Hydro Gear Lip Seal – Fits MTD, Cub Cadet, Craftsman (Replaces 51161, 50735)
Hydro Gear Lip Seal – Fits MTD, Cub Cadet, Craftsman (Replaces 51161, 50735) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Hydro Gear Lip Seal – Fits MTD, Cub Cadet, Craftsman (Replaces 5116...
Hydro Gear Lip Seal – Fits MTD, Cub Cadet, Craftsman (Replaces 51161, 50735) is backordered and will ship as soon as it is back in stock.
Product Details
This Hydro Gear replacement lip seal is engineered for use in Hydro-Gear hydraulic pumps, specifically the BDA, BDP-10A, PE, PG, PJ, and PK Series. It is a vital component for various riding lawn tractors and outdoor power equipment manufactured by MTD, Cub Cadet, Craftsman, Troy Bilt, Bolens, and White Outdoors.
This part offers direct interchange with Hydro Gear part numbers 51161 and 50735, as well as Husqvarna 583039301.
- Designed for direct replacement, ensuring a precise fit.
- Constructed from durable polyethylene for reliable pump shaft sealing.
- Package includes two seals to have a spare on hand.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Hydro Gear | 51161 |
| Hydro Gear | 50735 |
| Husqvarna | 583039301 |
Engine & Model Compatibility
Confirm your pump model in the tables below.
This seal is compatible with several series of Hydro-Gear hydraulic pumps.
| Brand | Model | Equipment Type | OEM Part No. |
|---|---|---|---|
| Hydro-Gear | BDA Series | Hydraulic Pumps | 51161, 50735 |
| Hydro-Gear | BDP-10A Series | Hydraulic Pumps | 51161, 50735 |
| Hydro-Gear | PE Series | Hydraulic Pumps | 51161, 50735 |
| Hydro-Gear | PG Series | Hydraulic Pumps | 51161, 50735 |
| Hydro-Gear | PJ Series | Hydraulic Pumps | 51161, 50735 |
| Hydro-Gear | PK Series | Hydraulic Pumps | 51161, 50735 |
The following brands utilize Hydro-Gear transmissions that are compatible with this seal.
| Brand | Equipment Type | OEM Part No. | Notes |
|---|---|---|---|
| Husqvarna | Various Models | 583039301 | Cross-referenced part number |
Technical Specs
- Product Type
- Hydraulic Lip Seal
- Installation
- Direct replacement
- Dimensions
- 17 x 40 x 7 mm (Inner Diameter x Outer Diameter x Width)
- Housing Material
- Polyethylene (PE)
- Housing Color
- Black
- Weight
- 0.025 kg (0.88 oz)
- Application
- For hydraulic pump shaft sealing applications
What’s in the Box
- 2 x Hydro Gear Lip Seal (Replaces 51161, 50735)
Installation Notes
- Ensure the equipment is powered off and the hydraulic system is safely depressurized before starting work.
- Thoroughly clean the area around the old seal to prevent dirt and debris from entering the pump.
- Carefully remove the worn seal with a seal puller or appropriate tool, taking care not to scratch the shaft or housing bore.
- Inspect the shaft and housing for any grooves, burrs, or wear; polish away imperfections with a fine-grit emery cloth if needed.
- Lightly lubricate the inner and outer surfaces of the new lip seal with clean hydraulic fluid.
- Position the new seal squarely over the housing opening and gently press it into place using a seal driver or a socket with a matching outer diameter. Ensure even pressure.
- Reassemble all components, refill hydraulic fluid to the correct level, and run the equipment while checking for any leaks.
Troubleshooting & FAQ
How do I know if this lip seal will fit my mower?
This seal is designed for specific Hydro-Gear pump series: BDA, BDP-10A, PE, PG, PJ, and PK. To confirm fitment, check your pump's model number and cross-reference the OEM part number. This part replaces Hydro Gear 51161, 50735, and Husqvarna 583039301.
What are the signs of a failing hydraulic seal?
The most common sign is a hydraulic fluid leak around the pump shaft. Other indicators can include a noticeable loss of transmission power, unusual whining sounds from the pump, or sluggish hydraulic performance.
How often should I replace these seals?
There is no fixed replacement interval. Seals should be replaced whenever you observe signs of leakage or damage. It is also good practice to replace them during any major transmission or pump overhaul to ensure system integrity.
Can I install this seal myself?
While DIY installation is possible for those with strong mechanical skills and the correct tools (like a seal puller and driver), we recommend professional installation. This ensures the seal is seated correctly without damaging the seal, shaft, or housing, preventing premature failure.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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