SDYB567L483 Shimadzu Forklift Tandem Gear Pump

Product Overview

The SDYB567L483, also identified in historical documentation as SDYB56.7-L483, is a Shimadzu SDY Series tandem hydraulic gear pump associated with forklift hydraulic systems, including the Komatsu FD45-7.

Shimadzu officially defines the SDY Series as a dual gear-pump assembly, rather than a conventional single pump. The SDY architecture combines an SGP2 first-stage pump with a YP15 second-stage pump. Shimadzu specifies the SGP2 range at 20–52 cm³/rev with up to 24.5 MPa rated pressure, while YP15 covers 5–16 cm³/rev with up to 20.6 MPa rated pressure.

The first SGP2 section uses a cast-iron body, while the YP15 section uses an aluminum-alloy body. This combined architecture balances high-pressure structural capability with weight and packaging considerations in mobile hydraulic equipment.

Historical forklift documentation identifies the SDYB56.7-L483 / SDYB567L483 configuration with the Komatsu FD45-7. However, Shimadzu’s current public documentation does not provide enough information to independently decode the 56.7 and L483 historical configuration into a verified individual pump displacement split. Therefore, those values are not presented as invented pump-stage specifications.

Our replacement unit is engineered around the original tandem-pump architecture, mechanical interfaces, rotation and application requirements and undergoes 100% simulated operating-condition testing to verify both pump sections under representative working conditions.

Technical Specifications

SDYB567L483

• Model: SDYB567L483
• Historical Model Format: SDYB56.7-L483
• Brand: Shimadzu
• Product Series: SDY
• Product Type: Tandem / Dual Hydraulic Gear Pump
• Application: Forklift Hydraulic System
• Documented Equipment: Komatsu FD45-7
• Pump Architecture: Two-Section Gear Pump
• SDY First Pump Platform: SGP2
• SDY Second Pump Platform: YP15
• SGP2 Displacement Range: 20–52 cm³/rev
• YP15 Displacement Range: 5–16 cm³/rev
• SGP2 Maximum Rated Pressure: 24.5 MPa
• YP15 Maximum Rated Pressure: 20.6 MPa
• Housing: SGP2 Cast Iron / YP15 Aluminum Alloy
• Control: Fixed Displacement
• Drive: Mechanical Tandem Drive
• 56.7: Historical model identifier; not treated as a verified single-pump displacement
• L483: Historical configuration code; exact field definition not independently verified from current Shimadzu public documentation
• Exact First-Pump Displacement: Not publicly verified
• Exact Second-Pump Displacement: Not publicly verified
• Exact Combined Rated Flow: Not publicly verified
• Exact Maximum Speed: Must be confirmed from the complete configuration/equipment documentation
• Weight: Not publicly verified for this exact historical configuration

Shimadzu officially confirms the SDY architecture as SGP2 + YP15.

SDYB567F1H9L483

• Model: SDYB567F1H9L483
• Historical Model Format: SDYB56.7-L483
• Brand: Shimadzu
• Product Type: Tandem Hydraulic Gear Pump
• Application: Komatsu FD45-7 Forklift
• Architecture: Dual Gear Pump Assembly
• First Pump Platform: SGP2
• Second Pump Platform: YP15
• SGP2 Displacement Range: 20–52 cm³/rev
• YP15 Displacement Range: 5–16 cm³/rev
• SGP2 Maximum Rated Pressure: 24.5 MPa
• YP15 Maximum Rated Pressure: 20.6 MPa
• Housing: SGP2 Cast Iron / YP15 Aluminum Alloy
• Control: Fixed Displacement
• F1H9L483: Historical configuration code not fully decoded by current Shimadzu public documentation
• Exact First-Pump Displacement: Not publicly verified
• Exact Second-Pump Displacement: Not publicly verified
• Exact Speed Rating: Not publicly verified
• Weight: Not publicly verified

Official Shimadzu SDY Architecture

Shimadzu’s official tandem-pump documentation defines:

SDY1

• Pump 1: SGP1
• Pump 2: YP15
• SGP1 Range: 16–36 cc
• YP15 Range: 5–16 cc
• Maximum Rated Pressure: 20.6 MPa
• Pump 1 Housing: Cast Iron
• Pump 2 Housing: Aluminum Alloy

SDY

• Pump 1: SGP2
• Pump 2: YP15
• SGP2 Range: 20–52 cc
• YP15 Range: 5–16 cc
• SGP2 Maximum Rated Pressure: 24.5 MPa
• YP15 Maximum Rated Pressure: 20.6 MPa
• Pump 1 Housing: Cast Iron
• Pump 2 Housing: Aluminum Alloy

The SDYB567L483 page should therefore be positioned as a tandem gear-pump assembly, not as a conventional single gear pump.

