• Series 700 Brake Cylinders
    Regular price £44.94
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    Series 700 Brake Cylinders

    Key Features

    • Application: Hydraulic brake actuation for agricultural ; mobile equipment
    • Rod options: Ø25 mm ; Ø30 mm variants
    • Working pressure: 200 bar nominal ; 250 bar max
    • Speed: 0.5 m/s
    • Temperature range: -25 °C to +80 °C
    • Notes: Fork rod end versions suit bogie braking linkages
    Regular price £44.94
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    • Order by 3pm for Next Day Delivery
  • Scanreco Filter Element - Approved Hydraulics Limited
    Regular price £39.90
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    • Delivery to UK & Ireland

    Scanreco Filter Element

    Key Features

    • Type: replacement filter element
    • Fit: scanreco filter housing for servo ; hydraulic circuit
    • Micron rating: per element specification
    • Service: planned maintenance part
    • Use: restore filtration performance
    Regular price £39.90
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    • Order by 3pm for Next Day Delivery
  • Series 630 Top Link Cylinders - Approved Hydraulics Limited
    Regular price £306.04
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    Series 630 Top Link Cylinders

    Key Features

    • Use: Heavy duty top link with quick hitch and rear ball joint
    • Example size: 80 mm bore / 40 mm rod / 200 mm stroke
    • Tractor class: For medium and large tractors
    • Supply: Complete with hoses
    • Mounting: Three-point hitch ; quick coupler compatible
    Regular price £306.04
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    • Order by 3pm for Next Day Delivery
  • Series 620 Top Link Cylinders - Approved Hydraulics Limited
    Regular price From £331.32
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    Series 620 Top Link Cylinders

    Key Features

    • Use: Hydraulic top link for medium ; large tractors
    • Bore ; rod range: 60/35 mm up to 100/45 mm options
    • Rated pressure: 200 bar typical ; 250 bar max
    • Check valve: Often supplied with double pilot operated check for position holding
    • Supply: Complete with hoses
    • Applications: Implements angle control ; hitch adjustment
    Regular price From £331.32
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  • Adam Hindle

    Sales Director

    I began my engineering career at Stockport College in around 2005, first completing a National Diploma in Electrical Engineering, followed by a Higher National Diploma in Mechanical Engineering. I then progressed to the University of Salford, where I earned a BEng (Hons) degree in Mechanical Engineering.

    After graduating, I started my professional career with Approved Hydraulics. I initially gained a combination of hands-on workshop experience and telephone-based sales experience. In later years, I moved into a full-time sales role and led the new crane and excavator attachments department that the company had recently established.

  • Series 610 Top Link Cylinders
    Regular price From £170.44
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    Series 610 Top Link Cylinders

    Key Features

    • Use: Hydraulic top link for small ; medium tractors
    • Bore ; rod options: 50/30 mm ; 60/35 mm ; 80/40 mm
    • Stroke options: 160 mm ; 210 mm ; 280 mm
    • Pin sizes: Ø19.3 mm ; Ø25.4 mm depending on build
    • Supply: Delivered complete with hoses
    • Mounting: Three-point hitch top link replacement
    Regular price From £170.44
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydra Part Double Acting Cylinder 70mm Bore Rams - Approved Hydraulics
    Regular price From £164.75
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    Double Acting Hydraulic Cylinder 90mm Bore Rams

    Key Features

    • Bore: 90 mm
    • Rod: 50 mm
    • Pin hole: 30 mm
    • Max working pressure: 250 bar
    • Max speed: 0.5 m/s
    • Temperature range: -25 °C to +80 °C
    • Type: Double acting welded cylinder for mobile hydraulics
    Regular price From £164.75
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  • HF6 Flail Hammers (T11, T13REV, T15REV)
    Regular price £40.84
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    HF6 Flail Hammers (T11, T13REV, T15REV)

    Key Features

    • Compatibility: t11 ; t13 rev ; t15 rev
    • Rotor family: heavy fr series
    • Construction: forged hammer body ; hardened edge
    • Applications: dense brush ; light timber
    • Mounting: bolt-on with bush; maintain set balance
    Regular price £40.84
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HF15 Flail Hammers
    Regular price £85.26
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    HF15 Flail Hammers

    Key Features

    • Compatibility: fr-series rotors heavy
    • Material: forged ; heat treated
    • Mounting: through-bolt ; bush
    • Use: heavier brushwork ; light wood
    • Note: replace in balanced pairs across rotor
    Regular price £85.26
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HF14 Flail Hammers - Approved Hydraulics Limited
    Regular price £91.42
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    HF14 Flail Hammers

    Key Features

    • Compatibility: fr-series rotors medium-heavy
    • Material: forged ; heat treated
    • Mounting: through-bolt ; bush
    • Use: general roadside maintenance
    • Note: verify hammer code stamped on body
    Regular price £91.42
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HF17 Flail Hammers
    Regular price £44.50
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    HF17 Flail Hammers

