• 1/2" Cylinder Breather
    Regular price £17.82
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    1/2" Cylinder Breather

    Key Features

    • Thread: 1/2" NPT
    • Function: vents cylinder while filtering intake air
    • Benefit: balances pressure; reduces moisture and dust ingress
    • Element: integrated breather element (high-flow)
    • Use: hydraulic cylinders; small reservoirs
    Regular price £17.82
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  • T1 KF1 Blades - Sold Individually
    Regular price £8.89
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    T1 KF1 Blades - Sold Individually

    Key Features

    • Compatibility: t1 head
    • Type: kf1 cutting blade
    • Sale: sold individually
    • Use: grass ; hedging
    • Application: hydraulic attachment component
    Regular price £8.89
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    • Order by 3pm for Next Day Delivery
  • TF ISUZU MZW6P; 3 EIXOS; COMANDO PNEUMATICO; C/ SE - Approved Hydraulics Limited
    Regular price £479.24
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    PTO ISUZU MYY-5T MECHANIC CONTROL

    Key Features

    • Gearbox compatibility: Isuzu MYY‑5T
    • Control: mechanical (lever/cable)
    • PTO ratio: 1.1
    • ABER reference: TF3008M
    • Mounting: side‑mount PTO aperture
    • Pump interface: UNI/ISO direct‑mount
    • Sensor: on/off sensor option available
    Regular price £479.24
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    • Order by 3pm for Next Day Delivery
  • TF ISUZU MZW6P; 3 EIXOS; COMANDO PNEUMATICO; C/ SE - Approved Hydraulics Limited
    Regular price £485.66
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    ABER ISUZU PTO; MYY - 5T ; MYY - 6S ; MYY-6P ; MOH25 ; MOH30 ; MOY-9K; 1:1; Vacuum

    Key Features

    • Gearbox compatibility: MYY‑5T/MYY‑6S/MYY‑6P/MOH25/MOH30/MOY‑9K
    • Control: vacuum
    • PTO ratio: 1.1
    • ABER reference: TF3008V series
    • Mounting: side‑mount to Isuzu gearbox PTO aperture
    • Pump interface: UNI/ISO direct‑mount
    • Sensor: on/off sensor option available
    Regular price £485.66
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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.

  • TF ISUZU MZW6P; 3 EIXOS; COMANDO PNEUMATICO; C/ SE - Approved Hydraulics Limited
    Regular price £508.97
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    PTO ISUZU MZZ-6F; MECHANIC CONTROL

    Key Features

    • Gearbox compatibility: ISUZU MZZ-6F
    • Control: mechanical actuation (lever/cable)
    • ABER reference: TF3010M
    • Mounting: PTO aperture on MZZ-6F transmission
    • Pump interface: direct-mount UNI/ISO pattern
    • Use: drives hydraulic pump for mobile equipment
    • Option: sensor-ready port (variant dependent)
    Regular price £508.97
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • TF ISUZU MZW6P; 3 EIXOS; COMANDO PNEUMATICO; C/ SE - Approved Hydraulics Limited
    Regular price £529.92
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    PTO ISUZU MZZ-6F PNEUMATIC CONTROL W/SENSOR

    Key Features

    • Gearbox compatibility: ISUZU MZZ-6F
    • Control: pneumatic actuation
    • Sensor: supplied (with sensor)
    • ABER reference: TF3010PS
    • Mounting: PTO aperture on MZZ-6F transmission
    • Pump interface: UNI/ISO direct-mount
    • Use: tipper/crane/truck hydraulic systems
    Regular price £529.92
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  • M5 x 150 Cap head bolt
    Regular price £2.21
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    M5 x 150 Cap head bolt

    Key Features

    • Fastener type: socket cap screw
    • Thread: metric M5
    • Length: 150 mm
    • Drive: internal hex for controlled tightening
    • Use: hydraulic assemblies; covers; brackets
    Regular price £2.21
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  • PTO ZF S6-36 C.P. (RATIO 1:1,32)
    Regular price £365.05
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    PTO ZF S6-36 C.P. (RATIO 1:1,32)

