Description

Airdog 3406E, C13, C15, C16 2012 Installation Manual

You’ve got an Airdog fuel-prep system sitting in the box for your Caterpillar 3406E, C13, C15, or C16. Good choice. Now you need to install it without guessing on fittings, torque, or routing. That’s where this 32-page factory manual comes in. I’ve seen too many guys skip the safety guidelines in Section 2 and end up with fuel leaks or a dead gerotor. Don’t be that guy. This is the same booklet that comes straight from PureFlow Technologies – not some aftermarket photocopy with blurry diagrams.

Section 2: Installation and Safety Guidelines

Before you touch a wrench, read Section 2. It covers the basic safety rules for working with diesel fuel systems – things like relieving fuel rail pressure before disconnecting lines (Section 10 shows you how). The manual also lists the required tools: standard socket set, T30 Torx bit, and a pressure gauge to verify your regulator setting. Ignoring the safety warnings means risking high-pressure fuel spray. I don’t care how many years you’ve been turning wrenches – follow the factory steps.

Mounting Location Selection (Section 4)

Section 4 walks you through picking the right spot on the truck frame for the AirDog unit. The manual specifies minimum clearance to exhaust components and moving suspension parts. You’ll need a drill with a 3/8-inch bit and the provided mounting bracket. Don’t mount it where the fuel lines will rub against sharp edges – Section 5 covers the actual bracket installation with torque values for the bolts. Page 1 lists the kit number A3SPBT451 – verify that’s what you have before you start.

6B: Removing the ACERT Recycle Fuel Line

If you’re working on a C13 or C15 with the ACERT system, Section 6B is critical. The factory procedure shows exactly which banjo bolt to remove and how to plug the return port on the engine. Aftermarket manuals tell you to “just cap it” – no torque spec, no sealant recommendation. This manual gives you the 18 ft-lb spec for the plug and calls for a copper washer. Skip this step and you’ll have a fuel drip that ruins your injector seals.

Electrical Harness Routing (Section 8)

Section 8 diagrams the entire electrical harness – power, ground, and the oil pressure safety switch. The 4G-HD pump draws high current, so the manual specifies a 12-gauge wire minimum and a 30-amp fuse at the battery. The wiring diagram shows the exact pinout for the microprocessor filter monitor. I’ve traced hot wires to melted connectors on trucks where guys used generic crimp splices instead of the heat-shrink butt connectors the manual calls for. Use the factory wire colors – red for ignition, black for ground.

Filter Service Recommendations (Section 11) and Gerotor Cleaning (Section 12)

Section 11 gives you the maintenance schedule – replace the 6-micron microglass filter every 25,000 miles or when the microprocessor light comes on. Section 12 explains how to disassemble and clean the gerotor assembly without scratching the internal housing. You’ll need a 4mm hex key and a soft-bristle brush. The manual warns against using compressed air on the gerotor – it can spin the rotor and damage the bearings. Follow the cleaning procedure to keep the pump flowing 90 GPH as designed.

Why an OEM Airdog Manual Beats Aftermarket Copies

Aftermarket reprints often omit the CARB approval statement on page 2 and the patent numbers that prove this is a legal emission-control device. This manual is the exact PDF from PureFlow Technologies – includes the test-cell performance data and the Demand Flow system explanation on page 3. If you hit a technical snag, the phone number is right there on page 1: 1-877-463-4373. No generic 800 number that routes to a call center. Related documents you might need: Drogobych Crane КТА-16, КТА-25, КТА-28 2004 Installation Manual, Hyundai Seasall D170 & D150 Installation Manual, and Hella LEDay Flex Installation Manual – 48 Pages of Factory Specs. For background on diesel fuel systems, see Manual Transmission and Manual Transmission (though those are transmission manuals, not fuel – site integration placeholder).

Does this manual cover the C16 engine with ACERT?

Yes – it covers all four Caterpillar models listed: 3406E, C13, C15, and C16. The ACERT recycle fuel line removal is in Section 6B.

What torque spec does it provide for the fuel pressure regulator?

Section 13 gives the regulator adjustment – turn clockwise to increase pressure. The locknut torque is 48 in-lb. No spec for the adjustment screw itself – it’s a spring-loaded seat, not a threaded fitting.

How do I reset the fuel rail pressure after installation?

Section 10 covers resetting fuel rail pressure. On the 3406E you need the Caterpillar ET tool to clear the adaptation values. For C13/C15/C16, the manual says to run the engine at idle for 5 minutes, then cycle the key three times. Page 3 explains why air separation restores correct injection timing – that’s the whole point of the Airdog system.

Is this manual a reprint or a copy?

Original OEM file from PureFlow Technologies – no scanned pages, no missing sections, no third-party watermark. The file name matches the official release: AirDog_3406E-C13-C15-C16_2012_Installation_Manual_en-71532013903.pdf.

If you’re putting an Airdog fuel system on a Caterpillar 3406E, C13, C15, or C16, get the official instructions. I’ve seen too many installations fail because somebody used a generic diagram and guessed the torque. Access the Factory Manual and keep it on your tablet or print it out – the 32 pages will save you a tow truck call.