    Key Features

    • Compatibility: heavy fr rotors for large heads
    • Construction: forged steel hammer with replaceable bush
    • Mounting: bolt kit included
    • Use: dense scrub ; small timber
    • Balance: replace in sets to maintain rotor balance
    Regular price £44.50
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • HF7-HF8  Flail Hammers (For FR70, FR90 & FR105 Models)
    Regular price £44.50
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    • Delivery to UK & Ireland

    HF7-HF8 Flail Hammers (For FR70, FR90 & FR105 Models)

    Key Features

    • Compatibility: fr70 ; fr90 ; fr105 rotors
    • Fitment: bolt-on with through-pin and bush
    • Use: coarse brush ; woody growth
    • Material: forged ; heat treated
    • Notes: choose hf7 or hf8 per rotor ; balance set changeover
    Regular price £44.50
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T9 (FR & MZ) Flail Spares - Approved Hydraulics Limited

    POA

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    T9 (FR & MZ) Flail Spares

    Key Features

    • Compatibility: t9 heads with fr ; mz rotors
    • Typical items: hammer kits ; knives ; belts ; bearings ; seals
    • Rotor notes: fr heavy hammer rotor ; mz grass/knife rotor
    • Widths: 105 cm ; 125 cm heads
    • Check: confirm rotor type ; lug spacing before order

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • T7 Flail Spares - Approved Hydraulics Limited

    POA

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    • Delivery to UK & Ireland

    T7 Flail Spares

    Key Features

    • Compatibility: t7 5.0-8.0 t excavator heads
    • Typical items: hammer sets ; belts ; roller kits ; group 3 motors 22 ; 27 ; 34 cc
    • Widths: 105 cm ; 125 cm heads
    • Note: verify rotor code ; motor displacement when ordering
    • Service: oem quality parts and kits available

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • HF3 Flail Hammers
    Regular price £26.94
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    • Delivery to UK & Ireland

    HF3 Flail Hammers

    Key Features

    • Compatibility: t7 ; t9 rev heads
    • Rotor families: fr70 ; fr90 ; fr105 where fitted
    • Construction: forged ; heat treated
    • Mounting: bolt-on with through-pin and bush
    • Use: coarse vegetation ; roadside scrub
    Regular price £26.94
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Rotator Hose Guards - Approved Hydraulics Limited
    Regular price From £36.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

    Rotator Hose Guards

    Key Features

    • Function: heavy duty arched protector for rotator hoses
    • Compatibility: sized to specific GR/GRS/GR..DB models
    • Mounting: bolts to upper stator plate
    • Benefit: deflects debris; reduces hose snag/fatigue
    • Material: steel fabrication; serviceable components
    Regular price From £36.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Filler Breather for Hydraulics Oil Tanks - Approved Hydraulics Limited
    Regular price £20.04
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    • Delivery to UK & Ireland

    Filler Breather for Hydraulics Oil Tanks

    Key Features

    • Type: Filler breather assembly for hydraulic reservoirs
    • Filtration options: 3 µm ; 10 µm ; 40 µm elements
    • Mounting: Threaded ; bayonet ; or 3-hole flange variants
    • Strainer: Optional tank neck strainer ; coarse mesh
    • Materials: Metal cap with polymer or alloy body ; nitrile seal
    • Use: Vent ; fill point and contamination control for hydraulic tanks
    Regular price £20.04
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Scanreco Remote Control Blanking Plate - Approved Hydraulics Limited
    Regular price £21.46
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    • Delivery to UK & Ireland

    Scanreco Remote Control Blanking Plate

    Key Features

    • Notes: Original Scanreco Product
    • Use case: Blanking cover plate for unused mounting/connector on Scanreco remote control
    • Brand: Scanreco
    • Notes: Specification information is limited in source listing; confirm dimensions and compatibility before purchase
    • Notes: Details not stated
    Regular price £21.46
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydraulics Oil Tank Return Filter Element
    Regular price From £19.98
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    • Delivery to UK & Ireland

    Hydraulics Oil Tank Return Filter Element

    Key Features

    • Type: hydraulic return filter element
    • Media: cellulose or microglass options depending on series
    • Micron rating: commonly 10 or 25 classes available
    • Service: replaceable element for tank return filter housings
    • Use: maintain ISO cleanliness targets in hydraulic circuits
    Regular price From £19.98
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Hydraulics Oil Tank Return Filters (Complete with Housing) - Approved Hydraulics Limited
    Regular price From £36.06
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    • Delivery to UK & Ireland

    Hydraulics Oil Tank Return Filters (Complete with Housing)

    Key Features

    • Type: tank top return line filter housing
    • Function: removes contaminants before oil returns to reservoir
    • Options: bypass valve and clogging indicator ports per series
    • Media: accepts cellulose or microglass elements at set micron ratings
    • Use: protect pumps and valves by maintaining fluid cleanliness
    Regular price From £36.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Seal Kit For Hydra Part MR Motor (Zi) - Approved Hydraulics Limited

    POA

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    Motor Seal Kits (ZHE Model)

