Name: Excavator Hydraulic Swing Motor KMF31 KMF41 Swing Motor PC30HM PC40HM PC45HM PC50HM PC60-7HM Swing Motor Repair Kit
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: KMF41
Availability: InStock

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Excavator Hydraulic Swing Motor KMF31 KMF41 Swing Motor PC30HM PC40HM PC45HM PC50HM PC60-7HM Swing Motor Repair Kit

Excavator hydraulic swing motor KMF31

Excavator swing motor repair kit

PC60-7HM swing motor replacement

Place of Origin:

China

Model Number:

KMF41

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Product Details

Packing:

Wooden Box

Highlight:

Excavator hydraulic swing motor KMF31

Excavator swing motor repair kit

PC60-7HM swing motor replacement

Payment & Shipping Terms

Minimum Order Quantity

1 Pc

Packaging Details

Carton

Delivery Time

7-15days

Payment Terms

T/T

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+8615294125097

guangqi334@gmail.com

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Product Description

Excavator Hydraulic Swing Motor KMF31 KMF41 Swing Motor PC30HM PC40HM PC45HM PC50HM PC60-7HM Swing Motor Repair Kit

Function

Serving as the power actuator for excavator slewing movement, the hydraulic swing motor receives pressurized hydraulic fluid delivered by the main pump, transforming hydraulic power into rotational mechanical power. It cooperates with the swing reduction gearbox to drive the machine upper body to rotate bidirectionally around the central pivot, supporting flexible positioning, soil dumping and stacking construction operations.

Structure

Key internal parts cover rotating assemblies (plungers, cylinder barrel, port plate, pressure plate and slipper assemblies), spring-loaded parking brake unit, anti-drift balancing valve, pressure limiting overflow valve and charge check valve subassemblies. Matched planetary swing reducer realizes torque amplification and speed reduction, outputting large driving torque to withstand heavy eccentric loads during slewing work. The built-in wet brake structure automatically engages locking state once hydraulic control pressure disappears.

Working Principle

Operating the swing pilot handle outputs pilot pressure oil to disengage the parking brake mechanism. Alternating high-pressure oil supply to two motor service ports pushes plungers to do linear reciprocating motion inside cylinder barrel; the port plate completes continuous oil distribution between inlet and outlet chambers to drive rotary group and output shaft rotation. The anti-rebound balancing valve counteracts back pressure formed by rotational inertia, eliminating upper body reverse swing phenomenon after operation stop. Pressure limiting overflow valve prevents overpressure impact damage, while charge check valve replenishes low-pressure oil to eliminate internal vacuum cavitation risk.

Common Failures

Clearance enlargement from plunger and cylinder barrel wear, port plate surface scratch or slipper ablation induces heavy internal leakage, presenting symptoms of insufficient slewing power, sluggish rotation and slow stop response. Fatigued brake springs, worn friction plates or seized brake valve spools cause incomplete brake disengagement, manifested as stiff rotation, rotational shaking or parking slip failure. Malfunctioned anti-drift valve leads to noticeable backward rotation after swing stop. Serious internal leakage converts pressure loss into thermal energy, triggering abnormal hydraulic oil overheating; damaged bearings or metal impurities inside the motor generate abnormal impact noise during operation. Aging outer sealing rings result in external oil seepage.

Maintenance

Conduct regular visual inspection on motor shell, sealing positions and tubing connections for hydraulic leakage. Follow schedule to renew hydraulic oil and filter cartridges to stop abrasive wear of precision internal mating parts. Routinely measure brake gap and friction plate wear degree, implement timely replacement for over-threshold brake components. Keep drain line unblocked to prevent excessive internal casing pressure. Periodically test working performance of charge valve and overflow valve, disassemble and clean stuck valve spools to maintain steady slewing smoothness and dependable braking effect.

Machinery Test Report	Provided	Warranty	3 Months
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Product Name	Swing Motor
Model	KMF41	MOQ	1 Piece
Quality	High-Quality	Delivery time	7-15 Days
Standard or Nonstandard	Standard	Application	Excavator Machinery
Size	Standard Size	Packing	Wooden Box

Excavator Hydraulic Swing Motor KMF31 KMF41 Swing Motor PC30HM PC40HM PC45HM PC50HM PC60-7HM Swing Motor Repair Kit 0 Company Profile

Tags：

Excavator Hydraulic Swing Motor KMF31 KMF41 Swing Motor PC30HM PC40HM PC45HM PC50HM PC60-7HM Swing Motor Repair Kit

Excavator hydraulic swing motor KMF31

Excavator swing motor repair kit

PC60-7HM swing motor replacement

Excavator hydraulic swing motor KMF31

Excavator swing motor repair kit

PC60-7HM swing motor replacement

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Swing Motor M2X Series M2X63 M2X96 M2X120 M5X M5X130 M5X180 Spare Parts Slewing Motor for Excavator Parts

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