PROLINE™ HDX 48 in. (122 cm) Mid-Size Mower (50-State Model)
Product Information
- Model #: 44448
- Serial #: 408000000 - 409999999
- Product Type: Walk Behind Mowers
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Assembly Drawings
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Operator's Manual
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Parts Catalog
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Product Warranty
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Quick Start Guide
Hypr-Oil™ 500 (quart) (Part # 114-4713)
Hypr-oil™ 500 (quart). Toro Hypr-Oil 500 is a high-performance hydraulic fluid specifically formulated and approved by Toro engineering for use in Toro commercial zero turn mowers. It provides excellent wear and corrosion protection for hydraulic systems, helping to maintain consistent performance and extend the service life of hydraulic components. Always refer to your operator manual for the correct fluid specification and service intervals.
Hypr-Oil™ 500 (gallon) (Part # 114-4714)
Toro Hypr-Oil 500 is a high-performance hydraulic fluid specifically formulated and approved by Toro engineering for use in Toro commercial zero turn and stand-on mower hydraulic systems. Maintaining the correct hydraulic fluid and changing it at the manufacturer-recommended interval is critical to protecting hydraulic pumps, wheel motors, and other hydraulic components from wear and corrosion — particularly on machines operating under commercial duty cycles. Refer to your operator manual for the correct change interval and fluid capacity for your equipment.
Hypr-Oil™ 500 Hydraulic Oil (5 gallon) (Part # 114-4715)
Toro Hypr-Oil 500 is a high-performance hydraulic fluid formulated and approved by Toro engineering for commercial zero turn and stand-on mower hydraulic systems. The 5-gallon commercial bulk pack is designed for fleet operators and service shops performing multiple machine hydraulic fluid changes. Maintaining the correct hydraulic fluid on schedule protects pumps, wheel motors, and other hydraulic components from accelerated wear. Refer to your operator manual for the correct change interval and capacity for each machine. Do not mix with other hydraulic fluids.
Bagger Adapter Kit for 36in GrandStand Mower (Part # 121-7515)
Bagger Adapter Kit for 36in GrandStand Mower. When it comes to reliability, Toro delivers replacement parts designed to the exact engineering specifications of our equipment. For peace of mind, insist on Toro genuine parts.
Please contact your local dealer
Premium Fuel Treatment (12 oz.) (Part # 131-6572)
Toro Premium Fuel Treatment helps ensure clean, reliable engine performance and protection. Good for your lawnmowers, snow blowers, weed whackers, leaf blowers and other small engine power equipment. Using Toro Fuel Treatment with every fill up provides protection for two and four cycle small engines.
GrandStand Electric Accessory Port (Part # 133-1438)
Toro OEM electric access port provides an electric outlet to charge small onboard devices. Verify your model and serial number to confirm compatibility before ordering.
Weight Kit (Part # 138-6866)
Genuine OEM Part
Please contact your local dealer
16.5 Inch Mulching Blade (Part # 138-8884-03)
Toro 16.5 Inch OEM mulching blade. Toro mulching blades feature more curves and an increased cutting edge. The curved surface and increased cutting edge allows the blade to cut the grass and bring it into the deck where it is cut several more times before falling back onto the lawn in much smaller pieces. . This Toro blade has multiple applications. Be sure to verify model and serial number to ensure the correct part.
16.5 Inch Hi-Flow Blade (Part # 138-8888-03)
This Toro OEM 16.5-inch Hi-Flow replacement mower blade is designed to produce high lift, cutting grass cleanly and propelling clippings upward and out through the discharge chute. Hi-Flow blades — also referred to as basic, standard, or 2-in-1 blades — are the preferred choice when using a grass catcher or bagger, as the increased airflow drives clippings efficiently into the collection bag. This blade is compatible with multiple Toro riding lawn mowers models — always verify your model and serial number before ordering to confirm the correct fit.
16.5 Inch Hi-Flow Blade (Part # 138-8891-03)
Toro 16.5 Inch OEM Hi Flow blade. Hi-Flow are also known as basic blades, regular blades, or 2-in-1 blades, Hi-Flow mower blades are the go-to blades for mowers with a bagger. The blades are designed to cut the grass and Flow the clippings, propelling them up and out of the discharge chute. This Toro blade has multiple applications. Be sure to verify model and serial number to ensure the correct part.
Height of Cut (HOC) Brackets Kit (Part # 139-4063)
Genuine OEM Part
Wide Area Mower Light Kit (Part # 139-5595)
This genuine Toro OEM LED light kit is designed for Toro Wide Area Mowers and provides high-intensity, low-amperage illumination for commercial operators who mow in early-morning, evening, or low-light conditions. The cast aluminum housing and stainless steel hardware ensure durability under demanding commercial mowing schedules. Verify your model and serial number before ordering.
Soft Side Bagger (Part # 139-7860)
This genuine Toro OEM soft-side bagger is designed to collect grass clippings directly from your Toro mower deck, keeping the lawn clear and eliminating the need to rake after mowing. Soft-side baggers are lighter and easier to handle than hard-sided alternatives and are ideal for homeowners who prefer a bagging setup over mulching. One of the most frequently purchased accessories at the time of a new mower purchase. Verify your model and serial number before ordering.
48 inch Recycler Kit (Part # 140-1914)
By adding the Toro Recycler system to your Toro 48-inch mower, you create your own natural fertilizer. This patented system cuts grass clippings 6-8 times, turning them into a fine, nutrient-rich mulch to feed your lawn all season. The secret lies in the unique 'kickers' that direct clippings back into the blades to be re-cut before being released into your lawn to promote its health and vitality.
