EC160B or EC180B hydraulic system losing pressure progressively? The 14514893 main pump rotating group wear causes the Volvo-specific load-sensing circuit to hunt because the pump can no longer build pressure fast enough to satisfy the LS signal demand. RITO's heavy-duty pump assembly restores the fast pressure response that the EC160B/EC180B LS system requires.
Item NO.:
14514893-OTOrder(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time:
In Stock14514893 Hydraulic Main Pump Assembly for Volvo EC160B and EC180B excavators. The Volvo LS (load-sensing) hydraulic system requires the pump to respond rapidly to varying load demands. A worn pump barrel and valve plate slows this response, causing the LS differential to collapse and actuator speed to vary uncontrollably. This pump assembly restores the volumetric efficiency needed for accurate LS control.

| Part Number | 14514893 |
|---|---|
| Part Name | Hydraulic Main Pump Assembly |
| Compatible Brand | Volvo |
| Applicable Models | EC160B, EC180B Excavator |
| Application | Main variable axial piston pump for Volvo EC160B / EC180B LS hydraulic system |
| Material | Precision alloy steel rotating group and pump housing |
| Product Color | Industrial finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Provides fast-response variable displacement flow to satisfy the EC160B / EC180B load-sensing control system |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |

New rotating group provides low internal leakage so the pump builds standby pressure quickly, maintaining the correct LS differential for stable actuator speed control.

Pump regulator spring and spool settings matched to Volvo EC160B / EC180B LS differential specification, preventing the standby pressure hunting that occurs with non-Volvo-spec regulators.

Both front and rear pump sections restored simultaneously, eliminating the flow imbalance between sections that causes asymmetric actuator behaviour.

SAE port sizes and engine flange bolt circle confirmed for EC160B and EC180B for direct installation without adaptor blocks or port converters.

FAQ
Q: What happens to an EC160B when the 14514893 pump is worn?
A: The load-sensing LS differential collapses as pump bypass grows. Actuators speed up when lightly loaded and stall under heavy load. The system hunts noticeably and hydraulic oil temperature rises above normal operating range.
Q: Should I also check the LS main control valve when replacing 14514893?
A: Yes. If the pump has been severely worn, contaminated hydraulic oil may have scored the LS main valve spools. Test LS differential pressure after fitting the new pump; if it still hunts, inspect the LS shuttle valves and main valve orifices.
Q: What hydraulic oil is correct for the EC160B / EC180B with a new 14514893 pump?
A: Volvo specifies an anti-wear hydraulic oil with zinc-free additives for some LS systems. Check the EC160B / EC180B operator manual for the exact oil specification before filling.
Q: How to confirm 14514893 is the correct pump for my EC160B or EC180B?
A: Match the pump model plate reading 14514893 and confirm the machine model is EC160B or EC180B. Provide the Volvo serial number to our team for cross-reference.
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
Leave A Message
Scan to wechat :