Hydraulic Valves for Earthmoving Equipment & Yellow Plant

Hydraulic Control Valves, Valve Banks & Hydraulic Components for Heavy Machinery

TOSOG Yellow Plant Solutions supplies hydraulic valves for earthmoving equipment, construction machinery, mining equipment and yellow plant across South Africa.

We supply OEM, aftermarket, reconditioned and replacement hydraulic control valves for excavators, wheel loaders, bulldozers, motor graders, articulated dump trucks, backhoe loaders, drilling equipment and other heavy-duty machinery.

Hydraulic valves are essential to the operation of modern earthmoving equipment. They control the direction, pressure and flow of hydraulic oil, allowing operators to control functions such as lifting, digging, bucket movement, steering, travel, braking, tipping and auxiliary attachments.

TOSOG can assist with sourcing hydraulic control valves, main control valves, valve banks, directional control valves, relief valves, pilot valves, solenoid valves, proportional valves and hydraulic manifolds for a wide range of yellow plant machines.

Whether you need a CAT hydraulic valve, Komatsu hydraulic valve, Hitachi hydraulic valve, Volvo hydraulic valve, JCB hydraulic valve, Bell hydraulic valve, Doosan hydraulic valve or another earthmoving hydraulic component, provide us with the machine details and part number and our team can assist with identification and sourcing.

Hydraulic Valves for Sale in South Africa

Looking for hydraulic valves for sale in South Africa?

TOSOG supplies hydraulic valves and hydraulic control components for:

Construction equipment
Mining machinery
Earthmoving equipment
Yellow plant
Plant hire fleets
Road construction machinery
Quarry equipment
Agricultural machinery
Industrial hydraulic systems

Our hydraulic valve supply options can include:

Genuine OEM hydraulic valves
OEM-equivalent hydraulic valves
High-quality aftermarket hydraulic valves
Reconditioned hydraulic valves
Used hydraulic valves
Complete hydraulic valve banks
Individual valve sections
Hydraulic manifolds
Pilot control valves
Solenoid valves
Pressure control valves
Flow control valves
Directional control valves

TOSOG’s existing hydraulic spares range includes directional, pressure and flow-control valves for heavy-duty hydraulic applications.

What Is a Hydraulic Valve?

A hydraulic valve is a mechanical or electro-hydraulic component used to control hydraulic fluid within a machine’s hydraulic system.

Depending on its design, a hydraulic valve can control:

Hydraulic oil direction
Hydraulic oil flow
System pressure
Actuator speed
Load holding
Hydraulic circuit sequencing
Machine functions
Auxiliary attachments

Hydraulic valves work together with hydraulic pumps, hydraulic motors, hydraulic cylinders, filters, hoses and electronic controls to create the complete hydraulic system.

A correctly matched hydraulic valve is therefore essential for maintaining machine performance, operator control and hydraulic system efficiency.

Types of Hydraulic Valves We Supply

1. Hydraulic Directional Control Valves

Directional control valves determine where hydraulic oil flows within a hydraulic circuit.

Applications include:

Boom control
Arm control
Bucket control
Blade control
Steering
Travel
Lift functions
Tilt functions
Auxiliary attachments

2. Hydraulic Main Control Valves

The main control valve (MCV) or main hydraulic control valve is one of the most important components on an excavator or other hydraulic machine.

It distributes hydraulic oil from the pump to different machine functions.

TOSOG can source:

Excavator main control valves
Loader main control valves
Dozer control valves
Valve banks
Multi-section control valves
Main valve assemblies
Replacement valve sections

3. Hydraulic Valve Banks

A hydraulic valve bank consists of multiple valve sections assembled together to control several hydraulic functions.

Valve banks are commonly found on:

Excavators
Wheel loaders
Bulldozers
Graders
ADTs
Cranes
Agricultural machinery
Industrial hydraulic systems

TOSOG supplies valve banks and hydraulic control assemblies for various heavy machinery brands, including applications for Komatsu, Kobelco and Terex equipment.

4. Pressure Control Valves

Pressure control valves regulate hydraulic system pressure and help protect hydraulic components.

Common types include:

Relief valves
Pressure reducing valves
Sequence valves
Counterbalance valves
Pressure regulating valves

5. Flow Control Valves

Flow control valves regulate the quantity of hydraulic oil moving through a circuit.

