A: Critical signs include hydraulic oil overheating, abnormal metallic whining (cavitation), and visible drops in fan speed. If the excavator throws "high coolant temperature" codes while the main pump is functional, the 291-0061 piston pump is likely failing to maintain the required pilot pressure to drive the cooling system.
Q: What are the technical requirements for a professional installation?
A: Case drain cleanliness is vital. Before installing the 291-0061, you must flush the entire hydraulic cooling circuit to remove debris. It is mandatory to fill the pump case with clean oil through the uppermost drain port before start-up to prevent "dry-run" damage to the piston shoes and swashplate.
Q: How do we confirm the 291-0061 is the correct fit for our specific excavator?
A: Compatibility is verified through the pump’s data plate and the machine’s arrangement number. While the 291-0061 is a standard for many cooling groups, we recommend sharing your equipment serial number. Our engineers will verify the shaft spline count and mounting flange dimensions to ensure 100% procurement accuracy.
Q: How does this hydraulic pump perform in extreme environmental conditions?
A: This pump is built for "High-Stress" environments. Utilizing low-temperature resilient seals and high-thermal-stability internal components, it operates reliably from -30°C to +115°C. This ensures stable cooling performance whether your fleet is operating in sub-zero arctic mining or high-ambient desert construction sites.
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
