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Shantui SL50WN wheel loader full hydraulic steering control unit BZZ-1000 TLF1-E1000C
FUNCTION
1. As a fully hydraulic steering control unit, it converts the mechanical input from the driver turning the steering wheel into hydraulic signals, controlling the extension and retraction of the steering hydraulic cylinder to effect vehicle steering.
2. Suitable for Load Sensing hydraulic systems, it automatically adjusts oil pressure and flow rate based on the steering load, thereby enhancing system efficiency and minimizing energy loss.
3. Effortless Operation: With a power steering torque of ≤ 5 N·m, the steering wheel turns with exceptional ease, allowing for agile maneuverability even under heavy loads or at low speeds.
Working Principle
1. Steering Wheel Rotation: As the steering wheel turns, it drives the rotary spool, thereby opening the oil circuit. Pressurized oil flows through the rotary valve into the metering pump; after being precisely metered in proportion to the steering wheel's angle of rotation, it is directed to either the left or right chamber of the steering hydraulic cylinder, thereby actuating the vehicle's articulated steering.
2. Neutral Position (Steering Wheel Stationary): The valve assembly remains in the neutral position; oil supplied by the pump flows through the priority valve directly back to the oil tank, while both chambers of the steering cylinder remain closed off, maintaining straight-line travel.
3. Load-Sensing Function: The LS port transmits the steering load pressure signal back to the priority valve, ensuring priority allocation of the flow required for steering; any surplus oil is then directed to other working implements, thereby enhancing overall system efficiency.
Advantages
| No. | Performance Advantage | Specific Description |
|---|---|---|
| 1 | Flow Amplification (Core Advantage) | Coaxial flow amplification structure automatically adjusts effective displacement according to steering wheel speed: smooth and precise at low speed, significantly increased flow and faster response at high speed |
| 2 | Light and Easy Operation | Steering torque ≤5 N·m, very light steering wheel effort, greatly reduces driver fatigue |
| 3 | Load Sensing Compatibility | Works with priority valve to provide precise flow only for steering; excess oil is available for other hydraulic functions, reducing energy consumption |
| 4 | Precise and Responsive Steering | Output flow is strictly proportional to steering wheel angle; smooth, reliable and quick response |
Interfacing Relationships
1. Upper End: The internal spline shaft connects to the steering column (the steering wheel drives the steering gear via the steering column).
2. Lower/Side Section: The four main hydraulic ports (P-Inlet, T-Return, A/B-Left/Right Steering, and LS-Load Sensing) connect to the priority valve and the steering hydraulic cylinder via high-pressure hydraulic lines.
DETAILS
| DESCRIPTION | full hydraulic steering control unit | PART NUMBER | BZZ-1000 TLF1-E1000C |
| WEIGHT |
10KG |
VOLUME |
12×12×20 cm |
| TRUCK MOLDE | SHANTUI | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | STEERING |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
Daily Maintenance Suggestions
| Maintenance Item | Maintenance Interval | Specific Content and Recommendations |
|---|---|---|
| Visual Inspection & Leak Check | Daily (before operation) | Check for external oil leaks, loose or damaged hoses; ensure the steering wheel turns smoothly without abnormal noise |
| Hydraulic Oil Level Check | Daily (before operation) | Check the hydraulic oil tank level; top up with recommended hydraulic oil (VG46 anti-wear hydraulic oil) if low |
| Filter / Strainer Check | Every 500 working hours | Inspect hydraulic system filters; replace when pressure difference exceeds 0.3 MPa; clean coarse strainer |
| Hydraulic Oil Replacement | Every 1000–2000 working hours | Replace hydraulic oil and clean the tank; keep oil clean to prevent contaminants from entering the steering system |
| System Air Bleeding | After oil change or maintenance | Turn the steering wheel left and right several times to bleed air from the system |
| Steering Flexibility Check | Daily / per shift | After starting the machine, turn the steering wheel slowly left and right to check for smooth and responsive steering |
| Fastener Check | Every 50–250 working hours | Check steering unit mounting bolts and hose fittings for looseness and tighten as needed |
| Proper Operation Reminder | During daily use | Do not apply excessive force when oil supply is normal; limit manual emergency steering torque to ≤120 N·m when oil supply is insufficient |
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