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Shipping hydraulic parts: avoid leaks and refusal by couriers

Garages and offshore companies ship them every day: heavy hydraulic parts, pumps and cylinders to international destinations. But the logistics of these B2B shipments call for precision. Courier services apply strict safety rules, especially for industrial components. In this article you'll read exactly how to avoid refusal and get your shipment safely to its destination.
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Last updated 26 October 2026

How do I ship a hydraulic pump without DHL refusing it? 

To ship a hydraulic pump without DHL or another courier refusing it, the part has to be completely dry. That means: drain the oil, degrease the part industrially, cap all inlets and outlets firmly, and seal it in liquid-tight plastic bags. Use plenty of absorbent material in a double-walled box or wooden crate.

Draining the oil for transport: the absolute basics 

When you start shipping pumps, draining the oil for transport is the most critical step. Hydraulic oil left inside will leak during air freight because of the pressure differences in the aircraft. Leaks lead straight to your shipment being destroyed or refused, and even small residues quickly fall under strict dangerous goods rules. So always check the official IATA Dangerous Goods Regulations (DGR) to make sure your parcel is allowed to fly.

Shipping dirty parts and pumps 

Parcel services don't accept shipments that could soil conveyor belts or other parcels. Dirty parts must be 100% grease-free on the outside. Then pack the cleaned components in special oil pads. Got dry, clean engine or machine components ready to go? Then you can easily and affordably ship machine parts through ParcelParcel to more than 220 countries worldwide.

Shipping overhauled parts and a heavy cylinder 

Overhauled parts are high in value and need sturdy protection. Shipping a hydraulic cylinder often brings extra challenges because of its heavy weight and unusual length. To prevent leaks, use steel screw plugs instead of tape.

If the cylinder or pump is too heavy for regular parcel post, we recommend freight transport. You can send heavy industrial objects very safely as a pallet shipment. Make sure the part is firmly secured to the pallet with steel straps. For general B2B shipments or smaller shipments, you can of course always send your international parcel straight away through our platform, and we'll guide you through the right customs paperwork.

Frequently asked questions

How do I ship a hydraulic pump without DHL refusing it?+

To avoid refusal, drain the pump completely, degrease it, cap all ports with plugs (not tape) and pack it in at least two liquid-tight seal bags with absorbent material.

Why is draining the oil for transport so important?+

Leftover hydraulic oil can leak because of air pressure differences during air freight. Leaks damage other parcels, lead to your shipment being refused immediately and can result in heavy fines, because liquids are often treated as Dangerous Goods.

Can I ship dirty parts and pumps?+

No, couriers don't accept dirty parts. If a parcel smells of oil, has damp patches or leaves dirt behind, it's stopped at the sorting centre straight away. Clean the outside of every part thoroughly and make it grease-free.

How can I prevent leaks when shipping a cylinder?+

You can prevent leaks by pumping the cylinder as empty as possible. Then close off all line connections with high-quality steel or plastic screw plugs. Finally, wrap the whole thing in oil-absorbing cloths and double plastic bags.

What's the best way to ship heavy overhauled parts?+

For heavy hydraulic pumps or long cylinders that are too heavy for the regular parcel network, pallet transport is the safest option. It prevents lifting damage and makes sure the parts travel stably and safely through the freight network.

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