    Key Features

    • Product code: TF4014AMP
    • Gearbox compatibility: ZF S6-36; ZF 6S-850; ZF 6S-700
    • PTO internal ratio: 1 to 1.32
    • Control: Pneumatic shift; air connection
    • Continuous torque: 300 Nm
    • Intermittent torque: 420 Nm
    • Power at 1000 rpm: 32 kW
    • Mounting position: Rear mount
    • Pump rotation: Right hand
    • Weight: 7.5 kg; sensor option available
    Regular price £365.05
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    • Order by 3pm for Next Day Delivery
  • Key 14x9x70 2R - Approved Hydraulics Limited
    Regular price £3.42
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    Key 14x9x70 2R

    Key Features

    • Profile: parallel key 14 x 9 x 70 mm
    • Ends: double radius (2R) for easier insertion
    • Function: positive torque transmission between shaft and hub
    • Use: keying cone splitter drive components
    • Material: alloy steel key stock
    Regular price £3.42
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    • Order by 3pm for Next Day Delivery
  • 75 x 2 locking nut - Approved Hydraulics Limited
    Regular price £132.06
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    75 x 2 locking nut

    Key Features

    • Thread: M75 x 2
    • Type: precision locking nut for spindle/bearing retention
    • Use: secures bearing preload and resists vibration loosening
    • Application: cone splitter hub/shaft assemblies
    • Material: high strength steel construction
    Regular price £132.06
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    • Order by 3pm for Next Day Delivery
  • TE100REV/T9 Drive Belt - Approved Hydraulics Limited
    Regular price £31.26
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    TE100REV/T9 Drive Belt

    Key Features

    • Compatibility: te100rev ; t9 heads
    • Type: drive belt
    • Notes: replace as set ; tension per manual
    • Use: power transmission from motor to rotor
    • Application: hydraulic attachment component
    Regular price £31.26
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    • Order by 3pm for Next Day Delivery
  • Taper roller bearing (For cone splitter housing)
    Regular price £84.00
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    Taper roller bearing (For cone splitter housing)

    Key Features

    • Type: tapered roller bearing (33116)
    • Support: radial and axial load support for cone splitter spindle
    • Role: stabilises cone splitter housing under high load
    • Design: tapered rollers for efficient load distribution
    • Use: replacement bearing in cone splitter housing assembly
    Regular price £84.00
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    • Order by 3pm for Next Day Delivery
  • CETOP 5 Coil  - 12VDC, (31mm Bore x 75mm long) - Approved Hydraulics Limited
    Regular price £27.13
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    CETOP 5 Coil - 12VDC, (31mm Bore x 75mm long)

    Key Features

    • Part number: HP-31-75-COIL-12VDC
    • Valve standard: CETOP 5 / NG10 solenoid coil for directional control valves
    • Supply voltage: 12 VDC
    • Coil bore: 31 mm armature tube bore
    • Coil length: 75 mm overall length
    • Electrical connection: Typically via DIN 43650 / EN 175301-803 plug
    • Function: Energises solenoid valve to shift spool for flow direction control
    • Typical use: Mobile hydraulics; manifolds; power packs
    Regular price £27.13
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    • Order by 3pm for Next Day Delivery
  • PTO ZF 6S-300 MECHANIC CONTROL
    Regular price £481.36
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    PTO ZF 6S-300 MECHANIC CONTROL

    Key Features

    • Gearbox compatibility: ZF 6S‑300
    • Control: mechanical (lever/cable)
    • Mounting: side‑mount (6‑bolt aperture)
    • Pump interface: ISO 4‑bolt / UNI 3‑bolt (per variant)
    • Applications: tippers, recovery beds, small cranes
    Regular price £481.36
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • PTO ZF 6S-380 MECHANIC CONTROL
    Regular price £474.28
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    PTO ZF 6S-380 MECHANIC CONTROL

