148-4644 191-5542 Excavator Swing Motor Assembly for 320C 320D Hydraulic Rotary Motor

148-4644 191-5542 Excavator Swing Motor for 320C 320D

This swing motor is an aftermarket replacement unit for the 320C and 320D excavator slewing circuit, supplied under part numbers 148-4644 and 191-5542. It restores stable swing torque and eliminates slow swing, drift and creeping faults caused by a worn rotary group, scored valve plate or failed swing brake piston.

Product Parameter

Key Features

• One unit covers both 148-4644 and 191-5542 references, simplifying stock for 320C and 320D fleets
• Matched rotary group and valve plate for stable swing torque under load
• Precision lapped friction plates reduce internal leakage and swing drift
• Integrated swing brake releases cleanly, removing creeping on slopes
• Full assembly ready to bolt on, no core modification required
• Each unit bench tested for pressure holding and brake response before packing

Company Profile

Guangzhou Xingfan Precision Oil Pressure Co., Ltd. focuses on aftermarket hydraulic repair and replacement of construction machinery, including excavator, rotary drilling rig, pile driver, concrete mixer, delivery pump truck, crane and harvester. Our range covers hydraulic pump, travel motor, rotary motor, distribution valve, multi-way valve, gear pump, operating handle and walking foot valve.

FAQ

Q1: What is this swing motor?
A: It is an aftermarket hydraulic swing motor manufactured by YFM FK in Guangdong, China, designed for the 320C and 320D excavator slewing circuit and supplied under part numbers 148-4644 and 191-5542.

Q2: How do I confirm compatibility?
A: Send us your machine serial number and the part number stamped on the original motor. We confirm fitment within 24 hours.

Q3: What warranty is provided?
A: 3 months warranty. Every unit is pressure tested and brake tested before shipment.

Q4: What is the price and MOQ?
A: Reference price USD 720 per unit, MOQ 1 unit. Volume discounts are available on request.

Q5: How do I pay and when will it ship?
A: We accept L/C, D/A, D/P, T/T and Western Union. Delivery is about 15-30 days after order confirmation, in export standard packaging.

Q6: Which trade terms and shipping methods do you support?
A: EXW, FOB Guangzhou or Shenzhen, and CIF are standard. Shipments go by sea for full containers, by air or express courier for single units. DDP can be quoted on request.

Q7: What customs documents do you provide for clearance?
A: Commercial invoice, packing list, bill of lading or airway bill, and certificate of origin on request. We confirm the HS code and any import document your broker needs before shipment.

Q8: How are warranty claims handled for overseas buyers?
A: Send photos and a short video of the fault. We diagnose within 24 hours and ship replacement seals, plates or a complete unit with your next order or by express.

Q9: Can you supply spare parts for this swing motor?
A: Yes. Seal kits, friction plates, valve plates, brake pistons and shafts are available separately for workshop rebuilds.