804047055 radial piston motor for XCMG RP705 paver spare parts

product parameters

- Part Name：Radial Piston Motor
- Part No.：804047055
- Compatible Model：XCMG RP705 medium crawler paver
- Composition：Motor housing, internal cam ring, piston set, roller assembly, valve plate, output spline, full seal kit, drain passage
- Process：Precision casting, quenching, lapping, assembly, high‑pressure bench test
- Built‑in Structure：High‑pressure inlet and outlet, separate drain port, mounting flange, splined output
- Function：Convert hydraulic energy into low‑speed high‑torque mechanical energy to drive feeder or auger for stable material conveying

Applicable Scenarios

Suitable for maintenance and overhaul of scraper feeder and auger hydraulic drive on XCMG RP705 crawler paver; replacement of failed original radial piston motors; spare parts for municipal and highway asphalt paving projects; low‑speed high‑torque hydraulic motors stocked by construction parts suppliers.

▪ Strong low‑speed torque: High starting torque and smooth rotation at low speed to avoid hunting and maintain even feeding.
▪ Compensated end‑face porting: Automatic wear compensation keeps volumetric efficiency stable and slows internal leakage growth.
▪ Heavy‑duty wear‑resistant construction: Reinforced cam ring and rollers absorb impact loads caused by material jamming.
▪ Reliable sealing system: Special heat‑resistant oil seals reduce shaft leakage under hot hydraulic oil conditions.
▪ OEM mounting datum: Flange, spline and port layout match original design for excellent interchangeability.
▪ Bench tested before shipment: Every motor passes pressure, speed and leakage inspection for consistent performance.

FAQ

Q: Can this radial piston motor replace an ordinary orbital motor directly?
A: No. They differ in torque characteristic, mounting flange and flow requirement and are not interchangeable. Use the correct part number.

Q: Must the whole assembly be replaced if the motor seeps slightly?
A: If only the outer seal leaks while power and sound remain normal, replace the seal kit first. Replace the full unit once power drops, internal noise appears or leakage rises sharply.

Q: What should be noted during installation?
A: Flush hydraulic lines before fitting, lubricate splines, tighten flange bolts diagonally, connect the drain line properly, and run a no‑load test to check for leaks and abnormal sound.

Q: What causes most radial piston motor failures?
A: Contaminated hydraulic fluid scoring the cam and valve plate, sustained overload from jamming, seal degradation by high oil temperature and blocked drain lines raising case pressure.

Q: How to extend motor service life?
A: Replace hydraulic oil and filters on schedule, avoid running under jammed overload, inspect drain lines and shaft seals regularly, and stop operation for service at the first sign of unstable feeding.