Description

Clark-hurth L320 1991 Parts Catalog

I’ve been turning wrenches since before half the techs in my shop were born. 28 years, ASE Master, six bays in San Antonio. And I’ll tell you straight: if you’re working on a Clark-hurth L320 wheel loader and you don’t have the factory parts catalog in your hand, you’re guessing. Guessing costs you money, time, and sometimes a customer. This is the real deal — a 690-page Clark-hurth L320 1991 Parts Catalog fresh from the press. July 1991, Publication 3410. Covers both the Cummins 811A and 811AC serial number ranges. This isn’t some aftermarket knockoff that swaps a generic seal for the one that actually fits. It’s the original document that the dealer parts counter used.

The catalog is built around group numbers. Each group covers a specific system — engine, transmission, hydraulics, brakes, you name it. On page 3 they explain how to use it: alphabetical index in front, numerical index in back. You look up the part description, get the group number, flip there, and the illustration shows you exactly what you’re ordering. But here’s the kicker — they flat-out warn you: illustrations are typical examples only. Do not use them as an assembly guide. That’s the difference between a parts catalog and a service manual. This book is for ordering, not for rebuilding. Respect that and you won’t order a piston when you need a ring.

690 Pages of Original Clark-hurth Data

You’re not getting a reprint that’s been scanned at 72 dpi and missing half the pages. This is the complete document — every page, every revision note at the bottom left corner. The date codes are right there: first three digits revision level, last two digits the original release year. If you’ve ever tried to cross-reference a part number using a photocopy that’s been through three generations of copy machines, you know why this matters. The clarity of the illustrations is preserved. You can read the callout numbers. That alone is worth the price of admission when you’re standing in front of a teardown.

Parts Catalog vs Repair Manual: Know the Difference

I’ve had guys call me asking if this catalog tells them how to rebuild the transmission. No. It doesn’t. This is a parts catalog. It gives you the exploded-view illustrations, the part numbers, the quantities per assembly, and the ordering instructions. For repair procedures you want the service manual — we’ve got those too, like the Clark Michigan 85III Tractor Shovel Parts Manual (1965) if you’re working on older iron. But for getting the right part the first time, this book is what you need. The numerical index in the rear lets you search by part number. If you have a part in your hand that’s just a blob of rust with three digits visible, that index might get you back on track.

What Serial Numbers Does It Cover?

This manual is for machines with Cummins 811A and Cummins 811AC engines. The cover page says “RECORD YOUR MACHINE SERIAL NUMBER HERE.” I’d do that. Write it in permanent marker on the inside cover. When you call to order parts, the distributor will ask for model and serial number. Don’t skip that step. The catalog is arranged so that different serial number breaks are handled within the group sections — but you need to know which range your loader falls under. If you’ve got a different engine variant, check the Clark Parts Manual Stat 16 Model 85A/85A1 for those machines.

Group Number System Explained

Page 3 walks you through the group number organization. Groups are in consecutive numeric order. Say you’re hunting for the hydraulic pump group — you look up “hydraulic pump” in the alphabetical index, get the group number, and land on the right page. Every illustration has callouts linked to a parts list with description, part number, and quantity. The parts list is on the same page or facing page. No flipping back and forth. VME — the company behind Clark — specifically recommends using “Original Equipment Replacement Parts” and the service know-how of their distributors. I agree. Aftermarket hydraulic seals might save you $10 now, but they’ll cost you a pump later. Stick with OEM.

3 Critical Tips for Using This Catalog

• Always give the serial number when ordering. The distributor needs it to confirm which revision of the part you need.
• Check the revision date at the bottom of each page. If your page is older than the machine’s build date, there may be a superceded part number.
• Do not use illustrations for assembly. They are for locating and identifying parts only. Use the service manual for torque specs and sequence.

If you’re into internal combustion fundamentals, the Internal Combustion Engine article on Wikipedia is a decent primer, but for this loader’s specific engine parts, this catalog is the only source you should trust.

Q: Is this a repair manual or a parts catalog?

It’s a parts catalog. For repair procedures, get the service manual.

Q: How do I find the part number for the main hydraulic pump on my L320?

Use the alphabetical index in the front to locate “hydraulic pump” or “pump, hydraulic.” That will give you the group number. Then flip to that group section. The illustration will show the pump assembly with callouts. Each callout corresponds to a line in the parts list. Cross-reference the serial number of your machine (found on the ID plate) to ensure you’re ordering the correct variant. The numerical index in the back can also be used if you already have a partial part number. Remember to quote the part number, description, and quantity when ordering. If you’re uncertain about which revision, call the distributor — don’t guess.

Clark Michigan Wheel Loader 75C Parts Manual is another option if you’re running that model. For a broader look at the industry that built these machines, check the Automotive Industry Overview.

Whether you’re pulling a transmission or just tracking down a missing bolt, having the right part number saves hours of chasing wrong parts down. Access the Factory Manual and keep it on your tablet or print the sections you need. This is the same book the dealership parts counter pulls off the shelf — no abbreviations, no ambiguity, just the data you need to get the loader back in the dirt.