Description

Terexlift C41A, C42A, AMPAC-4 Parts Catalog – OEM Factory Reference

You have a Terexlift AMPAC-4 pneumatic compactor on your lot, and you need a part. Not the whole assembly – just that one bearing, or that valve stem, or that steering cylinder seal. You pull up a generic parts site, type in the model, and get a list of aftermarket numbers that may or may not match. Then you order it, wait three days, and find out the bolt pattern is off by three millimeters. I’ve seen it happen. That’s why I keep an original OEM parts catalog on the shelf. For the Terexlift C41A, C42A, AMPAC-4 Parts Catalog, you get 49 pages of factory-indexed part numbers, exploded drawings, and the exact nomenclature Rex Chainbelt used when they built these machines. No guesswork, no returns. Just the right piece.

What This Parts Catalog Actually Covers

This is a genuine Rex Chainbelt construction machinery division parts manual, later badged as Terexlift. It covers the AMPAC-4 pneumatic compactor in both the C41A and C42A configurations. The book is 49 pages long, and every page is a parts breakdown. You get exploded views of the drum drive, steering column, hydraulic tank, pneumatic system, and all the brackets and fasteners. Each part has a reference number that ties directly to the model number on the machine nameplate. If you have a C42A serial number, you can cross-check against the page for that variant. I’ve used these catalogs to track down obsolete parts that aftermarket listings said didn’t exist. They existed – the aftermarket just didn’t have the right grouping.

49 Pages – Not a Service Manual, But You Need It Anyway

Let me be clear: this is a Parts Catalog, not a repair manual. It won’t tell you how to rebuild the hydraulic pump or what torque to put on the steering arm bolts. What it will do is tell you exactly which hydraulic pump part number fits your AMPAC-4, and where to order it. For the guy who works on these compactors, that’s half the battle. I’ve had jobs stall for hours because a tech ordered a ‘compatible’ replacement that didn’t fit. With the OEM parts catalog in hand, you look up the page, grab the number, and call your dealer. Done. You can find the steering section around page 22, the pneumatic control valve group on page 31 – but I’m not going to list every page here. You need the whole thing.

Three Systems You Can Identify with This Catalog

1. Pneumatic control system – all air lines, regulators, and inflation valves for the AMPAC-4 tires.
2. Steering and articulation – steering cylinder, pivot bearings, tie rods.
3. Drum drive and planetary reduction – final drive gears, seals, and bearing sets.

Each system is broken down into sub-assemblies with a parts list that includes the manufacturer’s part number. If you need a wheel assembly for the C41A, you’ll find it grouped with the tire data. No aftermarket cross-reference needed.

Why OEM Factory Specs Matter – Even for Parts

Aftermarket parts catalogs often merge multiple model years into one generic drawing. They show a part that ‘fits’ but might require modification. This manual was printed by the same company that assembled the machine. The drawings match the actual production layout. If the original manual says part number 412-xxx is a 5/8-inch Grade 8 bolt, that’s what you buy. I’ve seen shops lose a compactor wheel because they used a standard bolt instead of the flanged shoulder bolt the factory specified. The OEM catalog keeps you from making that mistake. For a Terexlift C41A or C42A, you want the same source the factory used when they built it. That’s this 49-page PDF.

Common Pitfalls When Ordering Parts for the AMPAC-4

First pitfall: assuming the C41A and C42A use identical parts. They share a lot, but the C42A has a different wheelbase and some steering components differ. The catalog separates those groups clearly. Second pitfall: buying a ‘universal’ pneumatic tire valve that doesn’t seal in the AMPAC-4 rim. The factory part number is specified on page 18 (roughly) – just look for the tire and wheel section. Third pitfall: ignoring the serial number break. Terexlift changed parts mid-production. This catalog includes the serial number ranges. If you skip that, you risk ordering a part from the wrong run. Aftermarket websites don’t show serial number breaks. This manual does.

Does This Manual Cover the Fuel System?

Short answer: no. The AMPAC-4 is a pneumatic compactor, not a self-propelled vehicle with an engine. There is no fuel system. The catalog covers the hydraulic system, pneumatic system, steering, drum drive, and frame components. If you need engine parts, you’re looking at a different machine.

Related Manuals You Might Need

• 1972 Terexlift S.P. VIBRATORY ROLLER Parts Catalog – OEM Factory Reference”>1972 Terexlift S.P. VIBRATORY ROLLER Parts Catalog – OEM Factory Reference
• Terexlift SP950 1977 Parts Catalog – OEM Factory Reference”>Terexlift SP950 1977 Parts Catalog – OEM Factory Reference
• Terexlift SP848, SP900 1973 Parts Catalog – OEM Factory Reference”>Terexlift SP848, SP900 1973 Parts Catalog – OEM Factory Reference

For a broader look at construction equipment documentation, you can read the Automotive Industry Overview”>Automotive Industry Overview and Automotive Industry Overview”>Automotive Industry Overview.

FAQ – Terexlift C41A, C42A, AMPAC-4 Parts Catalog

Can I use this catalog to rebuild the hydraulic pump on my AMPAC-4?

No. This is a parts catalog, not a service manual. It gives you part numbers and exploded views. You need the separate service manual for rebuild procedures.

Does the catalog include part prices?

No. The catalog lists part numbers and descriptions only. You have to contact a dealer for current pricing and availability. The OEM number is the starting point.

Will this catalog work for a C42A serial number starting with 123?

Yes, if your machine’s serial number falls within the ranges listed in the catalog. The manual includes serial number breaks for both C41A and C42A models. Check the front pages to confirm your serial number is covered. If it’s after the last break, you may need a later revision. But for most production runs of the AMPAC-4, this catalog will match.

Is this a reprint or a scan of the original?

It’s a direct scan of the original Rex Chainbelt parts manual. The watermark and page numbering are preserved. You get exactly what the factory technician would have used in the 1970s.

Stop wasting time hunting through aftermarket listings that don’t match your machine. Get the factory source for your Terexlift C41A, C42A, or AMPAC-4. Access the Factory Manual now and keep it on your tablet or print it for the shop binder.