Caterpillar 185-5918 Hydraulic Slipper Piston Pump

Product Name: Caterpillar 185-5918 Slipper Piston Pump / Hydraulic Axial Piston Pump
Model / Part Number: 185-5918
Alternative Part Number Format: 1855918
Brand: Caterpillar (Cat)
Product Category: Hydraulic Pump → Axial Piston Pump / Slipper Piston Pump

Product Details

The Caterpillar 185-5918 is a slipper piston pump, identified by Caterpillar as a variable-displacement axial piston pump. It is designed to generate hydraulic fluid flow within the machine's hydraulic system.

According to the Cat Parts Store, the pump has a 74 cm³/revolution displacement and clockwise rotation. Cat lists it for several D-Series backhoe loaders, including the 420D, 428D, 430D, 432D, 438D and 442D. (Cat Parts Store)

Key Verified Specifications

Specification	Details
Brand	Caterpillar / Cat
Part Number	185-5918
Part Number without hyphen	1855918
Pump Type	Slipper Piston Pump
Pump Design	Variable-displacement axial piston pump
Displacement	74 cm³/rev
Rotation	Clockwise
Length	13.0 in
Height	11.3 in
Compatible equipment	Cat D-Series Backhoe Loaders

The above specifications are based on Cat's published parts information. (Cat Parts Store)

Compatible Caterpillar Models

The Caterpillar Parts Store specifically lists the following compatible backhoe loader models:

• Caterpillar 420D

• Caterpillar 428D

• Caterpillar 430D

• Caterpillar 432D

• Caterpillar 438D

• Caterpillar 442D

(Cat Parts Store)

Important: Machine configuration and serial number can affect part compatibility. Confirm the machine serial number, existing pump identification and configuration before ordering.

Features

• Caterpillar slipper piston pump design

• Variable-displacement axial piston configuration

• 74 cm³/rev displacement

• Clockwise rotation

• Designed for hydraulic fluid flow generation

• Suitable for specified Cat D-Series backhoe loader applications

• Available as an OEM Cat part or compatible replacement, depending on supplier configuration

Applications

The 185-5918 hydraulic pump is used in hydraulic systems on Caterpillar backhoe loaders. It provides hydraulic flow required for machine functions and hydraulic components.

Typical application environments include:

• Construction equipment

• Earthmoving machinery

• Backhoe loaders

• Excavation applications

• Loader operations

• Hydraulic lifting and digging systems

• Equipment repair and hydraulic pump replacement

Caterpillar 185-5918 Replacement & Interchange Numbers

The following numbers are found in aftermarket/replacement-parts references:

• 185-5918

• 1855918

• CA1855918

• M1855918

• R986110056 — listed by a replacement supplier as a Bosch Rexroth replacement reference

• R986120159 — listed by a replacement supplier as a Rexroth reman replacement reference

• 10R-0533 — listed by replacement suppliers as a Cat reman reference

(Reliable Aftermarket Parts, Inc®)

Note: These interchange/replacement references should not automatically be treated as identical OEM part numbers. Verify the replacement number against the machine serial number and pump configuration before ordering.

FAQ

What is Caterpillar 185-5918?

Caterpillar 185-5918 is a slipper piston pump, categorized by Cat as a variable-displacement axial piston pump for hydraulic applications. (Cat Parts Store)

What is the displacement of 185-5918?

The Cat Parts Store specifies a displacement of 74 cm³ per revolution. (Cat Parts Store)

What direction does 185-5918 rotate?

The Cat description specifies clockwise rotation. (Cat Parts Store)

Which Caterpillar machines use 185-5918?

Cat lists the 420D, 428D, 430D, 432D, 438D and 442D backhoe loaders as compatible models. (Cat Parts Store)

Is 185-5918 a hydraulic piston pump?

Yes. It is a slipper piston pump / variable-displacement axial piston pump used in a hydraulic system. (Cat Parts Store)

Can ASIA-MECH supply Caterpillar 185-5918?

ASIA-MECH HYDRO-PNEUMATIC (M) SDN BHD can assist with sourcing the Caterpillar 185-5918 and suitable genuine or aftermarket replacement options. Availability, condition and exact replacement specification should be confirmed before ordering.

How do I confirm the correct replacement pump?

Provide the part number, machine model, machine serial number and photographs of the existing pump/nameplate. This allows the replacement configuration to be checked before quotation.

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Related Models

• Caterpillar 420D

• Caterpillar 428D

• Caterpillar 430D

• Caterpillar 432D

• Caterpillar 438D

• Caterpillar 442D

Alternative / Replacement References

• 1855918

• CA1855918

• M1855918

• 10R-0533

• R986110056

• R986120159

Verify all replacement/interchange numbers against the machine serial number and pump configuration before purchase.

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Why Buy From ASIA-MECH HYDRO-PNEUMATIC?

ASIA-MECH HYDRO-PNEUMATIC (M) SDN BHD specializes in hydraulic pumps, hydraulic motors, hydraulic valves, hydraulic cylinders and industrial hydraulic components in Malaysia.

We offer sourcing for genuine OEM and aftermarket hydraulic components, with delivery solutions for Malaysia and international destinations.

Industries served:
Manufacturing • Construction • Palm Oil Mills • Mining • Marine • OEM Machine Builders

Delivery across Malaysia:
Perlis, Penang, Kedah, Perak, Pahang, Kuala Lumpur, Selangor, Melaka, Johor, Kelantan, Kuantan, Sabah and Sarawak.

International delivery:
Malaysia • Singapore • Thailand • Indonesia • Philippines • Vietnam • Europe • Worldwide

Contact ASIA-MECH

ASIA-MECH HYDRO-PNEUMATIC (M) SDN BHD
Tel: 05-282 1518 / 016-550 2288
WhatsApp: +60 16-550 2288
Email: asiamech88@gmail.com

For quotation, please provide Caterpillar 185-5918 + machine model + serial number so compatibility can be checked.

Datasheet / Catalog / PDF: Available upon enquiry, subject to the specific product and supplier documentation.