How to Use and Maintain Tianshu CA Series Hydraulic Motor which is 100% alternative to Hagglunds

TianShu CA series hydraulic motors are 100% replacements for high-quality Hagglunds hydraulic motors manufactured in Sweden, widely used in engineering machinery, shipbuilding, metallurgy, mining, and other fields. Their use and maintenance must follow professional standards to ensure equipment reliability and extend service life. The following are key operating guidelines:

I. Preparation Before Use

Model Selection Confirmation

Select the appropriate model based on the working conditions (load, speed, torque, media type), and verify the flow rate, pressure, and speed parameters.

Check the Tianshu CA motor 100% alternative to Hagglunds hydaulic motor serial number to ensure it matches the equipment manual.

Installation Requirements

Concentricity: The shaft and load shaft must be strictly concentric, with a permissible radial deviation ≤0.1mm and axial deviation ≤0.2mm.

Fixing: Use high-strength bolts to avoid loosening due to vibration.

Leakage Check: Before installation, confirm that the oil ports are not blocked and the seals are intact.

Oil Requirements

Recommended: Use ISO VG 4668 anti-wear hydraulic oil, viscosity range 15100cSt (40℃). Filtration accuracy ≤10μm, moisture content <0.1%, avoid impurities.

II. Operating Procedures

Pre-start Inspection

Manually rotate the Tianshu CA motor 100% alternative to Hagglunds hydaulic moto to confirm there is no jamming, abnormal noise, or abnormal resistance.

Check the oil level and quality in the tank to ensure the system is clean.

Operation Control

Start-up: Slowly open the inlet valve to avoid sudden high-pressure impact (it is recommended to start under no-load and then load).

Speed Adjustment: Control the speed through a variable pump or throttle valve; overspeeding is prohibited (refer to the nameplate for maximum speed).

Load Matching: Avoid prolonged low-speed heavy loads to prevent excessively high oil temperature (continuous operation oil temperature ≤80℃).

Special Operating Conditions

Forward/Reverse Switching: Must be performed after shutdown; reversing under load is prohibited.

Braking Requirements: If an emergency stop is required, depressurize first before operation to prevent hydraulic shock.

III. Daily Maintenance

Regular Inspection

Oil Analysis: Test oil contamination level (NAS 1638 ≤ 9 level) every 500 working hours. Leakage Troubleshooting: Focus on checking the shaft seal and inlet/outlet oil connectors. Replace O-rings or other seals immediately if leaks are found.

Temperature Monitoring: Use an infrared thermometer to monitor the casing temperature during operation. If it exceeds 90℃, stop the machine for inspection.

Cleaning and Maintenance:

Clean the oil tank and oil filter regularly, and replace the filter element (recommended for the first 500 hours, then every 2000 hours).

In rainy seasons or humid environments, check the Tianshu CA motor 100% alternative to Hagglunds hydaulic motor junction box for sealing to prevent moisture absorption.

IV. Common Faults and Repairs

Abnormal Noise/Vibration

Causes: Insufficient oil, air ingress, bearing wear, poor gear meshing.

Solutions: Add oil and bleed air (execute the system bleed procedure), replace worn bearings (SKF imported bearings recommended), check the clearance between the distributor plate and cylinder block (normal ≤0.15mm).

Speed Reduction

Causes: Excessive leakage (internal or external leakage), insufficient displacement, stuck safety valve.

Solutions:

Measure the inlet/outlet pressure difference. If ΔP > 10 bar, replace the seals or repair the variable displacement mechanism.

After disassembly, adjust the displacement control lever using a special tool, and replace the valve core if necessary. Oil Temperature Too High

Causes: Oil viscosity mismatch, cooling system failure, excessive load.

Solution: Replace with oil of suitable viscosity, clean the cooler (finned type), and check the cooling fan motor 100% alternative to Hagglunds hydaulic motor (YVP inverter motor  100% alternative to Hagglunds hydaulic motor recommended). Shaft Seal Leakage

Solution**:

Replace the double-lip skeleton oil seal (refer to the manual for model; FKM material is recommended for high pressure resistance).

