Description

Ammann AV23-2, AV26-2, AV32-2, AV33-2, AV40-2 2008 Service Manual

You’ve got a AV26-2 or AV40-2 sitting in the yard with a hydraulic leak or a no-start condition. The aftermarket manual you printed off the internet shows a torque value for the drive motor flange that’s wrong by 15 ft-lbs – I’ve seen it. That’s why you need the original factory Ammann AV23-2, AV26-2, AV32-2, AV33-2, AV40-2 2008 Service Manual. 174 pages of the same documentation Ammann dealers use. No guesswork, no photocopied diagrams that look like a fax from 1995.

174 Pages of Factory Procedures for the AV23-2 to AV40-2

Flip through this manual and you’ll find every system broken down: engine, hydrostatic drive, vibratory assembly, electrical, brakes, and frame. The manual covers the AV23-2, AV26-2, AV32-2, AV33-2, and AV40-2 standard models plus the K variants (AV23-2K through AV40-2K). Ammann built these rollers with Yanmar diesel engines, and the manual includes the specific maintenance intervals for that powerplant. You get exploded views, part numbers, and the sequences for disassembly and reassembly. That’s what separates a factory service manual from a reprint – the order of operations matters when you’re pulling a vibratory shaft.

That’s the difference between a repair that holds and one that fails.

What Torque Values and Fluid Capacities Are Listed?

Torque is where most diy guys get burned. This manual lists the exact torque for every bolted joint: wheel lugs, hydraulic fittings, engine mounts, pump flanges, and the vibratory weight housing. It also gives you the fluid capacities for the hydraulic tank, engine oil, gearbox, and cooling system – all in imperial units. For example, the vibratory bearing preload torque is specified; if you overtighten you’ll crush the bearing cage. The manual warns you about that with a specific note in the procedure. I’ve seen a guy ruin a $1,200 vibrator assembly because he used a generic chart from an online forum. The factory manual has the correct values – you can trust the numbers because they came from the same engineers who designed the roller. That’s the difference between a repair that holds and one that fails.

3 Reasons to Trust OEM Documentation Over Aftermarket Reprints

First, the wiring diagrams in aftermarket books often use a different color code or omit optional equipment. This manual has the Ammann factory schematics for the specific serial number range 20’000-22’499. Second, the torque specs come from Ammann’s engineering department, not a typist copying from a blurry scan. Third, the diagnostic procedures tell you what to check in order – like test the pressure relief valve before pulling the pump. That logic is missing in most third-party books. Pair this with the Ammann AV23-2 AV26-2 AV23-25 2008 Parts Catalog – Section: Intervallberiese for an exact parts breakdown.

Engine and Hydraulic Systems: What the Manual Covers

The Yanmar engine section alone is worth the price. It covers fuel system bleeding, injection pump timing, valve adjustment, and cooling system service. For the hydraulic system, you get the charge pressure test procedure, pump removal and installation, and the hydrostatic drive troubleshooting chart. The manual also includes the vibratory system – eccentric weight adjustment, bearing replacement, and belt tensions. If you need to rebuild the drive motor, the manual walks you through the seal replacement with the correct O-ring part numbers. Don’t skip the Declaration of Conformity section at the front – it lists the sound power levels and EC directives, which can matter for compliance.

Get the Right Repair Data for Your Tandem Roller

Before you pull a wrench, check the serial number on your machine. The manual is valid for serial numbers 20’000-22’499. That covers a specific production range of the AV23-2, AV26-2, AV32-2, AV33-2, AV40-2 and their K variants. If your machine falls outside that range, you may need the later revision (2009). For that, see the AMMANN AV33-2 AV40-2 AV26-2 2009 Parts Catalog. The manual also references the Ammann AV23-2 to AV40-2 2008 Service Manual – OEM Factory Data – that’s this document, so you’re in the right place.

If you’re unfamiliar with the basics of a manual transmission in construction equipment, refer to Manual Transmission for general theory.

The gearbox section of this manual assumes you know how a manual transmission works; brush up on Manual Transmission if needed.

Frequently Asked Questions

Does the manual cover the AV23-2K and AV26-2K models?

Yes.

What serial numbers does this manual apply to?

Serial range 20’000-22’499.

Is this manual in English?

The manual is primarily in English with some sections (like the Declaration of Conformity) in both English and German. The procedures and specs are all in English.

How do I ensure this is the correct manual for my roller?

First, locate the serial number plate on your machine. The manual covers AV23-2, AV26-2, AV32-2, AV33-2, AV40-2 with serial numbers 20’000 through 22’499. If your series number starts with a different range (e.g., 22’500+), you need the next revision. Also verify the ID number on the manual cover: 1-521952. The manual also covers the K variants (e.g., AV23-2K). If your machine has a different engine or special options, cross-reference the table of contents. Ammann released this 2008 edition for this specific production batch, and it includes the Declaration of Conformity with the noise and emission data relevant to your machine. If you are still unsure, compare the booklet with the OEM part number on Ammann’s website or contact a dealer. This manual is the exact same PDF that Ammann Schweiz AG distributed to their service network in July 2008.

Stop wasting time with sketchy online copies. Access the Factory Manual and get the real Ammann data on your screen or printed out. It’s a PDF, so you can put it on a tablet in the shop and zoom into the torque charts. That’s the right way to work.