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Product Advantage
WHST40-03 Housing is the core structural casing of the 45CC HST hydraulic continuously variable transmission system for World Harvester combine harvesters. As the main skeleton of the HST pump unit, it holds and protects internal precision components including plungers, valve plates, bearings and oil seal assemblies, maintaining stable high-pressure oil circulation for the harvester’s walking drive system.
Manufactured from high-strength cast iron with precision CNC machining, this HST housing delivers excellent pressure resistance, impact resistance and deformation resistance. Strict casting and surface treatment prevent oil leakage and internal component damage under heavy load, muddy field and continuous high-temperature harvesting conditions. Perfect replacement when original housing cracks, deforms or has thread failure, helping you eliminate HST oil leaks and avoid unexpected machine downtime during peak harvest season.
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Provide structural support and positioning Position the plunger components, distribution plate, inclined plate, drive shaft, etc. along the standard axis to ensure the geometric accuracy of the hydraulic pump. | Forming a high-pressure oil circuit chamber The housing is equipped with high-pressure oil circuits, return oil chambers, and directional oil passages, corresponding to the high-pressure and low-pressure areas required for HST operation. | Carrying external installation points Including installation ears, bolt hole positions, oil port interfaces, etc., used for connecting with the harvester chassis, drive system, or hose oil circuit. | Protect internal components Housing is made of high-strength cast iron or aluminum alloy castings, with strong pressure resistance, effectively avoiding damage to internal precision parts caused by external impact or oil contamination. |
Technical Parameters
| ITEMS | DESCRIPTION |
| Name | Housing |
| Code | WHST40-03 |
| Weight | 1.48 1 piece/set |
| Size(mm) | φ(lower):36 φ(upper):25 Φ:96 H:73 |
We supply full range World Harvester HST spare parts including cylinder block, plunger, valve plate, shaft and seal kits. All parts are inspected before shipment. Global shipping and after-sales technical support for model matching. Contact us for wholesale price list.
Product Uses
Replacement & maintenance for World Harvester HST hydraulic walking system. Ideal for farm repair shops, machinery distributors and large farm fleet maintenance. Bulk order available for parts resellers with competitive factory pricing.
Q: Which harvester models does WHST40-03 housing fit?
A: It fits World Harvester combine harvesters equipped with 45CC HST, including 4LZ-6.0P, AW70, AW82, AW85 series. Please provide your machine serial number for confirmation.
Q: Can I buy mixed HST parts in one bulk order?
A: Yes, we support mixed order of HST housing, cylinder block, bearing, transmission parts and roller parts.
Q: What is the lead time?
A: Stock items ship within 3-7 working days. Large bulk orders take 15-25 days.
Product Operate Guide
Precautions for replacement and maintenance
Housing is an irreparable part, and once cracks, deformations, or damage to the sealing surface occur, the assembly must be replaced.
When replacing, synchronous inspection is required:
Wear of distribution plate
Plunger Assembly
Slant plate wear
Bearings and oil seals
The installation must maintain cleanliness (NAS grade 8-9) to prevent particles from entering the plug holes.
Pressure and leakage tests should be conducted before starting the machine.
Product Video
