Truck Crane Counterweight Cylinder | EP-HCYY11112017 Model
Truck Crane Counterweight Cylinder
EP-HCYY11112017 · Φ200mm · Stroke 180mm · 21 MPa · 55 kg · L/R Paired
The cylinder that positions the counterweight for crane stability. Mounted in left/right pairs, counterweight cylinders extend or retract the counterweight assembly — adjusting its radial distance from the crane's centre of rotation to balance the moment created by the boom and suspended load. Correct counterweight positioning is essential for crane stability at every boom angle and load combination.
Technical Specifications
▲ Dimension Drawing
| Parameter | Specification |
|---|---|
| Product Name | Truck Crane Counterweight Cylinder |
| Cylinder Model | EP-HCYY11112017 |
| Bore Diameter (D) | Φ200 mm |
| Rod Diameter (d) | Φ100 mm |
| Stroke (S) | 180 mm |
| Installation Distance (L) | 530 mm |
| Working Pressure | 21 MPa |
| Maximum Withstand Pressure | 32 MPa |
| Weight | 55 kg |
| Application | Truck-Mounted Crane |
▲ Truck Crane Counterweight Cylinder | EP-HCYY11112017 ModelHow Counterweight Positioning Ensures Crane Stability
A truck crane's stability depends on the balance between the load moment (boom length × load weight) and the counterweight moment (counterweight distance × counterweight mass). As the boom extends or the load increases, the counterweight must move outward to maintain balance. The counterweight cylinder provides this adjustment.
The 180 mm stroke provides the range of counterweight positions needed — from fully retracted (for transport, keeping the crane compact) to fully extended (for maximum lifting capacity at long boom radius). The Φ200 bore at 21 MPa produces approximately 660 kN — enough to push the multi-tonne counterweight assembly along its rails against friction and gravity.
Left and right counterweight cylinders must extend equally — any asymmetry shifts the counterweight off-centre, creating a side-loading condition that reduces crane stability. Korea Ever-Power supplies counterweight cylinders in matched pairs from the same production batch. Browse the full mobile machinery hydraulic cylinder range.
Counterweight Positioning: The Stability Equation
If the load moment exceeds the counterweight moment, the crane tips. The counterweight cylinder positions the counterweight to maintain a safety margin at every boom angle and load combination — typically 15–25% margin per crane standards.
For road transport, the counterweight retracts (cylinder retracted) to keep the crane within road width limits. For lifting, the counterweight extends (cylinder extended) to maximise stability. The 180 mm stroke covers this range.
Unlike the anti-tilt and luffing cylinders (80%+ rod ratio), the counterweight cylinder has a 50% rod ratio — providing balanced push and pull force for moving the counterweight in both directions.
Key Advantages
- Φ200 bore for 660 kN positioning force — moves multi-tonne counterweight assemblies along their rails against friction and gravity.
- 21 MPa / 32 MPa rating — handles the dynamic loads of counterweight repositioning during crane setup and load changes.
- Left/right matched pairs — ensures symmetrical counterweight positioning for balanced crane stability.
- ⚡ 180 mm stroke — covers the full range from transport (retracted) to maximum lifting (extended) configuration.
- ️ 530 mm installation distance — compact design fits within the counterweight rail assembly space.
Truck Crane Cylinder Family
Spring Cyl. Φ63, 5kg
Anti-Tilt Cyl. Φ190, 590kg
Pin Cyl. Φ80, 18kg
Luffing Cyl. Φ320, 3500kg
Counterweight Cyl. Φ200, 55kg
Why Choose Korea Ever-Power
Korea Ever-Power is a professional hydraulic cylinder manufacturer and supplier, specialising in forklift hydraulic cylinders, aerial work vehicle cylinders, mobile machinery cylinders, offshore cylinders, and industrial engineering cylinders. Our production facilities are equipped with composite machining centres, multi-station welding robots, automated assembly lines, specialised cylinder testing machines, and a dedicated quality inspection area — ensuring every cylinder meets OEM-grade performance standards.
Korea Ever-Power forklift tilt cylinders are manufactured to the same specifications and quality standards as original equipment cylinders fitted to major forklift brands worldwide. Every cylinder is 100% hydrostatic pressure tested, dimensionally inspected, and shipped with a test certificate and seal kit. Contact the Korea Ever-Power team for pricing and lead time.
Frequently Asked Questions
What Our Customers Say
"We replaced both counterweight cylinders on our 220-tonne crane. The matched pair from Korea Ever-Power positions the counterweight evenly — no side-loading alarms since installation. The 55 kg weight per cylinder is manageable for a 2-person team."
P. Sørensen — Crane Service Manager, Denmark
"Good quality at approximately 35% below OEM price. The Φ200 bore provides smooth, powerful counterweight movement. Chrome finish on the Φ100 rod is clean and even."
R. Takahashi — Heavy Equipment Buyer, Japan
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Informação adicional
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