The most easily overlooked step after customers receive the bending machine: Adding hydraulic oil!

When we deliver a high-quality, well-debugged bending machine to a customer, everyone may think that everything is ready and can be used after plugging in.

But do you know? After the equipment is successfully delivered to the customer's site, there is an extremely critical but often overlooked action —— Adding hydraulic oil. If this step is forgotten, the equipment will alarm at best, or the hydraulic system will be directly damaged at worst.

Today we are going to talk about the most "pitfall" link in the delivery process of bending machine.

Why don’t you add hydraulic oil directly when leaving the factory?

Many customers will wonder: "Since hydraulic oil is so important, why don't manufacturers add it in advance?"

The reasons are as follows:

✅ 1. Transportation safety

Hydraulic oil may leak or seep due to vibration during transportation, contaminating the packaging and equipment.

✅ 2. Weight issue

Hydraulic oil usually weighs 80~150kg, which has a great impact on transportation costs, especially for export full container.

✅ 3. Customs clearance requirements

Some countries/regions have restrictions or require declarations for the entry of equipment containing liquids, so dry machine shipment are easier to clear.

Therefore, most manufacturers will adopt the "dry machine factory" method. Of course, we will clearly remind you in the operation video and user manual: Please fill the tank with No.46 anti-wear hydraulic oil before powering on for the first time.

Serious consequences of neglecting refueling

If the customer turns on the machine without refueling according to the process, a series of serious problems will occur:

✅ Special reminder: Dry-running problems in the hydraulic system are usually not covered by the warranty and are due to improper human operation.

Correct operation process: do this when adding oil for the first time

After receiving the bending machine, please strictly follow the steps below:

Step 1: Choose the right hydraulic oil

Recommended model: 46# or 68# anti-wear hydraulic oil (such as: Shell Tellus 46, Mobil DTE 25, etc.) In extremely cold areas, VG32 or low-temperature type can be used.

Step 2: Fill hydraulic oil

Open the oil filling port on the top of the oil tank and slowly fill it through the filter until it reaches the center line of the oil level window (usually visible on the side of the machine). The oil filling volume of the bending machine is generally 80~180L, depending on the tonnage and model.

Step 3: Exhaust treatment

Start the motor and oil pump and confirm whether the motor rotates in the direction indicated by the arrow, then let the machine slider press down and rise in a cycle for 3 to 5 minutes to complete the exhaust treatment.

Step 4: Check pressure and movement

After powering on, check whether the oil pump sound is normal, whether the oil pressure gauge is stable, and whether the slider moves smoothly.

Conclusion: A small action saves a machine

Although adding hydraulic oil is a simple step, it is one of the most critical steps before starting the equipment.

As a manufacturer or salesperson, we should remind customers repeatedly when delivering the machine; and as an end user, we must carefully follow the operating procedures.

This not only prolongs the service life of the equipment, but also is a basic guarantee for production efficiency, product quality and personnel safety.