Please contact your local dealer
Rubber Deflector Kit (Part # 140-4300)
This genuine Toro OEM replacement part is manufactured to the exact engineering specifications of your Toro equipment, ensuring correct fit and reliable performance. Verify your model and serial number to confirm compatibility before ordering.
Bagging Enhancement Kit for Titan 48 Inch Deck (Part # 140-5121)
This bagging enhancement kit can be used with 48 inch Toro Titian riding mowers. It will enhance bagging performance in extreme conditions such as heavy, wet grass or autumn leaf bagging. Refer to the operator manual for installation and use. When it comes to reliability, Toro delivers replacement parts designed to the exact engineering specifications of our equipment. For peace of mind, insist on Toro genuine parts.
Recycler 16.6 Inch Blade Pack (6) (Part # 140-7730)
This Toro OEM 16.6-inch Recycler replacement mower blade — sold as a pack of 6 is built to work within Toro's Recycler mulching system, featuring uniquely shaped 'accelerator' wings that act as a fan to keep clippings circulating beneath the deck. As clippings are forced back into the cutting zone, they are re-cut multiple times into fine pieces that fall back into the lawn and break down into natural fertilizer — feeding the grass and reducing the need to bag or rake. Compatible with multiple Toro riding lawn mowers models — verify your model and serial number before ordering.
Hi-Flow16.5 Inch Blade Pack (6) (Part # 140-7734)
This Toro OEM 16.5-inch Hi-Flow replacement mower blade — sold as a pack of 6 is designed to produce high lift, cutting grass cleanly and propelling clippings upward and out through the discharge chute. Hi-Flow blades — also referred to as basic, standard, or 2-in-1 blades — are the preferred choice when using a grass catcher or bagger, as the increased airflow drives clippings efficiently into the collection bag. This blade is compatible with multiple Toro riding lawn mowers models — always verify your model and serial number before ordering to confirm the correct fit.
Hi-Flow 18 Inch Blade Pack (6) (Part # 140-7738)
This Toro OEM 16.5-inch Low Flow replacement mower blade — sold as a pack of 6 features a slightly curved tip design that keeps airflow to a minimum during operation. Low Flow blades are the right choice for mowing in sandy, dusty, or dry conditions where high suction would stir up excessive debris — they also cause less strain on the engine than Hi-Flow blades, making them a practical option when horsepower is a consideration. Compatible with multiple Toro riding lawn mowers models — verify your model and serial number before ordering.
10W30 4-Cycle Engine Oil - 32 oz. Bottle (Part # 38280)
The Toro 38280 Premium 4-Cycle Lawn Mower Engine Oil 10W-30 is specially formulated to meet specific 4-cycle engine manufacturer requirements calling for 10W-30. This lawn mower engine oil provides the ultimate protection for all 4-cycle OPE engines. The lawn mower engine oil is developed with Toro engineering to meet the standards for all air-cooled, liquid-cooled and diesel engines. To maximize the performance of your Toro lawn mower, we highly recommend using this Toro lawn mower engine oil, which has been specifically formulated for best results. The lawn mower engine oil provides extreme performance in all temperatures, enhancing the life of your lawn mower's engine.
SAE 30 4-Cycle Lawn Mower Engine Oil 32 oz (Part # 38903)
Toro SAE 30 4-cycle engine oil passed the strictest requirements in thousands of hours of testing in hundreds of engines before you filled your lawn mower. This oil meets or exceeds performance requirements of all OEM engines (Toro, Briggs & Stratton, KOLHER, Honda, and Tecumseh). The use of Toro SAE 30 4-cycle lawn mower oil minimizes molecular shearing for extended life in hot-air-cooled applications vs multi-grades (i.e., 10W-30).
TWO-WHEEL SULKY, PROLINE MIDSIZE (Part # 44401)
Spark Arrestor (Part # 98-9099)
Toro OEM spark arrestor prevents carbon build ups from being ejected from the engine and igniting a fire.
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Model #
44448 -
Serial #
408000000 - 409999999 -
Product Name
PROLINE™ HDX 48 in. (122 cm) Mid-Size Mower (50-State Model) -
Product Brand
Toro -
Product Type
Walk Behind Mowers -
Product Series
Mid-Size ProLine Mower -
Chassis Type
Walk Behind -
Swath
48 inch / 122 cm -
Discharge
Side -
Engine/Motor Manufacturer
Kawasaki -
Engine/Motor Size
20.5 hp -
Engine/Motor Type
4 Cycle -
Engine Starter
Electric -
Transmission Type
Hydrostatic -
Traction Type
Rear WD
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Engine: Engine Speed
3600±100 RPM -
Engine: Spark Plug
NGK BPR4ES -
Engine: Spark Plug Gap
.030"/ .76mm -
Engine: Ignition Coil Air Gap
.008-.016" / .2-.4mm -
Engine: Battery
12V 230CCA -
Drive System: Ground Speed
Forward: 0-7 mph -
Chassis: Tire Pressure
12-14psi (83-97kPa) -
Engine: Engine Oil Type
71 oz. (2.1L) 10w-30 with filter change -
Drive System: Gearbox Lubricant
HYPR-OIL 500 -
Chassis: Height of Cut Range
1.5" - 4.5" (38-114mm)