TISCO Ammeter Gauge 30-0-30 Amp — Direct-Fit 2" Panel Replacement for Vintage Tractors

The TISCO A0NN10670A Ammeter Gauge is a direct-fit 30-0-30 amp replacement instrument designed to restore accurate charging system readouts on vintage tractors and industrial equipment.

This compact, non-luminous ammeter is built to slide into a standard 2-inch panel hole and matches numerous OEM part numbers so you can replace worn or missing gauges without modifying the dash. Manufactured to fit many Allis-Chalmers, Case, Ford, International Harvester and Massey Ferguson models, it brings a familiar dial and needle response back to older electrical systems.

Will this ammeter fit my tractor dashboard?

Yes — the TISCO A0NN10670A is made for a 2-inch diameter mounting hole and covers a long list of original equipment numbers. Check the part numbers and your dash cutout measurement to confirm compatibility before ordering.

• Mounting: designed for 2" panel hole installation
• Compatibility: replaces many OE numbers (see full list in product specs)
• Form factor: standard round gauge with rear-terminals for wiring

How accurate and readable is the gauge in daily use?

The face displays a 30-0-30 amp scale, giving a clear center-zero reference that helps you quickly judge charging vs. discharging. It’s a mechanical/electrical gauge meant to provide straightforward, reliable indications of system current under normal operating conditions.

• Scale: 30 amps positive to 30 amps negative, center-zero
• Visibility: non-luminous dial suitable for daylight and shaded cabins
• Needle response: direct and immediate for routine monitoring

What tractors and equipment list this ammeter as compatible?

This replacement fits a wide range of classic tractors and industrial machines from several manufacturers. Use the compatibility list to cross-reference your existing part number or vehicle model to ensure a match.

• Allis-Chalmers: 170, 190, B, C, D10–D21 series, WC, WD45, WF
• Case: S, SC, SO, VA series
• Ford: 2N, 8N, 9N, 600–900, NAA/Jubilee
• International Harvester & Massey Ferguson: various tractor models including MF35, MF65, 454, 574

What wiring and installation notes should I follow?

Installation is straightforward for anyone familiar with tractor instrument panels. Ensure correct terminal connections and secure mounting; if you’re unsure, consult a service manual or an experienced technician to avoid miswiring the charging circuit.

• Electrical: connect positive/negative and field sensing wires to matching terminals
• Mounting hardware: fits flush into a 2" hole, typically held by the gauge bezel and rear clamp
• Safety tip: disconnect the battery before wiring to prevent shorts

Who this is for: This TISCO ammeter is ideal for owners, restorers and mechanics working on vintage tractors and light industrial equipment that require an accurate 30-0-30 amp panel gauge. It’s particularly useful when replacing missing, damaged or non-functional original gauges while preserving the vehicle’s original look and dash layout. If you need a direct-fit, widely compatible ammeter that matches many OEM part numbers and mounts in a standard 2-inch hole, this gauge provides a practical and economical solution.