HYDRAULIC Vane Pump Repair Services at Ashok Hydraulic Works in Ahmedabad, Gujarat India At Ashok Hydraulic Works , we repair and service hydraulics Vane Pumps, Variable Pumps and all Hydraulic Pumps. Our step-by-step vane pump repair process includes: Inspect the fluid reservoir and detect possible contaminants. Examine and overhaul the vane system. Inspect, test and replace the relief valve where needed. Check and repair the shaft and rotor. Replace any worn mechanical assemblies. Replace the bearing and oil seal every time. Check and repair the pressure and return ports.