Description

Yanmar CTL55, MTL312 2009 Parts Catalog – OEM Engine Parts Manual

Ordering the wrong part because you relied on a third-party catalog? I’ve seen it happen twice this month alone. That’s wasted time, a stuck machine, and a pissed-off customer. This 51-page Yanmar CTL55, MTL312 2009 Parts Catalog is the factory-issued parts manual – not some aftermarket reprint, not a compressed scan. It’s Form 917324 Revision B, printed by Yanmar for the 4TNV84T-ZKTBL engine used in Gehl CTL55 and Mustang MTL312 compact track loaders. You get exploded diagrams with correct part numbers, quantities, and references – exactly what you need to order without calling your dealer six times.

Cylinder Block, Gear Housing, and Flywheel Housing

Every engine rebuild starts here. The manual breaks out the Cylinder block sections (page 3 lists them under ENGINE SERVICE PARTS), then goes into Gear Housing, Flywheel Housing and Oil Sump, and the Cylinder Head and Bonnet. Each section shows the exact Yanmar part numbers – not generic equivalents. If you’re doing a head gasket job on a 4TNV84T, you’ll find the bonnet fasteners and gasket sets listed with factory quantities. I trust these diagrams because they come from the same source as the assembly line. Avoid mismatched bolts or missing seals by using the correct reference numbers printed here. The Section Notes at the back also cover the Turbine, Lube Oil Line, and Generator – extras that aftermarket catalogs love to leave out.

Camshaft and Crankshaft: Matching the Right Parts

The Camshaft and Driving Gear section – two pages in the table of contents – shows the gear train components with thrust plates and bearings. Same for the Crankshaft and Piston section: it lists the piston pin, rings, and rod bearings by OEM numbers. If you’re replacing a camshaft, you need the correct gear alignment marks and bolt torques – this catalog gives you the part numbers, but you’ll also want the engine service manual for assembly specs. That said, having the correct P/N up front keeps you from buying a cam that doesn’t match the timing gear. For a reference on why accurate parts documentation matters across the industry, check out this Automotive Industry Overview.

Cooling Water System and Lubrication Oil System Parts

The Cooling Water System section covers water pump, thermostat housing, and coolant lines – all with Yanmar part numbers. If you’ve ever bought a water pump that didn’t align with the fan shroud, you know why you need factory exploded views. The Lubrication Oil System section lists oil filter, cooler lines, and pan gasket. These are the parts that fail when someone skips the correct sealing washer or uses an off-spec filter. Stick with the OEM references and your oil pressure stays where it should be.

Who Needs This 51-Page Parts Catalog?

Home garage guys rebuilding a Yanmar engine in their shop? You need this. Fleet mechanics maintaining a Gehl CTL55 or Mustang MTL312? You need this. Even a dealer parts person cross-referencing numbers will save time. The manual covers every engine group: fuel injection pump, governor, fuel injection valve, fuel filter, starting motor, and electric parts. It’s not a service manual – it’s a parts identification tool. Pair it with the factory service manual and you have the complete picture. For related OEM parts catalogs, see Ammann Yanmar B12 B17 1991 Parts Catalog – OEM Factory Specs”>Ammann Yanmar B12 B17 1991 Parts Catalog – OEM Factory Specs.

Why OEM Documentation Beats Aftermarket Copies

Aftermarket parts catalogs often transpose part numbers, skip the Turbine and Lube Oil Line sections, or use blurry illustrations. This is a direct-from-Yanmar PDF – 51 pages, 2009 publication, with the original Form number. You can zoom in on the drawings and read the numbers clearly. And because it’s the OEM version, you know the parts listed are the same ones that came off the assembly line. Don’t trust a third-party scan when your machine’s downtime costs real money. Another useful reference: Automotive Industry Overview shows why standardised parts documentation matters across all heavy equipment.

Frequently Asked Questions

Does this parts catalog include torque specifications?

No. This is a parts catalog, not a service manual. It lists part numbers, quantities, and exploded views. For torque values, get the factory engine service manual.

Can I use this manual for engine disassembly?

Not directly. The exploded views show how parts fit together, but they lack step-by-step removal procedures. You want the service manual for that. This one is strictly for ordering correct replacement parts on the CTL55 and MTL312.

What models are covered exactly?

It covers the Yanmar 4TNV84T-ZKTBL engine used in Gehl CTL55 and Mustang MTL312 compact track loaders. Not earlier B series or other models. Verify your engine serial number matches the manual.

How many pages is the manual?

51 pages, including the table of contents and section notes. It covers everything from Cylinder Block to Generator and Tool and Gasket Sets.

When you’re ordering parts for a Yanmar engine in a CTL55 or MTL312, the difference between a good repair and a headache is having the right part number. Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs”>Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs is another manual if you work on those models. For a larger reference, Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM”>Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM covers a different engine family. But for this specific 4TNV84T, this is the one. Access the Factory Manual now and get your parts order right the first time.