Applications include controlling:

Cylinder speed
Motor speed
Auxiliary hydraulic functions
Hydraulic attachment flow

6. Pilot Control Valves

Pilot valves control hydraulic functions using lower-pressure pilot circuits.

They are commonly used on modern excavators and other heavy machinery where precise machine control is required.

7. Solenoid Hydraulic Valves

Solenoid valves use electrical signals to control hydraulic functions.

They are commonly integrated with:

ECU systems
Machine controllers
Joysticks
Sensors
Electro-hydraulic control systems

8. Proportional Hydraulic Valves

Proportional valves provide variable hydraulic control rather than simply switching a hydraulic circuit on or off.

They are used where precise control of:

Speed
Pressure
Flow
Movement

is required.

Hydraulic Valve Models & Part Numbers

TOSOG can source hydraulic valves according to machine model, serial number, OEM part number or hydraulic valve identification.

Examples of hydraulic control valve requirements include:

Caterpillar / CAT

Common applications include:

CAT excavator hydraulic control valves
CAT wheel loader control valves
CAT bulldozer control valves
CAT motor grader hydraulic valves
CAT ADT hydraulic valves
CAT pilot control valves
CAT main control valves

Komatsu

TOSOG supplies and sources Komatsu hydraulic control valves, including identified part numbers such as:

709-14-93500 – Komatsu Control Valve
709-15-94000 – Komatsu Control Valve

These are examples of hydraulic control valve products currently represented within TOSOG’s catalogue.

Applications include:

Komatsu PC-series excavators
Komatsu WA-series wheel loaders
Komatsu D-series dozers
Komatsu mining equipment

Hitachi

Hydraulic valve applications include:

Hitachi ZX excavators
Hitachi EX excavators
Hitachi wheel loaders
Mining excavators

Volvo

Hydraulic control valves can be sourced for:

Volvo EC excavators
Volvo L-series wheel loaders
Volvo A-series articulated dump trucks
Volvo construction equipment

Bell Equipment

Hydraulic valve applications include:

Bell articulated dump trucks
Bell wheel loaders
Bell graders
Bell earthmoving equipment

JCB

Applications include:

JCB excavators
JCB backhoe loaders
JCB wheel loaders
JCB construction machinery

Doosan / DEVELON

Applications include:

Doosan DX excavators
Doosan wheel loaders
DEVELON excavators
DEVELON construction equipment

Kobelco

Applications include:

Kobelco SK excavators
Kobelco hydraulic excavators
Kobelco mining equipment

Liebherr

Applications include:

Liebherr R-series excavators
Liebherr L-series wheel loaders
Liebherr mining equipment
Liebherr hydraulic systems

TOSOG also maintains dedicated product and sourcing pages for Liebherr control valves.

Hydraulic Valves for Excavators

Excavator hydraulic valves are responsible for distributing hydraulic oil to the machine’s major functions.

Typical excavator hydraulic valve applications include:

Boom
Arm
Bucket
Swing
Travel
Auxiliary hydraulics
Blade
Pilot circuits

A faulty excavator main control valve can result in symptoms such as:

Slow hydraulic movement
Jerky operation
Loss of hydraulic power
Hydraulic overheating
Internal leakage
Excessive pressure
Poor response
One function not operating correctly

TOSOG can assist with excavator hydraulic valve replacement, sourcing and identification.

Hydraulic Valves for Wheel Loaders

Wheel loaders depend on hydraulic control valves to operate:

Lift arms
Buckets
Tilt cylinders
Steering systems
Auxiliary hydraulic circuits

We supply and source hydraulic valves for wheel loaders from major manufacturers including:

Hydraulic Valves for Bulldozers

Bulldozer hydraulic valves control functions such as:

Blade lift
Blade tilt
Ripper operation
Steering
Implement hydraulics

TOSOG can assist with sourcing replacement hydraulic valves for crawler dozers and mining bulldozers.

Hydraulic Valves for Motor Graders

Motor graders use hydraulic valves to control:

Blade lift
Blade tilt
Circle drive
Wheel lean
Articulation
Steering
Scarifier and ripper functions

We supply hydraulic components for major motor grader brands and models.

Hydraulic Valve Manufacturers & Brands

TOSOG supports hydraulic valve requirements for equipment manufactured by leading earthmoving and construction machinery manufacturers.