    Key Features

    • Compatibility: Hydra Part orbital motors ; ZHE model
    • Motor series: MR ; MV
    • Function: Service kit to renew shaft and housing seals ; restore leak tightness
    • Intended fluid: Mineral hydraulic oils to ISO 11158 HM ; HLP
    • Typical maintenance: Replace aged O-rings ; shaft seal when oil leakage or dust ingress occurs
    • Applications: Orbital motors on mobile equipment ; agricultural implements ; conveyors

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • T5 Flail Spares - Approved Hydraulics Limited

    POA

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    • Delivery to UK & Ireland

    T5 Flail Spares

    Key Features

    • Compatibility: t5 4.0-6.0 t excavator heads
    • Typical items: hammer kits ; group 3 gear motors 22 ; 27 ; 34 cc ; belts
    • Rotor: helical with austempered hammers
    • Note: confirm rotor and motor code before order
    • Fasteners: hammer bolts ; lock nuts ; bushes supplied as kits

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • HF2 Flail Hammers - Approved Hydraulics Limited
    Regular price £21.46
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    • Delivery to UK & Ireland

    HF2 Flail Hammers

    Key Features

    • Compatibility: t7 ; t9 heads
    • Tool type: heavy hammer ; fits fr70 rotors
    • Mounting: bolt-on; hardened bushings
    • Use: heavier brush ; light wood
    • Edge profile: beak/axe style for bite in woody growth
    Regular price £21.46
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T3 Flail Spares - Approved Hydraulics Limited

    POA

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    • Delivery to UK & Ireland

    T3 Flail Spares

    Key Features

    • Compatibility: t3 1.5-5.0 t excavator heads
    • Typical items: hammers ; belts ; end bearings ; roller kits ; motor seals
    • Widths: 70 cm ; 90 cm ; 105 cm options
    • Note: spec varies by rotor ; supply p/n for exact match
    • Bearings: double-row spherical rotor bearings available

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice
  • T1 Rev Flail Spares - Approved Hydraulics Limited

    POA

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    • Delivery to UK & Ireland

    T1 Rev Flail Spares

    Key Features

    • Compatibility: t1 rev 1.0-3.0 t excavators
    • Typical items: hammers ; knife sets ; belts ; bearings ; shaft seals
    • Rotor widths: 60 cm ; 70 cm ; 80 cm options
    • Note: verify serial no. ; rotor code before ordering
    • Bearings: double-row spherical rotor bearings available

    POA

    • Large UK Stock
    • 1 Year Limited Manufacturers Warranty
    • Bespoke Technical Advice

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Common Calculations FAQs

Calculating force, speed, pressure, power, and efficiency in hydraulic applications.

How do you calculate actuator speed?

Actuator speed is determined by flow rate and cross-sectional area:

Speed = Flow rate ÷ Area

Flow rate is the volume of fluid delivered (in L/min or GPM).

Area is the cross-sectional area of the actuator piston: π × (diameter ÷ 2)².

How do you calculate cylinder force?

Cylinder force can be calculated using:

Force = Pressure × Area

Pressure is the system pressure (in psi or bar).

Area is the cross-sectional area of the cylinder bore (in square inches or square centimeters).

Area = π × (bore diameter ÷ 2)².

How do you calculate pressure drop across a valve?

Pressure drop can be calculated using the valve flow coefficient (Cv):

Pressure Drop (ΔP) = (Flow Rate)² ÷ (Cv² × Fluid Density)

Flow Rate is the fluid flow (in GPM or L/min).

Cv is the valve flow coefficient.

Fluid Density is the density of the hydraulic fluid.

How do you size an accumulator?

Accumulator sizing considers required flow, pressure, and pre-charge:

Accumulator Volume = Flow Rate × Time ÷ Pressure

This determines how much fluid must be stored to maintain system pressure.

How to convert psi to bar?

Use the conversion factor: 1 bar = 14.5 psi.

To convert psi to bar, divide psi by 14.5.

Example: 200 psi ÷ 14.5 = 13.79 bar.

What is pre-charge pressure in an accumulator?

Pre-charge pressure is the initial gas pressure in the accumulator before fluid enters.

It helps maintain system pressure as the accumulator discharges.

Typically set to 70–80% of system operating pressure.

What is specific gravity of hydraulic fluid?

Specific gravity is the ratio of hydraulic fluid density to water.

A value of 1 means equal density.

Less than 1 means the fluid floats; greater than 1 means it sinks.

What is torque in a hydraulic motor?

Torque is the rotational force produced based on system pressure and motor displacement:

Torque = Pressure × Displacement ÷ 2π

Pressure is the operating system pressure.

Displacement is the volume displaced per revolution (in cubic inches or cubic centimeters).

What unit is hydraulic power measured in?

Hydraulic power is measured in horsepower (HP) or kilowatts (kW).

Hydraulic horsepower can be calculated using:

HP = (Pressure (psi) × Flow rate (GPM)) ÷ 1714.

What’s the relationship between pump speed and flow?

Flow rate is directly proportional to pump speed.

If pump speed doubles, flow rate doubles (assuming constant displacement).

This is important when adjusting flow or selecting a pump for varying speeds.