Apply a small amount of clean hydraulic oil during installation to avoid dry friction. Abnormal Noise/Vibration

Causes: Insufficient oil, air ingress, bearing wear, poor gear meshing.

Solution: Add oil and bleed air (execute the system bleed procedure), replace worn bearings (SKF imported bearings recommended), and check the clearance between the distributor plate and cylinder block (normal ≤0.15mm). Abnormal Noise/Vibration

Causes: Insufficient oil, air ingress, bearing wear, poor gear meshing.

**Troubleshooting:** Add oil and bleed air (execute the system bleed procedure), replace worn bearings (SKF imported bearings recommended), check the clearance between the distributor plate and cylinder block (normal ≤0.15mm).

**Speed Drop**

Causes: Excessive leakage (internal or external), insufficient displacement, stuck safety valve.

Troubleshooting:

Measure the inlet and outlet pressure difference. If ΔP > 10 bar, replace the seals or repair the variable displacement mechanism.

After disassembly, adjust the displacement control lever with a special tool; replace the valve core if necessary.

**Speed Drop**

Causes: Excessive leakage (internal or external), insufficient displacement, stuck safety valve.

Troubleshooting:

Measure the inlet and outlet pressure difference. If ΔP > 10 bar, replace the seals or repair the variable displacement mechanism.

After disassembly, adjust the displacement control lever with a special tool; replace the valve core if necessary.

**High Oil Temperature**

Causes: Oil viscosity mismatch, cooling system failure, excessive load.

Troubleshooting: Replace with oil of suitable viscosity, clean the cooler (finned type), and check the cooling fan motor  100% alternative to Hagglunds hydaulic motor (YVP inverter motor  100% alternative to Hagglunds hydaulic motor recommended). Oil Temperature Too High

Causes: Oil viscosity mismatch, cooling system failure, excessive load.

Troubleshooting: Replace with oil of suitable viscosity, clean the cooler (finned type), and check the cooling fan motor  100% alternative to Hagglunds hydaulic motor (YVP inverter motor  100% alternative to Hagglunds hydaulic motor recommended).

Shaft Seal Leakage

Solution:

Replace with a double-lip skeleton oil seal (refer to the manual for model; FKM material is recommended for high pressure resistance).

Apply a small amount of clean hydraulic oil during installation to avoid dry friction. Shaft Seal Leakage

Solution:

Replace with a double-lip skeleton oil seal (refer to the manual for model; FKM material is recommended for high pressure resistance).

Apply a small amount of clean hydraulic oil during installation to avoid dry friction.

V. Disassembly and Assembly Precautions

Disassembly Steps

Empty the system pressure. Mark the relative positions of parts before disassembly (e.g., cylinder block and distributor plate).

Use a special puller to disassemble the output shaft; do not use a hammer. Core Component Inspection

Distributor Plate: Visually inspect the surface for scratches (≤0.05mm depth). It can be repaired with a precision oilstone.

Plunger and Cylinder Block: Measure the clearance between the plunger and cylinder bore with a dial indicator (standard ≤0.03mm). If the clearance is outside this range, the entire set must be replaced.

Assembly Accuracy

Assembly torque should be performed according to the manual (e.g., cylinder block bolt torque 120±5N·m).

The variable displacement mechanism adjusting rod must be coated with high-temperature resistant sealant (e.g., Dow Corning 734).

VI. Safety Standards

The main power supply must be disconnected before maintenance, and a "Do Not Start" warning sign must be displayed.

Use a torque wrench (accuracy ±3%) to tighten bolts, avoiding overtightening which could deform the housing.

Hydraulic System Pressure Holding Test: After maintenance, perform a pressure holding test at 35MPa for 30 minutes. A pressure drop ≤0.5MPa is considered合格 (qualified).

VII. Spare Parts Procurement Recommendations

TianShu Hydraulics is 1:1 compatible with Hagglunds original CA series hydraulic motors.