Earthmoving Equipment Brands

Caterpillar / CAT
Komatsu
Hitachi
Volvo Construction Equipment
Bell Equipment
JCB
Doosan
DEVELON
Hyundai
Liebherr
Kobelco
Case
John Deere
SANY
XCMG
Terex
SEM

TOSOG’s wider earthmoving parts network covers major brands including Caterpillar, Komatsu, Bell, Hitachi and Volvo.

Hydraulic Component Manufacturers

Depending on the application, hydraulic valve requirements may involve manufacturers such as:

Kawasaki
Parker
Bosch Rexroth
Eaton
Danfoss
Hydac
Yuken
Nachi
KYB
Hengli
Sun Hydraulics

Availability depends on the machine, hydraulic system and required specification.

OEM vs Aftermarket vs Reconditioned Hydraulic Valves

OEM Hydraulic Valves

OEM valves are manufactured according to the original machine manufacturer’s specifications.

They are suitable when exact specification and original fitment are required.

Aftermarket Hydraulic Valves

Quality aftermarket valves can provide an alternative to OEM components where compatibility and specifications are correctly matched.

They can be particularly useful for fleet maintenance and cost management.

Reconditioned Hydraulic Valves

Depending on the valve condition, some hydraulic control valves can be professionally reconditioned.

Possible work may include:

Cleaning
Inspection
Spool inspection
Seal replacement
Component replacement
Pressure testing
Functional testing

The suitability of reconditioning depends on the condition and design of the valve.

How to Identify the Correct Hydraulic Valve

Before ordering a hydraulic valve, provide as much information as possible.

Required Information

1. Machine manufacturer

Example:

CAT, Komatsu, Bell, Volvo, Hitachi or JCB.

2. Machine model

Example:

PC400, WA480, 966L, A35D or ZX350.

3. Serial number

The serial number is extremely important because specifications can change during a machine’s production period.

4. Hydraulic valve part number

Provide the number stamped, engraved or shown on the valve identification plate.

5. Photographs

Clear photographs of the valve from multiple angles can help with identification.

6. Hydraulic system information

Where available, provide:

Hydraulic pump model
System pressure
Flow rate
Valve configuration
Pilot pressure
Number of sections

Common Hydraulic Valve Problems

Slow Hydraulic Functions

Possible causes can include:

Valve wear
Internal leakage
Hydraulic pump problems
Contaminated oil
Blocked filters
Incorrect pressure settings

Jerky Machine Movement

Possible causes include:

Spool problems
Contamination
Air in the hydraulic system
Incorrect pressure
Damaged seals
Hydraulic pump problems

Hydraulic Oil Overheating

Potential causes include:

Internal valve leakage
Incorrect pressure settings
Restricted flow
Hydraulic pump problems
Contaminated components

One Hydraulic Function Not Working

Possible causes include:

Damaged spool
Pilot pressure problem
Solenoid failure
Blockage
Electrical control fault
Internal valve damage

Important: Hydraulic symptoms can have multiple causes. Replacing the valve without properly identifying the underlying problem can result in unnecessary costs.

Tips for Buying Hydraulic Valves

1. Always provide the machine serial number

The same machine model can have different hydraulic configurations.

2. Check the part number

Compare the number on the existing valve with the replacement part.

3. Do not select a valve based only on appearance

Two hydraulic valves can look similar but have different:

Pressure ratings
Flow capacities
Port configurations
Spool configurations
Control systems

4. Confirm hydraulic pressure and flow

The replacement valve must be compatible with the hydraulic pump and system specifications.

5. Check the control configuration

Confirm whether the valve is:

Manual
Pilot-operated
Hydraulic
Solenoid-operated
Electro-hydraulic
Proportional

6. Keep hydraulic oil clean

Hydraulic contamination is a major threat to valves, pumps, motors and cylinders.

7. Replace hydraulic filters as recommended

A contaminated filter can allow damaging particles to circulate through the hydraulic system.

8. Investigate the cause of valve failure

If a valve fails repeatedly, check the hydraulic pump, oil contamination, pressure settings and other system components.

Why Choose TOSOG for Hydraulic Valves?

TOSOG Yellow Plant Solutions provides hydraulic and earthmoving equipment parts for demanding construction, mining, plant hire and industrial applications.

