 (80.5) | kg (lbs) |
Interfaces and configuration
| Parameter | Value |
|---|---|
| Rotation | D — clockwise, looking at the drive shaft end (S anti-clockwise available) |
| Mounting flange | S3 — 4PTF 4-bolt rectangular/spigot pilot flange (custom dimensions verified per order) |
| Drive shaft | 33 — Heavy-duty precision cylindrical keyed / tapered / splined shaft |
| Ports position | L — side-positioned ports (lateral inlet and outlet) |
| Inlet Port (GC) | G 1-1/4" BSPP female thread (ISO 228/1) with flat O-ring sealing face |
| Outlet Port (GF) | G 1" BSPP female thread (ISO 228/1) with flat O-ring sealing face |
| Outboard bearing | 0 — without outboard bearing |
| Seals | N — Buna NBR standard (Viton-FKM high-temperature optional) |
| Construction | High-tensile spheroidal ductile cast iron body and end-covers |
| Flange bolt tightening torque | 80 ±5 Nm (708 ÷ 752 lbf in) |
| Body tie-rod clamp bolt torque | 140 ±14 Nm (1,115 ÷ 1,363 lbf in) |
Operating conditions
| Parameter | Value |
|---|---|
| Fluid | Mineral-oil-based hydraulic fluid to ISO 6743/4 (HL, HLP) and DIN 51524 |
| Inlet pressure range (absolute) | 0.7 ÷ 3.0 bar abs. (10 ÷ 44 psi abs.) |
| Viscosity — recommended | 17 to 60 mm²/s (cSt) [85 to 280 SSU] |
| Viscosity — permissible range | 12 to 1,000 mm²/s (cSt) [65 to 4,600 SSU] |
| Cold start maximum viscosity | 2,000 mm²/s (cSt) [9,270 SSU] |
| Fluid temperature, N seals | −25 °C to +80 °C continuous (−13 °F to +176 °F); 100 °C (212 °F) peak |
| Fluid temperature, V seals | −20 °C to +110 °C continuous (−4 °F to +230 °F); 125 °C (257 °F) peak |
| Recommended contamination level | Δp > 210 bar: NAS 1638 class 8 / ISO 4406 19/17/14 (10 μm filter element β10(c) ≥ 200) |
| Permissible contamination level | Δp < 140 bar: NAS 1638 class 10 / ISO 4406 21/19/16 (25 μm filter element) |
| Storage conditions | Dry environment, 5 °C to 20 °C (41 °F to 68 °F), maximum 24 months |
| Dimensions | see section 2. |
Advantages — HENGYUHANG 4PTF Customized Series
Direct OEM Drop-In Compatibility
Manufactured to replicate exact CASAPPA 4PTF mounting interfaces, pilot diameters, shaft dimensions, and port spacings, eliminating expensive machinery re-engineering or bell-housing machining.
100% High-Grade Ductile Cast-Iron Construction
High structural rigidity resists casing deflection under heavy digging and lifting operations, preventing internal pressure loss and barrel fatigue cracking.
High Pressure Rating for Severe Duty Cycles
Continuously operates at 250 bar (3,625 psi) with peak resistance to 290 bar (4,205 psi), handling sudden shock loads during machine stall or heavy load breakout.
High Volumetric Efficiency
Floating pressure-balanced hydrostatic thrust plates ensure axial sealing clearances are maintained across all temperature and pressure ranges, achieving volumetric efficiency above 95%.
Anti-Cavitation Optimized Porting
GC (G 1-1/4") and GF (G 1") porting profile promotes laminar flow intake, minimizing oil aeration, turbulence, and noise under maximum operating speeds.
Flexible Platform Scaling (KP30 / KP35 / KP40)
Customization options span multiple displacement brackets from 19.63 to 180.73 cm³/rev, allowing equipment builders to select the exact flow rate required for custom duty cycles.
