Precision Engineering & Conversion Solution Solves Discontinued Hydraulic Motor Challenge for European Excavator

A European excavator repair and spare parts dealer received an urgent request from an end-user client. An aging Bobcat 322 Mini Excavator suffered severe oil leakage and internal wear in its Rotating Hydraulic Motor, causing a complete operational breakdown.

The client initially attempted to source OEM parts or original repair kits (Char-Lynn / Danfoss nameplate series), but ran into two major roadblocks:

• OEM Discontinuation & Stock Shortage: Neither domestic nor international suppliers had original Char-Lynn matching motors in stock.
• Sealing Kit Alone Couldn't Solve the Root Cause: Although the client initially inquired about a Gasket / Sealing Kit, technical assessment indicated overall performance degradation of the motor. Replacing seals alone posed a high risk of secondary failure, creating an urgent need for a cost-effective complete hydraulic motor replacement solution.

Based on the Char-Lynn nameplate data (104-3177-006) provided by the client and the original hydraulic system requirements of the Bobcat 322, the Hydstar Hydraulic technical team conducted precise parameter matching and replacement evaluation:

* Note: While maintaining 100% physical mounting compatibility, the Hydstar replacement motor increased maximum allowable pressure by approximately 25%, delivering stronger rotation torque and an extended service life.

Upon confirming OEM stock shortages, the client remained cautious about transitioning to an aftermarket alternative. To address concerns regarding mounting dimensions and hydraulic circuit connections, Hydstar Hydraulic demonstrated engineering expertise and fast execution:

1. Precise Matching & Immediate Stock Allocation: The technical team identified a direct-replacement hydraulic motor that met all performance metrics and locked in factory inventory to ensure immediate dispatch.
2. Visualized Piping & Conversion Support: Addressing interface layout differences (High-pressure ports A/B vs. Drain port T), Hydstar synthesized the Bobcat 322 hydraulic schematic and generated a clear Port Connection Diagram, explicitly detailing port logic and rotation adjustment procedures.

1. Transparent Pricing & Express Logistics: Hydstar provided transparent ex-factory pricing along with door-to-door airfreight options, helping the client rapidly secure order confirmation from their end user.

"The diagram I made clearly illustrates my approach." — Hydstar's technical guidance and intuitive schematics completely removed the client's conversion concerns.

Following airfreight delivery, the client completed installation and testing according to Hydstar's guidance diagram.

• Smooth Installation & Flawless Operation: Although initial line reversal caused rotation direction variance, the client quickly adjusted piping according to Hydstar's instructions ("If the swing direction is reversed during testing, simply interchange the A and B high-voltage tubes"). The mini excavator restored normal swing operation effortlessly.
• High Praise from End-User: The client reported back: "Client is satisfied!" Resolving the downtime crisis significantly boosted the dealer's local reputation.
• Long-term Trust & Product Line Expansion: Impressed by the technical support and product quality, the client placed a follow-up bulk inquiry immediately after successful commissioning: "Next order I want to buy many many hydraulic adaptors."