The Hydro-Gear PK-BGAB-EY1X-XXXX Hydraulic Pump is a genuine OEM PK Series hydraulic pump engineered for high-performance Toro and Exmark zero-turn mowers, including Z Master and Lazer Series models. Manufactured by Hydro-Gear, the original equipment manufacturer for Toro and Exmark hydraulic systems, this pump delivers the same factory-installed reliability, durability, and precision performance.

Designed for demanding commercial applications, the PK Series pump provides smooth hydrostatic control, consistent power transfer, and responsive maneuverability. Whether you’re maintaining professional landscaping equipment or restoring drive performance on a high-hour unit, this pump is built to handle heavy-duty workloads.

The PK-BGAB-EY1X-XXXX replaces multiple OEM part numbers including Toro 116-2444, 103-7262 and Exmark 103-7262, 116-2444, as well as Hydro-Gear reference PJ-BGAB-EY1X-XXXX. It is commonly used on Exmark Lazer AS, Lazer Z AC, Lazer Z AS, and Lazer Z LC models, along with Toro Z500 Z Master mowers (2004 and newer) equipped with 60" and 72" decks.

Because some zero-turn mowers utilize dual hydraulic pumps, this unit may replace only one pump on the machine, depending on configuration.

For best results, always verify the Hydro-Gear part number stamped on your existing pump prior to ordering. When installing a new hydraulic pump, it is strongly recommended to flush hydraulic tanks and lines, replace the oil filter, and inspect or replace the wheel motor. Contamination within the system is the most common cause of premature pump failure.

This is a special order part and is non-returnable, so confirming compatibility before purchase is essential. For assistance, contact Carroll Stream Motor Company at (248) 628-4638.

Key Features

• Genuine Hydro-Gear PK Series hydraulic pump
• OEM replacement for Toro and Exmark zero-turn mowers
• Replaces Toro 116-2444, 103-7262 and Exmark equivalents
• Crosses with Hydro-Gear PJ-BGAB-EY1X-XXXX
• Designed for commercial hydrostatic drive systems
• Built for durability, performance, and long service life
• May replace one pump in dual-pump configurations

Frequently Asked Questions

Is the Hydro-Gear PK-BGAB-EY1X-XXXX a genuine OEM pump?

Yes. This is a genuine Hydro-Gear hydraulic pump, built to the same specifications as the original unit installed on Toro and Exmark equipment.

What part numbers does this pump replace?

This pump replaces:

• Toro: 116-2444, 103-7262
• Exmark: 103-7262, 116-2444
• Hydro-Gear: PJ-BGAB-EY1X-XXXX

What equipment does this hydraulic pump fit?

It fits select:

• Exmark Lazer AS (S/N 720,000 & up)
• Exmark Lazer Z AC, AS, LC (S/N 510,000 & up)
• Toro Z500 Z Master (2004 and newer, 60" and 72" decks)

It may also fit other models using PK-BGAB-EY1X-XXXX or PJ-BGAB-EY1X-XXXX pumps.

Does this replace both hydraulic pumps on my mower?

Not always. Many zero-turn mowers use dual hydraulic pumps, and this unit may replace only one pump depending on your setup.

Why should I verify the stamped part number before ordering?

Hydraulic pumps can appear similar but differ in specifications and fitment. Verifying the stamped Hydro-Gear number ensures proper compatibility.

What should I do when installing a new hydraulic pump?

It is recommended to:

• Flush hydraulic tanks and lines
• Replace the oil filter
• Inspect or replace the wheel motor

This helps prevent contamination-related damage.

Why do hydraulic pumps fail after replacement?

Failure is most often caused by contamination left in the hydraulic system, which can quickly damage a new pump.

Is this pump returnable?

No. This is a special order part and is non-returnable.

Who can help confirm fitment?

Call Carroll Stream Motor Company at (248) 628-4638 for assistance before ordering.