Description

Leeboy 300, 300T Service Manual – Factory Specs for Asphalt Roller

If you’re working on a Leeboy 300, 300T Service Manual is the only thing between you and a torn down roller that won’t roll. I’ve pulled wrenches long enough to know that aftermarket PDFs mix up return and pressure lines on the hydraulic schematic. This 49-page factory print puts the real data in your hands—no reprints, no generic diagrams. The table of contents alone lists 23 sections from specifications to parts breakdowns.

Got a standard 300 or the towable 300T? Pages 6 and 7 give you dry weights, drum dimensions, and engine specs for each. The manual doesn’t lump them together; it treats them as separate machines because they are. Page 6 is the standard roller; page 7 is the towable. That’s the kind of detail you expect from OEM, not from a copy that was scanned at 72 dpi.

Specifications – Standard 300 vs Towable 300T

Two different rollers, two different spec sheets. Standard 300 uses a 20-hp Kubota; the 300T runs a 20-hp gas engine but with a different curb weight and towing hitch. Page 6 tells you the drum width (48 inches), drum diameter (26 inches), and water tank capacity (42 gallons). Page 7 gives the towable version’s specs: 1,795 lb dry weight and a 2-inch ball hitch tongue weight of 170 lb. If you’re replacing a drum bearing, you need the correct drum shaft dimensions from these pages.

Hydraulic Schematic – Page 22

Page 22 has the full hydraulic schematic for both models. The flow path starts at the pump, goes through the control valve, then to the drive motor and vibratory motor. Each line is labeled with size and fitting type. No guessing which port is pressure and which is return—the factory drawing shows it. If you’ve ever had a roller that creeps in neutral, this schematic will show you where the internal leakage is likely coming from.

Trouble-Shooting Guide – Page 20

Page 20 lists 12 common problems and their fixes. First item: Engine won’t start – check battery voltage, fuel shutoff, and safety switch on the operator seat. Second item: Roller vibrates but doesn’t move – check drive belt tension and gear pump pressure. That page alone saves you hours of tearing into the hydrostat when the problem is a $10 belt.

Does This Manual Cover the Water Spray System?

Yes. Page 16 walks through operation of the water spray system: tank fill, pump prime, nozzle cleaning, and manual shutoff valve location. It also includes a warning about water tank safety on page 19—never pressurize the tank with compressed air. That’s the kind of detail a cheap knockoff leaves out.

Factory Print vs Aftermarket Copy – Why It Matters

I’ve seen guys buy a 300-page PDF for $15 and end up with a manual that has the wrong torque specs for the drum bolts. This Leeboy 300, 300T Service Manual is the original factory document. The lubrication chart on page 21 lists the exact grease intervals and oil viscosities. The electrical schematic on page 23 uses OEM wire colors and connector pins. You can’t get that from a third-party rewrite. If you’re serious about keeping this roller running for another 10 years, you want the factory book.

Understanding the hydraulic system is different from a Manual Transmission system in a car, where shift linkages are mechanical. The roller’s drive is all hydrostatic. If you’re coming from a background in Manual Transmission repairs, the electrical schematic on page 23 will look unfamiliar – but the manual labels every wire and connector.

Parts Breakdown – Water Tank and Main Frame

Pages 26-27 cover the water tank and main frame assembly with exploded diagrams and part numbers. Need the drain plug O-ring? It’s part number 300-123. The manual even includes the torque spec for the tank mounting bolts. No need to call the dealer.

Related Manuals:

• Leeboy 8500 Limited Service Manual – OEM Factory Specs
• Leeboy 8515, 8816 Service Manual – OEM Factory Specifications
• Leeboy Tack Tank Asphalt Distributor 2007 Service Manual – OEM Factory Specs

Does the manual include wiring diagrams?

Yes, page 23 has the full electrical schematic.

How many pages is the Leeboy 300T service manual?

49 pages total. That includes specifications for both the standard 300 and the towable 300T, part illustrations, hydraulic and electrical schematics, a lubrication chart, and the trouble-shooting guide. If you’re doing a full rebuild, you want the part breakdowns starting on page 24. The water tank and main frame assembly alone covers four pages with exploded diagrams and part numbers.

If you’ve got a 300 or 300T that’s leaking, not starting, or vibrating weird, you’re going to need the factory reference. Don’t trust a scanned copy from a forum. Access the Factory Manual from AutoRepairManuals and have the OEM specs right in front of you.