Hydraulic Oil Level Gauge YWZ-150 for Sany SY55 SY65 SY75 SY210 SY215 Excavators

Product Overview

This YWZ-150 hydraulic oil level gauge is a precision-matched replacement component for Sany crawler excavator hydraulic tanks, with OEM reference number A250100000174. It functions as a visual monitoring device for hydraulic fluid volume inside the reservoir, supporting daily maintenance and stable operation of the excavator hydraulic system.

Core Functions & Value

Hydraulic fluid level is a critical factor that directly affects the performance and service life of pumps, valves, cylinders and the entire hydraulic circuit. This sight glass enables fast, tool-free level inspection:

• Guards against low-fluid damage: Insufficient hydraulic oil will cause pump cavitation, abnormal operating noise, accelerated wear of precision hydraulic components, and even sudden system failure during heavy duty work.

• Prevents overfill hazards: Excessive hydraulic oil leads to elevated operating temperature, higher internal tank pressure, accelerated seal aging and oil leakage, which reduces system efficiency and shortens component lifespan.

• Clear standard markings: Equipped with H (High) and L (Low) level reference lines, allowing operators to confirm fluid status quickly during pre-shift checks and scheduled maintenance.

Material & Build Quality

Engineered for heavy construction environments, the gauge adopts industrial-grade materials to deliver long-term reliability under tough site conditions:

• Transparent sight tube: Made of oil-resistant engineering polyamide, with good impact resistance and anti-aging properties. It maintains long-term optical clarity when immersed in mineral-based hydraulic fluids.

• Aluminum alloy frame: Provides rigid structural protection for the sight tube, with corrosion resistance and dimensional stability across normal operating temperature ranges.

• NBR sealing elements: Oil-resistant O-rings ensure leak-free mounting. The seal system adapts to working temperatures from -20°C to 100°C, matching typical hydraulic system operating conditions.

• Zinc-plated mounting fasteners: Standard metric thread matching original tank mounting holes, with rust-resistant treatment for long-term outdoor and dusty site use.

Fitment & Installation

Manufactured strictly according to original equipment dimensions, with 150mm center-to-center mounting spacing that fully matches the factory hydraulic tank installation position of corresponding Sany models.

No modification or additional machining is required for installation. It can directly replace damaged, fogged or aged original level gauges to restore normal fluid level monitoring function.

It applies to Sany small and medium-sized crawler excavators including SY55, SY65, SY75, SY135, SY210 and SY215 series, and is compatible with both -8 and -9 generation machines with 150mm mounting specification.

Operating Conditions

Suitable for a wide range of working scenarios including earthmoving projects, mining sites, municipal construction and road works. It maintains stable sealing performance and readable visibility under dusty, high-vibration and temperature-changing working environments.

Usage & Maintenance Note

For accurate level readings, perform inspection with the excavator in the specified posture (boom lowered for machines under 30 tons) after the system is shut down and stabilized. Wipe the outer surface of the sight tube regularly to keep scale marks clear and legible.