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FAQs

ISO VG 46 is the default for the majority of UK plant, agricultural, and industrial hydraulic systems operating at moderate temperatures — that's what your equipment handbook will specify in most cases. ISO VG 32 is used in cold-climate operations or for systems running at lower temperatures. ISO VG 68 is used in high-temperature continuous-duty applications, often in summer-only or hot-environment use. Always default to the equipment handbook's recommendation rather than substituting a different grade.

HM (or HLP) is the standard anti-wear hydraulic oil specification — suitable for most plant and agricultural hydraulics. HV adds high-viscosity-index improvers, giving better cold-start performance and a wider operating temperature range. HEES (sometimes called HEES-S) is a zinc-free, biodegradable fluid used where environmental contamination is a concern — forestry, marine, and watercourse-adjacent applications. Castrol Hyspin AWS, Shell Tellus S2, and Q8 Holbein are HM/HLP-grade. Specialist HV and HEES grades are supplied on request — contact the team for availability.

Yes, in most cases — as long as both fluids meet the same specification (e.g. both are ISO VG 46, anti-wear HM grade, with compatible additive chemistry). Mixing brands within the same specification category will not damage the system. Avoid mixing across specification categories — for example, topping up a zinc-free HEES system with a standard zinc-additive HM oil will compromise the biodegradable properties. For full system flushes, complete a drain and refill rather than mixing.

Castrol Hyspin AWS, Shell Tellus S2 / S3, and Q8 Holbein and Heller hold approvals from the major plant OEMs including JCB, Volvo CE, John Deere, and Komatsu, as well as the German hydraulic specifications (DIN 51524-2 HLP, DIN 51524-3 HVLP). Check the specific OEM approval list on each product page against your equipment manufacturer's recommended fluids list. WhatsApp 07754288583 with the machine make and model if you need confirmation.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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Hydraulic Oil

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Hydraulic Oil is the working fluid in any hydraulic system — telehandler booms, excavator arms, tractor hydraulics, log splitters, hydraulic presses, and the closed-circuit hydraulics on plant and agricultural machinery. Within Oil, this is the second-highest-demand sub-category, supporting fleet maintenance and major hydraulic-system rebuilds across the UK plant and agricultural sector. Parts For Machines supplies hydraulic oils across the standard ISO viscosity grades — ISO VG 32, 46, and 68 are the workhorse grades for the majority of UK hydraulic applications.

ISO VG 22 and 100 are also carried for cold-weather and high-temperature use cases respectively. Hydraulic oils are formulated as either anti-wear (HM/HV grade) or zinc-free (HEES, biodegradable) variants depending on the application. Parts For Machines is an Authorised Distributor and Seller of Shell, Castrol, and Q8 across hydraulic fluids.

Castrol Hyspin AWS is the most-carried hydraulic oil range — anti-wear, with grades AWS 32, AWS 46, and AWS 68 covering the majority of plant and agricultural hydraulics. Shell Tellus S2 and S3 cover the corresponding range with Shell's anti-wear formulation. Q8 Holbein and Heller cover heavy-duty hydraulic applications across the same viscosity bands. The right grade depends on three things: the manufacturer specification (Castrol AWS 46, for example, meets DIN 51524-2 HLP plus ISO 11158 HM, plus most plant-OEM approvals); the operating temperature range; and the system pressure.

For most agricultural and plant applications running at moderate temperatures, ISO VG 46 is the default — switch to VG 32 for cold-start applications or VG 68 for high-temperature continuous-duty. Bulk pricing applies on multi-drum and pallet orders. 20-litre drums and 208-litre barrels are the typical service-pack sizes — contact the team via WhatsApp 07754288583 for pallet quantity quotes.

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FAQs

ISO VG 46 is the default for the majority of UK plant, agricultural, and industrial hydraulic systems operating at moderate temperatures — that's what your equipment handbook will specify in most cases. ISO VG 32 is used in cold-climate operations or for systems running at lower temperatures. ISO VG 68 is used in high-temperature continuous-duty applications, often in summer-only or hot-environment use. Always default to the equipment handbook's recommendation rather than substituting a different grade.

HM (or HLP) is the standard anti-wear hydraulic oil specification — suitable for most plant and agricultural hydraulics. HV adds high-viscosity-index improvers, giving better cold-start performance and a wider operating temperature range. HEES (sometimes called HEES-S) is a zinc-free, biodegradable fluid used where environmental contamination is a concern — forestry, marine, and watercourse-adjacent applications. Castrol Hyspin AWS, Shell Tellus S2, and Q8 Holbein are HM/HLP-grade. Specialist HV and HEES grades are supplied on request — contact the team for availability.

Yes, in most cases — as long as both fluids meet the same specification (e.g. both are ISO VG 46, anti-wear HM grade, with compatible additive chemistry). Mixing brands within the same specification category will not damage the system. Avoid mixing across specification categories — for example, topping up a zinc-free HEES system with a standard zinc-additive HM oil will compromise the biodegradable properties. For full system flushes, complete a drain and refill rather than mixing.

Castrol Hyspin AWS, Shell Tellus S2 / S3, and Q8 Holbein and Heller hold approvals from the major plant OEMs including JCB, Volvo CE, John Deere, and Komatsu, as well as the German hydraulic specifications (DIN 51524-2 HLP, DIN 51524-3 HVLP). Check the specific OEM approval list on each product page against your equipment manufacturer's recommended fluids list. WhatsApp 07754288583 with the machine make and model if you need confirmation.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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