Oem 2025 New Hydraulic Cylinders for Walking Machinery Used in Small Excavators Nested Sleeve Type Good Hydraulic Cylinders – We Make Sure Inside Parts
The tube follows GUOYUE CD250 style.
Tube steel can be 45#, 42CrMo, or 27SiMn.
Hole is ground to H8 and feels smooth, Ra under 0.4 μm.
Head, base, ears, and piston are only 45# steel.
We do not use cast iron or cast steel. Slow-Down Parts
You can pick fixed bumpers or floating bumpers so the rod slows down safe at any speed or load. Welds
We hit every heavy-load weld with ultrasound.
This takes away most of the stress and makes the weld last longer. Seals
We only use top seals from NOK (Japan), Trelleborg (Sweden), Merkel and GP (Germany).
We do not use local seals. Checks
Each cylinder is tested to GB/T15622-2005 and our own Q/GAKY014-2023.
You get a test sheet and a pass paper. Promise
We give one year cover from ship date.
If it breaks because of how we made it, we fix or swap it for free.
This cylinder is strong. It uses thick steel and hard rod. It does not bend. The seal keeps oil in, no leak. It has many tubes that slide out one by one. It lifts high but stays short Advantages:
She’s the gentle giant who fits into tight spaces. Nested sleeves glide out like a magician’s wand, giving small excavators the reach of a giraffe while folding back into a lunchbox. Custom-built for walking machinery, she slides into the rig like a missing puzzle piece—no shims, no swearing. Chrome skin laughs at mud and dust, while balanced oil paths keep every step smooth and quiet. Day after muddy day she murmurs, “Step easy, I’ve got your load,” and the operator feels the ground without the worry. Application scenes:
Picture a narrow city alley at sunrise: a mini excavator steps over parked cars, guided by her gentle push. Or a backyard dig where she helps the machine walk over flower beds without a single crunch. From urban construction to landscaping, she’s the quiet heartbeat that keeps small excavators moving gracefully, turning tight spaces into wide-open possibilities.

Application	Engineering machinery, mine, shipping, metallurgy, water conservancy, offshore, agriculture, etc.
Seal	Parker, Merkel, NOK, Hallite,etc.
Paint	Red, Grey, Yellow, Black, etc.
Material	St52, CK45, 4140, Duplex2205, Stainless Steel 304/316, etc.
Certificate	ABS, Lloyds, SGS, etc.
Package	Bubble-wrap packing, then in wooden case.
Color	choose the color according to customer requirement
Core components	Bearing,Pressure vessel,Pump
Is it a standard part?	Nonstandard
Structure	Piston Type, Plunger Type, Telescopic Type,
Power	Hydraulic & Pneumatic
Brand	Guoyue
Sample	Available