2CX, 3CX, 4CX, MIDI CX
Telescopic Handlers, Wheeled Loaders, FASTRAC, Mini Excavators
The oil level sight glass is a key inspection component of the hydraulic tank. It allows for a quick and easy visual check of the oil level, which is essential for the proper operation of the machine. If your sight glass is cracked, cloudy, or so yellowed that the oil level is not visible, or if oil is leaking from it, these are classic signs of wear. A faulty sight glass makes it impossible to check the oil level, creating a huge risk of running with a low level and seizing the hydraulic pump – one of the most expensive failures.
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Excellent Clarity
Easy and reliable oil level reading
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Perfect Seal
Protection against oil loss
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High Durability
Long life in harsh conditions
The accuracy and quality of materials guarantee long and trouble-free use without the need for frequent replacement.
The sight glass is fully adapted to work with original JCB hydraulic tanks, ensuring a consistent and leak-proof fit.
The GX-AFTER brand is a proven and safe alternative that offers quality comparable to original parts at a much better price.
Before replacement, ensure the machine has been turned off for a while and the oil in the system is cold to avoid burns.
To avoid spillage, drain the oil from the tank to a level below the sight glass mounting hole.
Always install the sight glass with a new sealing O-ring. Reusing an old, deformed seal is a guarantee of a leak.
Tighten the sight glass gently, until a seal is achieved. Overtightening can damage the thread in the tank or the indicator itself.
Answer: Unfortunately, no. The cloudiness or yellowing is the result of polymer degradation from heat and UV exposure. The only solution is to replace it.
Question: I have a leak from under the sight glass. Do I need to replace the whole thing?Answer: First, you should replace the sealing O-ring. However, if the body of the sight glass itself is cracked or damaged, the entire unit must be replaced.
Question: Why is the correct hydraulic oil level so important?Answer: Operating with a low oil level leads to the hydraulic pump sucking in air (cavitation), which in a very short time leads to its seizure and an extremely expensive failure.
If you are unsure whether the selected product is suitable for your machine, contact us and we will help you choose the right part and provide practical advice in minutes.
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