Air Pressure Manometer Gauge 500°F YY242-2L for Forklift Brake & Hydraulic Systems

The YY242-2L air pressure manometer gauge is a dual-scale analog instrument designed for monitoring pneumatic and hydraulic system pressure on forklift brake circuits, transmission control lines, and auxiliary air systems. With a maximum reading of 500°F (260°C) on the temperature scale and a pressure range calibrated for standard pneumatic circuits, this gauge provides real-time visual indication of system pressure — allowing operators and maintenance technicians to verify accumulator pre-charge pressure, brake booster air supply, and transmission clutch engagement pressure at a glance. When the gauge needle drops below the normal operating range during equipment operation, it signals a developing leak, compressor failure, or regulator malfunction before the system degrades to the point of component damage.

Built with a brass Bourdon tube sensing element and a precision gear-driven pointer mechanism, this manometer gauge delivers accurate readings without requiring external power or electronic signal conditioning — a critical advantage in the vibration-prone environment of counterbalance forklifts where electronic sensors frequently fail. The zinc-plated steel case with a glass lens window protects the internal mechanism from dust, moisture, and impact, while the rear 1/8-inch NPT threaded connection provides a secure, leak-free installation into standard gauge ports. Compatible with OEM part numbers 860110891 and 803502457, this gauge fits Linde, HELI, and Hangcha pneumatic gauge panels without adapter fittings.

Suitable for air brake systems on larger-capacity forklifts, pneumatic clutch assist circuits, and compressed air accumulator monitoring. The dual-display face includes both pressure (psi/bar) and temperature (°F/°C) scales, making it a versatile diagnostic instrument for workshop air system testing as well as permanent dashboard installations. For complete forklift instrumentation including hour meters, fuel gauges, and temperature senders, browse our forklift meter and gauge category.

Technical Specifications

• OEM / Part Number: 860110891, 803502457, YY242-2L
• Type: Analog Bourdon tube manometer (pressure gauge)
• Display: Dual-scale — Pressure (psi/bar) + Temperature (°F/°C)
• Pressure Range: Calibrated for pneumatic circuits
• Temperature Range: Up to 500°F (260°C)
• Sensing Element: Brass Bourdon tube, gear-driven pointer
• Case Material: Zinc-plated steel with glass lens
• Connection: Rear 1/8-inch NPT threaded port
• Face Diameter: Standard 52mm (2-inch) panel mount
• Application: Forklift air brake, pneumatic clutch, accumulator pressure monitoring

Compatible Forklift Brands

Each pressure gauge ships with a protective plastic thread cap on the NPT port. Before installation, wrap the gauge threads with 2-3 turns of PTFE tape or apply liquid thread sealant — do not overtighten the gauge body with a wrench as this can crack the Bourdon tube housing. If the gauge needle oscillates rapidly during operation, install a snubber or restrictor fitting in the gauge port to dampen pressure pulsations. For pressure system troubleshooting guides, consult Baldwin Filters. Kingstream stocks the YY242-2L pressure gauge for same-day dispatch — worldwide shipping with online tracking.