Description

Agri-fab 45-0346 2007 User Manual – Factory Specifications for 40″ Spike Aerator

You got a 2007 Agri-fab 45-0346 40-inch spike aerator sitting in the garage, and the paper manual is either missing or soaked in gas. I’ve had guys try to assemble these things using memory and a YouTube video. That ends with a bent axle and a call to the parts line. This Agri-fab 45-0346 2007 User Manual is the factory document – 20 pages of what you actually need. No generic aftermarket translation where the bolt sizes don’t match. The pages show you exactly which hardware goes where, with part numbers you can verify before you start turning wrenches.

Assembly Sequence and Hardware Identification

Page 2 of the manual lays out the carton contents: tray, axle, 12 spike disks, end plates, axle support bracket, hitch arm mount brackets, lift handle, wheels, wheel mount bracket, hitch brackets, and two hitch arms. That’s the big picture. Then page 3 gives you the hardware pack – shoulder bolts, hex bolts, carriage bolts, nylock nuts, flat washers, cotter pins. Each one has a key letter (A through Q) and a quantity. If you’re missing a 5/16″ x 1″ hex bolt (key D, quantity 23), you’ll know it before you’re halfway through assembly. The manual doesn’t assume you know which spacer is long versus short – it calls them out. L is long, N is short. That level of detail keeps you from forcing the wrong part and stripping threads.

I’ve seen these aerators put together with grade-2 hardware from the bin. Bad idea. The factory calls for nylock nuts on most fasteners (key F and G). Those lock nuts are there because vibration from the spikes will shake loose anything else. The manual shows the exact fastener for each joint. Follow it. Don’t substitute.

Does This Manual Cover Torque Specs?

No torque table in this particular Agri-fab manual. That’s not unusual for a lawn attachment user manual – the critical spec here is part orientation and sequence. What you do get is a clear diagram of where each bolt goes. For the 5/16″ nylock nuts, hand-tighten then a quarter-turn past snug with a 1/2″ wrench is standard practice. If you’re the type who needs a number, call Agri-fab discount parts at 606-678-9623. But the manual gives you the assembly steps that prevent you from installing the axle bracket backwards, which would make the aerator drag instead of roll. That’s more valuable than a torque value you’d ignore anyway.

40″ Spike Aerator: What You Get in the Box

Before you open the carton, flip to pages 2-3. The manual lists every piece: tray, axle, 12 spike disks, end plates, axle support bracket, three hitch arm mount brackets, lift handle, two wheels, wheel mount bracket, two hitch brackets, two hitch arms. Plus the hardware bag – 23 hex bolts 5/16″ x 1″, 31 nylock nuts 5/16″, 10 flat washers with 6 extra, etc. The spike disks themselves have a hub (key L) that presses onto the axle. If you miss that the spacer goes between the disk and the end plate, the whole thing wobbles. The manual shows the stack-up order. Spend five minutes reading it, save an hour of backing out bolts.

Related manuals you might need: Agri-fab 502492 2007 User Manual – Factory OEM Guide covers a different model but uses similar hardware. Also check Agri-Fab 45-03451 2007 User Manual if you have the 45-03451 variant – the spike count differs. For a 30″ lawn sweeper, see Agri-Fab 45-03371 30″ Lawnsweeper User Manual.

3 Safety Rules That Actually Matter

Page 4 of the manual prints the safety rules in bold. Rule 1: read the entire owners manual before assembly. Rule 4: the aerator has sharp points – wear substantial footwear. Rule 7: always start with the transmission in first (low) gear when towing. That last one is critical. If you drop a Manual Transmission vehicle into high gear while pulling this aerator on a slope, you lose control. The aerator adds drag and changes the vehicle’s stability. The manual warns about reduced braking on slopes. Listen to it.

Another external source worth checking: Manual Transmission operation basics – the same principles apply when matching ground speed to implement load. Don’t let kids operate this thing. The manual says it, and it’s not optional.

Verify Your Parts Before You Start

Lay out everything from the carton. Match each piece to the illustration on page 2. Tray, axle, 12 spike disks – count them. The hardware pack has a key for each fastener. If you’re short a cotter pin (key K) or have an extra flat washer, that’s fine – there are six extras. But if you’re missing a nylock nut, don’t use a regular nut. The manual calls out key G (31 nylock nuts 5/16″) for a reason. Regular nuts will back off under vibration. The spike disks will rattle loose and you’ll be chasing parts across the yard. The factory manual is your checklist. Use it.

Frequently Asked Questions

Can I use this manual for the Agri-fab 45-03451 model?

No. The 45-03451 has a different spike configuration and uses a different hitch bracket set. This manual is for 45-0346 only.

The safety rules say to read the vehicle manual – why does that matter for an aerator?

Because the aerator changes the vehicle’s center of gravity and adds rolling resistance. If your tractor’s manual says to engage the differential lock on slopes, you need to know that before you hook up the aerator. The aerator’s spike disks dig into turf, which can cause sudden deceleration. If you’re in too high a gear, the vehicle might stall or lurch. The vehicle manual will have specific towing capacities and transmission guidelines that directly affect safe operation of this attachment. Ignoring that combination is how people roll equipment down hills. The Agri-fab manual is telling you to cross-reference – smart move.

This factory manual is the only document you should trust for assembling and operating the 2007 Agri-fab 45-0346 40″ spike aerator. It’s 20 pages of specific part numbers, assembly order, and safety warnings that keep your equipment working and you out of the emergency room. Access the Factory Manual right now – print it, put it in a plastic sleeve, and keep it with the aerator. You’ll thank yourself the first time you need to replace a spike disk.