Description

Prime-mover LS-70 1983 Parts Catalog

If you’ve ever ordered a part for a machine, waited three days, then opened the box to find the wrong piece, you know the pain. A Prime-mover LS-70 1983 Parts Catalog stops that waste before it starts. This isn’t a reprint of someone’s scan from a cloudy photograph – it’s the original factory document, 36 pages, issued September 1983 by The Prime-Mover Co., Muscatine, Iowa. Want the right seal for the hydraulic pump? Need the correct pivot pin for the lift arms? This catalog gives you the part number matched to your LS-70’s serial number. Nothing else.

Let’s be clear: I’ve torn down more skid steers than I care to count. Aftermarket parts catalogs are a gamble. They guess at supersessions, skip revisions, and sometimes list parts that never existed. This manual is the kind you pin to the bench and trust because it came from the factory floor. It covers the LS-70 gasoline model only – no diesel, no LS-80 – and that focus means every diagram is specific, not generic.

36 Pages of Factory-Correct Part Numbers

Thirty-six pages might not sound like much when you’re used to thousand-page service manuals. But for a parts catalog, that’s enough. The Prime-mover LS-70 parts catalog is tight – each page carries exploded views with callouts, part numbers, and descriptions. You find what you need, write down the number, call your dealer. No flipping through cross-reference tables. The serial number threshold is printed right there on page 1: effective serial number 603295. If your machine is below that, some parts may differ – the manual flags those differences. That’s the kind of detail you don’t get from a third-party list.

Parts Ordering: Why the Serial Number Matters

Page 3 of the manual contains the parts ordering instructions. If you skip that page, you’re inviting delays. It tells you to supply part number, quantity, model, and serial number. The Prime-Mover Co. designed these loaders with running changes – a steering cylinder from early 1983 might not swap with a late 1983 model. Without the serial number, you get a part that fits someone else’s machine. This catalog gives you the logic: the part number changes when the engineering change happened. You will see that clearly in the diagrams. Don’t guess. Look up the serial range on page 1, then find the correct exploded view.

Are Aftermarket Catalogs Reliable for Vintage Loaders?

Short answer: no. Aftermarket ‘universal’ parts books for skid steers often mix up bearing sizes or omit lubrication fittings. The Prime-mover LS-70 uses specific seals and hydraulic fittings that aren’t on a grocery shelf. This 1983 catalog is the only reliable source for the original part numbers. Even if you plan to cross-reference to aftermarket bearings, you need the factory number first. I’ve seen mechanics order a wheel seal based on an online catalog, get the wrong one, and have the loader sit for two extra days. That costs money. This manual pays for itself on the first correct order.

Warranty and Service Life: What the Manual Covers

The first few pages of this catalog include the original warranty statement. Twelve months or 500 hours, whichever comes first. It also lists what’s not covered – normal service items like seals, gaskets, hoses, tube-lines, rubber lines, wiring, electrical connections. Those are the parts you’ll order most often. The catalog has them all, but you need to know that the listing doesn’t include O-rings or small hardware unless they appear in the exploded views. The parts catalog is not a repair manual – it does not tell you how to install the parts. It tells you what to order. Pair it with the service manual for torque specs and procedures. PRIME-MOVER L-900 Skid Steer Loader Parts Manual and Prime-Mover L32/36 Mason Tender Parts Assembly might also be useful if you have other machines in the fleet.

How to Use This Manual on the Bench

Print it or keep it on a tablet. Either way, mark the serial number of your LS-70 on the cover page. Then flip to the section that matches the part you need – drive train, hydraulics, chassis, engine accessories. The exploded views are arranged by system. Each assembly has a reference number that links to the parts list. Cross-check the part description with what you removed. If the manual says ‘seal, lip type, 1.5 in ID’ and the one in your hand is metric, you’ve got the wrong section. Stop. Verify the serial number. This catalog is only as good as your honesty about what machine you’re working on. I’ve seen guys order parts for an LS-70 from a pre-1983 manual and wonder why they don’t fit. Check the date: 1983. Check the model: LS-70 gasoline. Check the serial range. No shortcuts.

For the broader context of Automotive Industry Overview, this kind of OEM catalog is what keeps old iron running when dealers stop stocking parts. The Automotive Industry Overview background shows how standardization of parts catalogs evolved – but that doesn’t help you when you need a specific hydraulic filter for a 1983 loader. This catalog does. It’s the difference between reading a history book and having the original blueprint.

If you need a companion for heavier loaders, look at PRIME-MOVER L-1200 Skid Steer Loader Parts Manual. Same factory format, different model.

FAQ

Does this manual include torque specs or repair procedures?

No. This is strictly a parts catalog – exploded views, part numbers, quantities, and ordering instructions. Repair specs like bolt torque live in the separate service manual.

My LS-70 has a different serial number than shown. Can I still use this catalog?

The catalog lists effective serial number 603295. If your machine is below that, some parts may differ – the manual does not cover earlier revisions. You can still use it for the majority of parts, but verify any part that might have been updated. Prime-Mover made running changes; the serial number cut-off is printed so you know exactly which parts apply. If your serial is above 603295, the catalog should be fully correct. If you have a machine from 1979 or 1980, you need an earlier edition. This is the 1983 revision.

Stop fighting with wrong parts and wasted time. Access the Factory Manual for your Prime-mover LS-70 today. Thirty-six pages of OEM data that a mechanic in 1983 would have pinned to his bench. It still works the same way now.