HF102 320L 4-Cylinder Tire Inflator 12V 150 PSI 400 L/min

How we label data. Confirmed values are read from supplied stock and from the ratings printed on the carton in our own product images; reference values are published marketplace specifications and are shown for identification only; anything not published is withheld rather than guessed. The 400 L/min figure is the maximum output printed on the carton; the 320 L/min designation is the listing class.

A 4 cylinder tire inflator is what you reach for when a single-cylinder pump is simply too slow. Four cylinder heads and a 12V oil-less motor move a large volume of air, so this 150 PSI air compressor lifts a 4×4 or tractor tyre in minutes rather than tens of minutes, and it keeps going when the whole convoy needs airing back up.

Output is quoted the way the factory prints it: 150 PSI maximum pressure and a 400 L/min maximum output on the carton. That combination makes it a genuine 12V heavy duty tire inflator for pickups, off-road vehicles, farm and construction machinery. The listing is also sold as the HF102 320L tire inflator, a 320 L/min class designation, so we quote the carton figures on this page and confirm the exact airflow band for your order in writing.

Because it is built as a tractor tire inflator as much as a passenger-car pump, the unit carries a digital pressure display, thermal and overload protection and a metal body on an anti-vibration base. A long rubber air hose with a screw-on valve connector and an analogue gauge reaches the valve without repositioning the pump, and with the supplied adapters the same unit doubles as a portable air pump for bicycles, balls and inflatables.

In workshop terms this is a 400 L/min air compressor in a carry bag: a fast inflating tire pump for fleets, a 4×4 tire inflator for trail use, and a car air compressor that a tyre shop can hand to a customer without hesitation. With four cylinders and a protective bag it is also the pattern most buyers settle on for farm and quarry equipment, where a slow pump costs real time.

Buyers usually reach HF102-320L through searches such as “portable air compressor for construction”, “best portable tire inflator with gauge”. All of them describe the same task: sourcing a replacement 4-cylinder heavy duty tire inflator for 4×4, SUV, pickup, tractor, farm and construction machinery (12V DC).

Reference / cross-reference numbers are published listings and are shown for identification only; they are not claims of origin or authorization.

• HF102-320L — Listing model and 320 L/min class designation
• WM102-45 — Carton model code printed on our own product images (identification only)
• WM101-45 — Carton model code variant printed on our own product images (identification only)
• 4-cylinder 150 PSI class — Published marketplace specification band for this inflator class
• 400 L/min / 150 PSI — Carton rating for maximum output and maximum pressure
• 50 mm x 4 cylinder class — Voltage class: 12V DC, connected by fused battery alligator clamps — match this against your vehicle before ordering.

• Four finned cylinder heads and an oil-less direct-drive motor for high-volume airflow.
• 150 PSI maximum pressure and a 400 L/min maximum output as printed on the carton.
• Digital pressure display with plus, minus and light keys on the centre panel.
• Thermal and overload protection with automatic recovery after a cool-down.
• Fused battery alligator clamps deliver full current without an accessory-socket fuse.
• Long rubber air hose with screw-on valve connector and a gauge at the tyre end.
• Metal body on an anti-vibration rubber base to stop the pump walking under load.
• Carry bag plus nozzle adapters make it a complete boxed inflator kit.

• Pump runs but airflow is weak, so tyre pressure barely rises.
• Motor overheats or the thermal cut-out trips after only a minute or two.
• Confirmed on our own stock: Model is HF102-320L (4-cylinder tire inflator); carton model code WM102-45.
• Hose or screw-on valve connector leaks air at the valve stem.
• Inline fuse blows as soon as the pump is switched on.
• Uneven airflow that points to one cylinder not pumping.

• 1Airflow for this unit: 400 L/min maximum output (carton rating); listing class 320 L/min — check it against the number stamped on your old part.
• 2Check the inflator is the 12V version before connecting it to a 12V battery.
• 3Gauge for this unit: Analogue pressure gauge on the air hose — check it against the number stamped on your old part.
• 4Screw the hose connector onto the valve stem, check the digital display, then start the pump.
• 5Watch the gauge or display to the target pressure, switch off at 150 PSI or below, then disconnect.
• 6Let the unit cool before storing it in the carry bag, and refit the valve cap.

• Confirmed on our own stock: Protection is Thermal and overload protection with automatic recovery.
• Replacement rubber air hoses and screw-on connectors
• Tyre pressure gauges and digital inflator gauges
• Battery-clamp leads and inline fuse holders
• Nozzle and ball-needle adapter sets
• Airflow: 400 L/min maximum output (carton rating); listing class 320 L/min — match this against your vehicle before ordering.