Key Technical Advantages

Tandem Dual-Pump Architecture

The core advantage of SDY technology is the ability to drive two independent hydraulic pump sections from one mechanical input. This allows different hydraulic circuits to receive independent flow sources within a compact installation.

High-Pressure SGP2 First Section

Shimadzu specifies SGP2 as the first-stage pump in the SDY platform, covering 20–52 cm³/rev with maximum rated pressure up to 24.5 MPa.

YP15 Auxiliary Pump Section

The second-stage YP15 covers 5–16 cm³/rev with maximum rated pressure up to 20.6 MPa, allowing a smaller auxiliary flow circuit to operate independently from the main SGP2 section.

Cast-Iron and Aluminum Construction

The first SGP2 section uses a cast-iron body while the YP15 uses an aluminum-alloy body.

This combination provides:

• High-pressure structural capability
• Reduced weight in the auxiliary section
• Compact tandem packaging
• Efficient use of mechanical drive power

Proven Forklift Application

Public forklift documentation directly associates SDYB56.7-L483 with the Komatsu FD45-7, providing a clear application reference for the model.

Integrated Mechanical Drive

Both pump sections share a common mechanical input, reducing drive-system complexity and packaging requirements compared with two separately driven pumps.

Application Areas

Komatsu FD45-7 Forklift

The clearest documented application is:

• Komatsu FD45-7
• 4.5-ton-class forklift
• Main lifting hydraulic circuit
• Tilt and auxiliary hydraulic circuits

Historical forklift documentation associates SDYB567L483 / SDYB56.7-L483 with the FD45-7.

Other Mobile Industrial Vehicles

Shimadzu officially identifies hydraulic gear-pump markets including:

• Industrial Vehicles
• Construction Machinery
• Agricultural Machinery
• Special-Purpose Vehicles

This makes the SDY platform relevant to:

• Forklifts
• Material-handling vehicles
• Mobile hydraulic machinery
• Industrial vehicles

Expert Maintenance Tips

Diagnose Both Pump Sections Separately

When the machine shows:

• Reduced lifting speed
• Auxiliary hydraulic malfunction
• Low pressure
• One hydraulic function operating normally while another is weak

Do not immediately condemn the entire tandem assembly. Measure each pump section separately for:

• Outlet pressure
• Flow
• Internal leakage
• Inlet condition

Do Not Treat 56.7 as a Single-Pump Displacement

This is an important technical and SEO distinction.

The safer description is:

SDYB56.7-L483 tandem hydraulic gear pump

rather than:

56.7 cc single gear pump

Shimadzu’s official SDY documentation confirms a two-pump architecture but does not publicly verify the displacement split of this particular historical configuration.

Verify Both Outlet Circuits

Because the two pump sections may supply different hydraulic functions, verify:

• Inlet port
• Pump 1 outlet
• Pump 2 outlet
• Port orientation
• Hose connections

Inspect the Common Drive

Since both pump sections share one mechanical input, shaft alignment and coupling condition affect both hydraulic circuits. Inspect:

• Shaft alignment
• Coupling wear
• Spline/key condition
• Axial loading
• Radial loading

Protect the Suction Circuit

A restricted suction circuit can compromise both pump sections. Check:

• Suction filter
• Reservoir oil level
• Suction hose
• Fittings
• Air leakage

Maintain Hydraulic Cleanliness

Inspect the hydraulic oil, tank, suction screen and return filter during pump replacement. Contamination from the previous pump can rapidly damage the gear sets and bearing/bushing surfaces.

Do Not Automatically Substitute SDY1

Shimadzu defines:

• SDY1 = SGP1 + YP15
• SDY = SGP2 + YP15

The first pump therefore has different displacement and pressure characteristics.

A complete SDYB567L483 replacement should consequently be matched using the complete model, shaft, ports, mounting dimensions and machine configuration.