Description

Volvo Trucks 85A-II, 85-III, 8.5A Parts Catalog

If you’re staring at a pile of disassembled Volvo truck parts and don’t know which bolt goes where, you’ve picked the wrong job to guess on. I’ve been turning wrenches for 28 years, and I can tell you that a parts catalog like this one is what separates a proper repair from a scavenger hunt. This is the Volvo Trucks 85A-II, 85-III, 8.5A Parts Catalog – factory-issued, 158 pages of exploded diagrams and OEM part numbers. Not a reprint. Not a third-party compilation. Original documentation that came out of the engineering department.

Accelerator Pedal and Linkage – Three Engine Options

The catalog breaks down the accelerator pedal and linkage into three separate sections: Cummins (1A5), GM (1A6), and Wauk (1A7). If you’re working on a 85A-II with a Cummins, you go to section 1A5. No guessing which part fits. Page 2 of the index shows you exactly where to find each group. That same page also lists the model 8.5A with its own index starting at the top. These aren’t generic diagrams – each one is scaled to the specific engine and chassis combination. Automotive Industry Overview might tell you how engines work, but this catalog tells you what part number to order when the accelerator linkage breaks.

Brake Group – Front and Rear Assemblies

Brake assemblies are listed for front (1B12) and rear (1B13). Separate sections for brake controls, lines for Cummins (1B18), lines for GM and Wauk (1B20), and wheel cylinders (1B22). If you need a brake line for a GM-powered 85-III, you pull section 1B20. The catalog gives you the part number for the exact line, not a universal fit. Page 1 identifies the serial number ranges for each engine – Cummins S/N 2DC101 and After, GM S/N 2DG101 and After, Wauk S/N 2DA101 and After. That matters because a brake line for a later serial number might have a different bend or fitting. Don’t trust aftermarket cross-references on this. Go straight to the factory book.

Axle Group – Front and Rear Differentials

The axle group covers front axle assembly (1A14), rear (1A16), differential and carrier assemblies for both front (1A22) and rear (1A24), plus planet spider (1B5) and tie rod (1B7). All of these components are heavy, expensive, and unforgiving if you order the wrong one. A mismatched differential carrier can lock up a wheel or shear gears. The OEM catalog tells you exactly which carrier assembly fits each model – 85A-II, 85-III, or 8.5A. That’s precision you don’t get from aftermarket sites that group everything under “Volvo front differential.” Internal Combustion Engine may explain how power gets to the wheels, but this catalog tells you the parts that deliver it.

Engine and Accessories – What You Get

Section 1E1 covers “Engine and Accessories.” Then separate sections for engine filter (Cummins, 1E2), engine mounting parts for each engine variant (1E3 for Cummins, 1E4 for GM, 1E5 for Wauk). You also get fuel lines, radiators, and connections for each engine. If you’re pulling an engine, you need mounts that match the bellhousing pattern and chassis brackets. This catalog lists every bracket, bolt, and isolator. 158 pages of exploded views – you can see how every nut and washer stacks up. That saves you the wasted time of ordering a mount kit that doesn’t fit because it’s for the wrong engine family.

3 Reasons to Choose OEM Documentation Over Aftermarket

First, aftermarket parts catalogs often use generic part numbers or skip variations between engine types. This OEM catalog from Volvo Trucks specifies exactly which part fits which serial number range. No ambiguity. Second, the index on page 2 lists every group from Accelerator Pedal to Wiring – 200+ sections organized by function and engine. Third, the exploded views show part-to-part relationships that online parts diagrams blur. You see the stack-up: washer, lock washer, bolt, bracket, and seal in order. That reduces returns and downtime. For a shop that bills by the hour, this catalog pays for itself on one axle job.

Audience Fit – Who Needs This Parts Catalog

If you’re a DIY mechanic working on a Volvo 85A-II in your home garage, you need this to avoid ordering the wrong cylinder or brake part. If you own an 8.5A loader and want to rebuild the hydraulic system, the Hydraulic Group sections (1F4, 1F7, 1F9, 1F14, 1F20) list every valve, pump, and line. Professional techs will appreciate that the wiring diagrams are included in the Wiring Group (1J6, 1J7, 1J8, 1J9) – color-coded and keyed to the factory harness. This catalog is for anyone who hates cross-shopping three different websites to verify a part number.

Does this parts catalog include torque specifications?

No, this is a parts catalog, not a service manual. You need the separate service manual for torque values.

How do I find the part number for the bucket cylinder on my 85-III?

Go to Cylinder Group – Boom Cylinder Assy (1D11), Bucket Cylinder Assy (1D12), and Bucket Leveling Master Cylinder (1D16). Each section shows an exploded view with callouts. The part number is listed next to the component. Make sure you match your bucket type (standard or leveling) because the cylinder stroke differs. The catalog also includes the Bucket Cylinder Assy and Indicator (1C3) in the Bucket Assy group. Cross-reference with your machine’s serial number – listed on page 1 as Cummins S/N 2DC101 and After, GM S/N 2DG101 and After, Wauk S/N 2DA101 and After. If your serial number falls outside those ranges, you need an earlier catalog. This one covers 85A-II and 85-III for those ranges, plus the 8.5A model.

Can I use this catalog for the Volvo 8.5A model?

Yes, the model 8.5A is covered. The index on page 2 includes “MODEL 8.5A” and the same sections apply. All three models share the same group numbering system.

What about older serial numbers – are they covered?

No. This catalog is valid only for Cummins S/N 2DC101 and After, GM S/N 2DG101 and After, and Wauk S/N 2DA101 and After. Earlier production requires a different parts catalog. Check your serial plate before ordering.

You can spend hours cross-referencing aftermarket catalogs or risk ordering wrong parts. Or you can access the factory manual and get it right the first time. Volvo Trucks L480 1990 Parts Catalog – OEM Factory Specs is another solid option if you work on that series. Volvo Trucks L270B 1991 Parts Catalog – OEM Factory Specs covers a different chassis. Volvo Trucks L140 1989 Parts Catalog – OEM Factory Specs is for smaller models. For your 85A-II, 85-III, or 8.5A, this is the only parts catalog you need. Access the Factory Manual today.