Shimadzu Style YP Series Gear Pump | YP10-25L421 YP10-17R420 | Forklift Parts

LIC Hydraulic specializes in the YP Series, the industry standard for Forklift Truck hydraulic gear pumps. Covering the YP10 and YP15 frames, this series is engineered to meet the demanding duty cycles of material handling equipment. Models such as YP10-25L421 and YP10-17R420 feature high-tensile aluminum bodies and pressure-balanced bushings. These pumps are designed to deliver a steady flow for mast lifting and steering under pressures up to $21\text{ MPa}$ ($3045\text{ PSI}$). Known for their durability and “drop-in” compatibility, the YP series is the first choice for maintaining brands like Toyota, Mitsubishi, Linde, and TCM.

Technical Specifications (Bulleted List)

• Series: YP10 (Small) / YP15 (Medium).

• Displacements: From $2.0\text{ cc/rev}$ up to $31.5\text{ cc/rev}$.

• Max Pressure: Continuous $210\text{ bar}$, Peak up to $250\text{ bar}$.

• Efficiency: High volumetric efficiency maintained by floating side plates.

• Standard Mounting: Two-bolt rhombic flanges and splined shafts specific to forklift engines.

Key Technical Advantages

• Precision Gear Profile: Reduced flow ripple leads to smoother mast movements and quieter operation in warehouse environments.

• Robust Aluminum Housing: Provides excellent heat dissipation and high structural integrity without adding excessive weight to the hydraulic pack.

• Sealing Excellence: Equipped with heavy-duty shaft seals that resist high back-pressures, ensuring long-term leak-free performance.

• Ease of Replacement: Fully interchangeable with original Shimadzu components, ensuring minimal downtime during forklift servicing.

Application Areas

• Mast Hydraulics: Main power source for mast lifting and tilting cylinders.

• Power Steering: Providing reliable flow for full hydraulic steering units.

• Hydraulic Attachments: Powering clamps, side-shifters, and rotators.

Expert Maintenance Tips

• Prime the Pump: Always pre-fill the pump with clean hydraulic oil before initial startup. A dry start can cause immediate scoring of the aluminum wear plates.

• Seal Integrity: If you notice oil leakage from the shaft, check the engine’s drive alignment. Misalignment is the primary cause of premature shaft seal failure.

• Cleanliness Matters: Maintain an oil cleanliness level of $ISO\text{ 19/17/14}$. Since these pumps have precision internal tolerances, fine dust particles from warehouse environments can lead to internal wear and loss of lifting power.