    Key Features

    • Gearbox compatibility: ZF 6S‑380 / 6S‑400 family
    • Control: mechanical (lever/cable)
    • Mounting: side‑mount (6‑bolt aperture)
    • Pump interface: ISO 4‑bolt direct‑mount
    • Approx weight: ~8 kg (aluminium housing)
    • Use: direct drive of hydraulic pumps on light/medium trucks
    Regular price £474.28
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • PTO ZF TWIN OUTPUT; S5/S6/6S; NO SENSOR
    Regular price £1,181.59
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    PTO ZF TWIN OUTPUT; S5/S6/6S; NO SENSOR

    Key Features

    • Gearbox compatibility: ZF S5 / S6 / 6S families
    • Outputs: twin pump outputs (two mounting flanges)
    • Control: pneumatic actuation
    • Sensor: not supplied (no sensor)
    • ABER reference: TF4201AMP
    • Benefits: drive two pumps or pump + accessory simultaneously
    • Mounting: PTO aperture on ZF manual transmissions
    Regular price £1,181.59
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Blade flail for TE80 and 100 LT - Approved Hydraulics Limited
    Regular price £7.20
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    Blade flail for TE80 and 100 LT

    Key Features

    • Compatibility: te80 ; te100 lt heads
    • Type: replacement knife blade
    • Material: hardened steel
    • Use: grass ; hedge trimming
    • Application: hydraulic attachment component
    Regular price £7.20
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Femac T9 FS Hammer Pin - Approved Hydraulics Limited
    Regular price £43.26
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    • Delivery to UK & Ireland

    Femac T9 FS Hammer Pin

    Key Features

    • Use: hammer pin for fs rotor
    • Compatibility: t9 fs rotor hammers
    • Construction: hardened steel
    • Note: replace with matching bushes
    • Application: hydraulic attachment component
    Regular price £43.26
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Femac T11&T13 FS Securing pin Nut To Suit HF19 Kit - Approved Hydraulics Limited
    Regular price £18.22
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    Femac T11&T13 FS Securing pin Nut To Suit HF19 Kit

    Key Features

    • Use: nut for hf19 securing pin
    • Compatibility: t11 fs ; t13 fs rotors
    • Type: self locking ; high tensile
    • Note: pair with hf19 pin as kit
    • Application: hydraulic attachment component
    Regular price £18.22
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1200mm Rotor Bar for T13 FR130 - Approved Hydraulics Limited
    Regular price £82.08
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    1200mm Rotor Bar for T13 FR130

    Key Features

    • Length: 1200 mm
    • Compatibility: t13 fr130 rotor
    • Role: hammer carrier bar
    • Material: high strength steel
    • Balance: install in matched pairs
    Regular price £82.08
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • T1 hammer bracket (Pair)
    Regular price £28.86
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    T1 hammer bracket (Pair)

    Key Features

    • Compatibility: t1 flail head
    • Kit: pair
    • Function: retains hammer to rotor lug
    • Material: steel ; heat treated
    • Use: grass ; light scrub applications
    Regular price £28.86
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Femac T11 FS & T13FS HF19 Pin
    Regular price £52.86
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    • Delivery to UK & Ireland

    Femac T11 FS & T13FS HF19 Pin

    Key Features

    • Use: securing pin for hf19 hammer
    • Compatibility: t11 fs ; t13 fs rotors
    • Construction: hardened steel
    • Notes: pair with matching nut ; bush
    • Application: hydraulic attachment component
    Regular price £52.86
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Flail motor 34cc - Approved Hydraulics Limited
    Regular price £840.06
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    Flail motor 34cc

    Key Features

    • Displacement: 34 cc/rev
    • Type: external gear motor
    • Group: group 2 mounting
    • Ports: bsp threads
    • Use: femac flail heads drive
    Regular price £840.06
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Flow control cartridge
    Regular price £341.60
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    Flow control cartridge

    Key Features

    • Type: adjustable needle flow control
    • Cavity: sae 08 ; 3/4-16 unf
    • Function: meter in ; meter out flow tuning
    • Pressure rating: up to 315 ; 350 bar class
    • Use: mini power pack manifolds ; mobile equipment
    Regular price £341.60
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    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

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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.