6. Reference of HENGYUHANG 4PTF Series
6.1 Series architecture across KP30, KP35, and KP40
| Frame Size | Displacement Range | Continuous Pressure (p1) | Peak Pressure (p3) | Speed Range | Application Focus |
|---|---|---|---|---|---|
| KP30 | 19.63 to 46.34 cm³/rev | 230 to 280 bar | 270 to 300 bar | 350 to 3,000 r/min | Compact excavators, pavers, industrial HPUs |
| KP35 | 40.00 to 65.00 cm³/rev | 250 to 280 bar | 280 to 300 bar | 350 to 2,800 r/min | Mid-heavy backhoes, wheel loaders, mobile cranes |
| KP40 | 61.43 to 180.73 cm³/rev | 200 to 260 bar | 230 to 280 bar | 350 to 2,500 r/min | Heavy mining excavators, large industrial presses |
6.2 Complete order numbers and custom replacement equivalents identified on the market
Complete pump order and designation codes identified for this product group:
| Order number |
| HENGYUHANG 4PTF-KP30.46D0-33S3LGC/GF-N (Replaces CASAPPA KP30.46D0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP30.34D0-33S3LGC/GF-N (Replaces CASAPPA KP30.34D0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP30.38D0-33S3LGC/GF-N (Replaces CASAPPA KP30.38D0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP30.46S0-33S3LGC/GF-N (Replaces CASAPPA KP30.46S0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP35.50D0-Custom (Replaces CASAPPA KP35 4PTF series) |
| HENGYUHANG 4PTF-KP40.73D0-Custom (Replaces CASAPPA KP40 4PTF series) |
7. Brand Replacement
HENGYUHANG specializes in custom OEM replacement manufacturing for CASAPPA hydraulic gear pumps, specifically the 4PTF specialized model KP30.46D0-33S3LGC/GF-N as well as custom variants across the KP30, KP35, and KP40 series. By utilizing high-precision CNC machining and custom tooling, HENGYUHANG manufactures exact dimensional replicas of 4PTF flanges, unique shaft profiles, and port positions, allowing fleet operators and machine builders to replace specialized or discontinued Casappa assemblies without altering engine couplings, mounting brackets, or hydraulic plumbing.
All custom replacement units are manufactured to rigorous metallurgical standards and undergo 100% hydraulic testing to verify flow rates, pressure holding, and internal seal integrity. Customers can order customized units by providing original nameplate data, dimensional drawings, or sample units.
8. Applications of HENGYUHANG 4PTF Series
Typical equipment applications of the 4PTF customized gear pump series:
Construction Machinery: Mobile excavators, compact track loaders, vibratory road rollers, asphalt pavers, and trenching equipment.
Earthmoving Equipment: Front-end wheel loaders, backhoe loader implement circuits, and compaction machines.
Material Handling & Lifting: Telescopic material handlers, rough-terrain forklifts, truck-mounted cranes, and aerial work platforms.
Forestry & Agriculture: Timber forwarders, log splitters, high-capacity tractor implement pumps, and wood chippers.
Industrial Hydraulics: Hydraulic power units (HPUs), metal scrap compactors, injection molding machines, and industrial test benches.
Special Purpose Vehicles: Municipal sweepers, refuse collection trucks, vacuum suction units, and fire-fighting hydraulic systems.
In all applications, the pump delivers stable continuous high-pressure fluid flow under challenging ambient temperatures, high shock loads, and continuous duty cycles.
9. Package & Shipping
| Item | Specification |
|---|---|
| Packaging | Single unit packed in heavy-duty export wooden crate with protective port plugs and shock-absorbing foam |
| Selling unit | Single item — MOQ 1 unit |
| Net weight | Approximately 23.5 kg (KP30.46) to 36.5 kg (KP40) depending on configuration |
| Gross weight | Approximately 26.0 kg to 39.5 kg with export wooden crate packaging |
| Lead time | 3 to 7 working days for standard customized configurations; volume batches per production schedule |
| Shipping | Air freight, ocean shipping, or international express (DHL, FedEx, UPS) directly to destination |
| Customization | Full customization of mounting flanges, shaft styles, port configurations, and laser nameplates |
| Warranty | 1 year comprehensive warranty against manufacturing defects |
10. Why Choose Hengyuhang?
Custom Hydraulic Manufacturing Specialist. Quanzhou Hengyuhang Power Technology Co., Ltd. is located in Fujian, China, specializing in customized, non-standard, and OEM-equivalent hydraulic gear pumps, motors, and multi-section pump assemblies.
