1. Put off the original hydraulic oil before changing, check the oil return filter, oil absorption filter, pilot filter to see if there are iron filings or other impurities, if there are hydraulic components failure, after cleaning, cleaning system .
2. When changing hydraulic oil, all hydraulic oil filter elements (return oil filter, oil suction filter, pilot filter) must be replaced at the same time, otherwise it is equivalent to no change.
3. Identify the hydraulic oil label. Different grades and different brands of hydraulic oil are not mixed, and may react to deteriorate and produce floc. It is recommended to use the excavator to specify oil.
4. Before the refueling, the oil-absorbing filter element must be installed first. The nozzle that is covered by the oil-absorbing filter element leads directly to the main pump. When the impurity is light, the main pump wears up, and the pump is pumped.
5. Refueling to the standard position, the oil tank generally has an oil level gauge to see the liquid level gauge. Pay attention to the parking mode. Generally, all the cylinders are fully retracted, that is, the arm and bucket are fully extended and landed.
6. After adding the oil, pay attention to the main pump to discharge air, otherwise the light will temporarily stop the whole car, the main pump will be abnormal (air blast), and the air hole will damage the main pump. The air exhaust method is to loosen the pipe joint directly on the top of the main pump and directly fill it up.

Xinxiang City Huahang Filter Co., Ltd. is a professional industrial filter manufacturer integrating design, production and marketing. With strong technical force, perfect testing means, and excellent after-sales service, we provide users with a variety of high-quality products.

Our main products include hydraulic filters, air filters and pipe filters. Products are widely used in petroleum, chemical and metallurgical machinery, textile, pharmaceutical, automobile, chemical fiber, and air-conditioning.

"Quality first, customer first" is our business objective. We will, as always, offer new and old customers with the best quality service.

Q1 How can we get the quotation of flter cartridges
A: Kindly please let us know the specifications,such as the material,length,micron,adapter,apply in which industry.....
Q2. How about your delivery time?
A: Generally, it will take 25 to 35 days after receiving your advance payment. The specific delivery time depends
on the items and the quantity of your order. and if the item was non standard, we have to consider extra 10-15days for tooling/mould made.
Q3. Can you produce according to the samples or drawings?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q4. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.