A: It fixes slow hydraulic response, extreme boom drop under heavy load, high oil temperature alerts, and engine stalling during excavation.
A: Technicians must change all hydraulic filters, flush old oil completely, and pre-fill the pump case with fresh fluid before startup.
A: Ensure your machine matches model 320, 323, 320GC, or 323GC, and check that the pump tag says 531-9886.
A: Built with highly durable internal components, it sustains smooth piston strokes and precise flow regulation under intense heat and heavy continuous vibrations.
Q: What quality options are available?
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies





