One-Piece Minimum Order Quantity. Custom-engineered units available with an MOQ of just 1 piece, eliminating high-volume tooling barriers for single-machine repairs and prototype testing.
Full Non-Standard 4PTF Engineering Capability. Expertise in reverse-engineering and manufacturing specialized mounting flanges, unique shaft tapers/splines, and metric/BSPP port configurations.
100% Computerized Hydraulic Testing. Every custom-built pump is thoroughly bench-tested under full operating pressure, verifying volumetric efficiency, mechanical torque, and external seal integrity prior to shipment.
Multi-Platform Architecture (KP30 / KP35 / KP40). Extensive engineering coverage across all KAPPA frame sizes, supporting single, tandem, and triple custom pump configurations.
Fast Global Logistics. Direct connections to international logistics networks ensure prompt delivery of custom replacement pumps to minimize costly machinery downtime.
One-Year Comprehensive Warranty. Full 12-month warranty backed by responsive engineering support for fitment confirmation and commissioning.
CASAPPA KP30.46D0-33S3LGC/GF-N Cast Iron External Hydraulic Gear Pump is a high-pressure, fixed-displacement external gear pump from the CASAPPA KP30 (Group 3) series. Built with a solid high-strength cast iron body, precision-machined gears, and pressure-balanced wear plates, it delivers 46 cm³/rev nominal displacement, 250 bar rated pressure, and up to 3000 min⁻¹ maximum rotational speed. Engineered for demanding industrial and mobile applications, it offers high volumetric efficiency, smooth fluid delivery, low noise emission, and long operational life under continuous heavy-duty operating cycles.
| Applications
The KP30.46D0-33S3LGC/GF-N gear pump is widely deployed across construction and heavy machinery (excavators, wheel loaders, cranes, bulldozers), agricultural equipment (tractors, harvesters), industrial manufacturing systems (automated assembly lines, hydraulic presses, conveyors), and mobile material handling machinery (forklifts, aerial platforms), providing dependable hydraulic power under continuous high-load conditions.
| Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | CASAPPA (OEM / direct replacement) |
| Model | KP30.46D0-33S3LGC/GF-N |
| Series | KP30 (Group 3) |
| Product Type | Cast iron external hydraulic gear pump (single pump) |
| Housing Material | High-strength cast iron |
| Nominal Displacement | 46 cm³/rev (2.81 in³/rev, per model code) |
| Rated Operating Pressure | 250 bar (3625 psi) |
| Peak Pressure | 280 bar (per manufacturer documentation—confirm before use) |
| Max. Speed | 3000 min⁻¹ |
| Flow @ 1500 rpm | 69.0 L/min (theoretical, displacement × 1500 rpm) |
| Efficiency | >90% overall efficiency |
| Mounting Flange and Shaft | Flange mounted — code 33S3 (per model code) |
| Port Configuration | LGC / GF threaded ports (per model code) |
| Rotation Direction | Clockwise (D0) / N rotation code (confirm against nameplate) |
| Hydraulic Fluid | Mineral hydraulic oil (ISO VG 46 / HLP) |
| Operating Temperature Range | -20°C to +80°C |
| Typical Applications | Excavators, cranes, loaders, agricultural machinery, industrial power units |
| Order number |
| HENGYUHANG 4PTF-KP30.46D0-33S3LGC/GF-N (Replaces CASAPPA KP30.46D0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP30.34D0-33S3LGC/GF-N (Replaces CASAPPA KP30.34D0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP30.38D0-33S3LGC/GF-N (Replaces CASAPPA KP30.38D0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP30.46S0-33S3LGC/GF-N (Replaces CASAPPA KP30.46S0-33S3LGC/GF-N) |
| HENGYUHANG 4PTF-KP35.50D0-Custom (Replaces CASAPPA KP35 4PTF series) |
| HENGYUHANG 4PTF-KP40.73D0-Custom (Replaces CASAPPA KP40 4PTF series) |
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