Our Hydraulic Valve Solutions Include:

✔ OEM hydraulic valves
✔ Aftermarket hydraulic valves
✔ Reconditioned hydraulic valves
✔ Used hydraulic valves
✔ Main control valves
✔ Hydraulic valve banks
✔ Directional control valves
✔ Pressure control valves
✔ Flow control valves
✔ Pilot valves
✔ Solenoid valves
✔ Proportional valves
✔ Hydraulic manifolds
✔ Valve sections and components

We can assist with part-number identification, cross-referencing and sourcing for difficult-to-find hydraulic components.

Hydraulic Valves for Mining Equipment

Mining machinery operates in some of the most demanding environments.

Hydraulic valves may be exposed to:

High operating hours
Heavy loads
Dust
Vibration
High temperatures
Hydraulic contamination
Continuous duty cycles

TOSOG supplies hydraulic solutions for mining and heavy earthmoving applications where equipment uptime is critical.

Hydraulic Valves for Plant Hire Equipment

Plant hire companies need reliable replacement components to minimise machine downtime.

TOSOG can assist plant hire operators with hydraulic valves for:

Excavators
TLBs
Wheel loaders
ADTs
Graders
Dozers
Rollers
Compactors

We can assist with both individual replacement components and larger fleet requirements.

South Africa Hydraulic Valve Supplier

TOSOG supplies hydraulic and earthmoving equipment components to customers across South Africa.

Our sourcing network supports requirements in:

Gauteng
Mpumalanga
Limpopo
North West
KwaZulu-Natal
Free State
Eastern Cape
Western Cape
Northern Cape

We also support mining, construction, engineering and plant-hire customers with broader yellow plant spare parts requirements.

Request a Hydraulic Valve Quote

Looking for a hydraulic valve for sale, excavator hydraulic valve, hydraulic control valve, main control valve, hydraulic valve bank or yellow plant hydraulic spare?

Send TOSOG:

Machine Make:
Machine Model:
Serial Number:
Hydraulic Valve Part Number:
Quantity Required:
Photos:
Location:

Our team can assist with identifying and sourcing the correct hydraulic valve for your machine.

Get a Hydraulic Valve Quote Today

Frequently Asked Questions – Hydraulic Valves

What is a hydraulic valve used for?

A hydraulic valve controls the flow, direction and pressure of hydraulic oil within machinery. It allows hydraulic cylinders and motors to perform controlled movements.

Do you supply hydraulic control valves for excavators?

Yes. TOSOG supplies and sources hydraulic control valves and valve banks for excavators and other earthmoving equipment.

Do you supply hydraulic valve banks?

Yes. TOSOG can source complete hydraulic valve banks as well as individual valve sections, depending on the machine and application.

Can you supply CAT hydraulic valves?

Yes. TOSOG can assist with sourcing hydraulic valves for Caterpillar construction and mining equipment. Provide the machine model, serial number and valve part number where available.

Can you supply Komatsu hydraulic valves?

Yes. TOSOG supplies and sources Komatsu hydraulic control valves, including model-specific and part-number-based requirements. Existing TOSOG catalogue examples include 709-14-93500 and 709-15-94000.

Do you supply aftermarket hydraulic valves?

Yes. Depending on the application, OEM-equivalent and aftermarket hydraulic valve options may be available.

Can hydraulic control valves be reconditioned?

Some hydraulic valves can be reconditioned depending on their condition, design and availability of replacement components.

How do I find the correct hydraulic valve?

The best information to provide is the machine make, model, serial number, hydraulic valve part number and photographs.

Why is my excavator hydraulic valve not working?

A hydraulic function problem does not necessarily mean the valve itself has failed. Hydraulic pumps, pilot circuits, electrical controls, filters, hoses, contamination and pressure settings can also cause similar symptoms.

Do you supply hydraulic valves in South Africa?

Yes. TOSOG supplies and sources hydraulic and earthmoving equipment components for customers across South Africa.

Can you source a hard-to-find hydraulic valve?

Yes. TOSOG can assist with part-number identification, cross-referencing and sourcing of hard-to-find hydraulic components.

Do you supply other hydraulic components?

Yes. TOSOG’s hydraulic range also includes hydraulic pumps, hydraulic motors, hydraulic cylinders, hoses, fittings and other hydraulic components.