Description

LS Tractor PLUS 70, PLUS 80, PLUS 90 Parts Catalog – Factory OEM Exploded Diagrams and Part Numbers

If you’ve ever ordered a part for an LS Tractor and got the wrong one because the parts diagram was garbage, you know the feeling. You’ve got a LS Tractor PLUS 70, PLUS 80, PLUS 90 sitting in the shop with a blown injector or a cracked crankcase, and you need the exact OEM part number. Not a guess. Not a cross-reference from someone who never held a wrench. This is a factory-issued Parts Catalog, 878 pages, direct from LS Tractor. No resized scans, no third-party redraws. Every group listed — from the crankcase to the turbocharger — has the original part numbers and exploded views. If you’re rebuilding an engine or chasing an oil leak, this is the document you put on the bench next to your torque wrench.

Engine Assembly Group Breakdown (Q100S01 Series)

Page 2 of the catalog starts the engine assembly group for the 72PS variant. The crankcase assembly (Q110S01-1), oil pan (Q145S01-1), timing gear case and gear (Q130S01-1), flywheel housing (Q155S02-1), air breather, cylinder head, rocker cover and camshaft, intake and exhaust manifolds, crankshaft, connecting rod, piston, flywheel, cooling system, balancer, fuel system, injector, electric parts, fuel pump and filter, turbocharger, oil system — it’s all there with OEM part numbers. The same treatment repeats for the 80PS variant starting on page 3, and the 88PS variant on page 4. Each horsepower level uses different sub-groups, so you don’t cross-thread a part number between models.

Fuel System Diagrams: From Injector to Fuel Pump

The fuel system sections (Q125S01 series) are broken out by model power level. For the PLUS 70 72PS you get four separate fuel system group numbers (Q125S01-1 through Q125S01-4), injector group Q125S03-1, and fuel pump & filter groups Q125S02-1 and Q125S02-2. Each part is illustrated in an exploded view with the callout number that matches the parts list. If the injection pump on your PLUS 80 needs a rebuild, you look up group Q125S01-5 or Q125S01-6, find the exact seal kit or delivery valve, and order with certainty. No guesswork, no returns.

Turbocharger and Oil System Coverage (Q185S01, Q140S01)

For the 72PS engine, the turbocharger group is Q185S01-1. The oil system is covered across five groups: Q140S01-1 through Q140S01-5. That includes oil pump, filter housing, lines, and lubrication circuits. On the 80PS engine you get a different turbo group (Q185S01-2) and ten oil system groups (Q140S01-6 through Q140S01-10). The exploded diagrams let you trace exactly which O-ring or gasket is leaking without pulling things apart twice.

3 Key Reasons to Use Factory Part Numbers

First, guaranteed fitment. LS Tractor engineered these parts to specific clearances — one wrong bolt can cause a rod failure. Second, you avoid catastrophic mistakes. I’ve seen a tech install a 80PS piston into a 72PS block because he used an aftermarket cross-reference that grouped all three models together. That cost a cylinder head. Third, you save billing time. When you call the dealer with the factory part number from this catalog, you get the part, not a runaround. That’s the difference between a one-hour job and a three-day headache.

Get the Right Part Number the First Time

Don’t rely on a screen shot from a training video or a faded tag on the old part. The exploded views in this catalog show every fastener, gasket, and seal with a unique number. For example, the cylinder head group Q116S01-1 for the 72PS engine lists the head bolts, valve guides, and injector sleeves separately. Cross-reference that with the parts list and you’ll order exactly what the factory intended. No returns, no waiting.

Source Validity: OEM vs Aftermarket

This is a genuine LS Tractor publication. Look at the cover — it carries ASAE, CE, OECD, ISO9001, and ISO1401 certifications. Those aren’t stickers a reprint house adds. This catalog was printed for use by dealers and service centers. The part numbers in here are the same ones LS Tractor uses in their inventory system. Aftermarket catalogs often use generic nomenclature or skip small components. This one doesn’t. For more LS Tractor coverage, check the related catalogs: LS Tractor R50, R60 Parts Catalog | 704 Pages OEM and LS Tractor J23 HST J27 HST Parts Catalog. Also see LS Tractor C3030/C3040 Parts Manual. For context on why factory documentation matters in the Automotive Industry Overview, the Automotive Industry Overview outlines how proper sourcing improves safety and reliability.

Frequently Asked Questions

Does this catalog include part numbers for the PLUS 70, PLUS 80, and PLUS 90?

Yes. Each model and horsepower variant has its own groups — 72PS, 80PS, and 88PS. The engines are different: crankcase, oil pan, cylinder head, and fuel system groups are listed separately.

Are the exploded diagrams clear enough for a home mechanic?

They are factory line drawings with callout numbers. Every component has a number that matches the parts table. If you can read a blueprint, you can use this catalog.

Does the catalog cover the transmission or hydraulic system?

This Parts Catalog is focused on the engine assembly group, fuel, oil, cooling, turbo, electrical, and related components. It does not include the transmission, final drive, or hydraulic system sections. Those are covered in separate service manuals.

What if I need a part number for a 72PS engine but my tractor is a PLUS 80?

Then you need the 80PS group pages. Don’t mix them. The PLUS 80 uses a different crankcase, pistons, and turbo. Using the 72PS part could cause bearing clearance issues. Always verify the model and power rating on your tractor’s serial plate before ordering.

Stop wasting time on parts that don’t fit. Access the original factory Parts Catalog for the LS Tractor PLUS 70, PLUS 80, and PLUS 90. 878 pages of accurate exploded views and part numbers that LS Tractor technicians use. Put it on your workbench and start ordering the right parts today. Access the Factory Manual.