Swing Arm Cylinder

What this model is — and what it is not

A long-stroke, large-bore cylinder documented as a swing arm cylinder. It should be matched only after the machine geometry, pivot loads, mounting pins, port arrangement, and duty cycle are verified.

The practical use case is swinging arms, lifting linkages, waste-handling or other mobile mechanisms with a large angular envelope. That sentence is an engineering description of the duty suggested by the catalogue title and visible geometry; it is not a claim of compatibility with a particular John Deere, Case IH, New Holland, AGCO, Valtra, Jacto, Stara, or other machine. The supplied catalogue does not list OEM part numbers, machine years, port threads, seal compounds, coating systems, integrated valves, cycle life, temperature limits, or interchange approvals. Those facts remain unknown until a controlled drawing package is reviewed.

How to read the catalogue code and dimensions

The catalogue prints the specification as Φ160×Φ80×1925. The last number matches the “Trip” value of 1925 mm, so this site records an engineering interpretation of bore 160 mm, rod 80 mm, and nominal stroke 1925 mm. The interpretation is useful for preliminary force and packaging calculations, but the approved order drawing must define whether installation distance is pin-centre to pin-centre, face-to-face, or another reference and must state tolerances, port orientation, pin diameters, and closed/extended dimensions.

Model code HCYY11112014 should remain unchanged in RFQs, file names, inspection reports, and drawing revisions. A buyer should not shorten the code to “2014 cylinder” because similar-looking products can differ in mount geometry, internal stop design, gland retention, cushioning, and pressure containment. Photographs are useful for recognition but are not dimensional evidence.

Derived force envelope for early screening

Using the catalogue working pressure of 30 MPa and the interpreted bore and rod diameters, the ideal hydraulic force is approximately 603.2 kN on extension and 452.4 kN on retraction. These values are derived from pressure multiplied by piston area at 100% hydraulic efficiency. They exclude seal friction, back pressure, pressure loss, load angle, acceleration, shock, structural deflection, pin friction, mechanical advantage, and safety factors. They are therefore not rated machine capacities.

Application duty and failure risks

• Long stroke and large bore make rod stability, side-load control, pin alignment, and structure stiffness central selection questions.
• The 30 MPa working-pressure entry is a catalogue fact; it is not an instruction to run every system at that pressure.
• Because the source does not identify an agricultural machine, this model is not presented as a direct soybean, sugarcane, coffee, or livestock-equipment replacement.

A cylinder rarely sees pure axial force throughout a real machine cycle. Pin clearance, bent brackets, unequal supports, hose restraint, weld distortion, or a pivot that is not coaxial can introduce side load. Side load accelerates wear at the rod bearing and seals, scores the rod or tube, raises friction, and may distort the gland. The larger and longer the cylinder, the more important it is to model the mechanism through the complete stroke rather than checking only the parked position.

Compression loading also creates a rod-buckling question. The effective buckling length depends on the mounting condition and how the machine guides the load. Bosch Rexroth’s current cylinder configurator, for example, treats installation position and buckling length as explicit configuration inputs. That methodology supports the RFQ approach used here: rod diameter alone is not enough; mounting restraint and load direction must be known.

Mounting, pins, and structure

Confirm the mounting style at both ends, pin diameters, usable pin length, bushing material, lubrication method, bracket thickness, misalignment allowance, and whether spherical bearings are required. The structure around the cylinder must remain stiff enough to keep the mounts parallel under peak load. A visually correct pin centre can still bind if the bracket faces are not aligned or if the machine frame twists during operation.

The catalogue drawing should be used as a source image, but production must follow a controlled drawing with revision, tolerances, weld symbols, material callouts, surface finish, test requirements, and acceptance criteria. For replacement projects, record the old cylinder’s fully closed pin-centre, fully extended pin-centre, stroke, barrel outside diameter, rod diameter, pin dimensions, port threads, port angle, hose clearance, and any valve block or sensor.

Ports, valves, speed, and heat

The catalogue pages do not state port thread or port size. Do not select SAE, BSPP, BSPT, metric, NPT, or flange connections by country stereotype. Photograph the existing port next to a thread gauge, record the measured major diameter and pitch, and confirm the sealing method. A thread that appears to fit can leak or damage the port if the seat and sealing principle differ.

Cylinder speed depends on effective area and actual flow at the actuator. High speed raises pressure drop, end-of-stroke energy, heat generation, and the risk of cavitation on the return side. A large bore may require more flow than the machine valve can supply; a small annulus area may create high retraction speed. Confirm target cycle time, pump flow, valve metering, hose size, and permissible back pressure before finalizing ports or cushions.

Load holding is a system function. Depending on the hazard analysis and machine geometry, the circuit may need a counterbalance valve, pilot-operated check valve, hose-burst protection, mechanical lock, transport pin, or another safeguard. The supplied catalogue does not state that any of these devices are built into model HCYY11112014. A valve shown on an existing machine should be identified by its markings and hydraulic schematic rather than copied by appearance.

Brazilian field conditions

Brazilian agriculture spans humid tropical zones, hot dry harvest periods, abrasive dust, crop residue, fertilizer exposure, high-pressure washing, and long transport distances. These are market-context inputs, not catalogue specifications. An RFQ should define minimum and maximum ambient temperature, fluid type and cleanliness target, wash chemicals, expected outdoor storage, corrosion exposure, rod damage risk, and service access. For machines operating far from workshops, the design review should also consider standard seal availability, field-removable pins, protected ports, and a practical inspection routine.

Rod corrosion and contamination are common reliability drivers during seasonal idle periods. Options can include suitable rod coating, wiper geometry, protective bellows or guards, paint/coating specification, capped ports during transport, and storage with the rod retracted where the machine design allows. No coating or seal material is claimed for this catalogue model because the source does not state one.

Installation and commissioning workflow

1. Compare the approved cylinder drawing with the machine drawing and physically measure the pin centres, pin diameters, bracket spacing, and port clearance.
2. Flush or clean the connected circuit to the machine manufacturer’s procedure; prevent uncapped hoses and ports from collecting dust.
3. Install the cylinder without forcing the mounts into alignment. Pins should enter without using hydraulic pressure to pull distorted brackets together.
4. Connect hoses with the correct thread, seal, torque, bend radius, abrasion protection, and movement allowance.
5. Bleed and cycle at low pressure and low speed while checking interference, hose sweep, unusual noise, binding, and leakage.
6. Increase load in controlled steps, verify system pressure and temperature, and inspect the mount structure before full production duty.
7. Record the final drawing revision, hose identification, valve settings, commissioning readings, and inspection interval.

Maintenance and troubleshooting

Routine checks should look for oil film or active leakage at the rod and ports, rod scoring or rust, loose pins, worn bushings, cracked welds, paint damage, bent guards, hose abrasion, unusual drift, slow movement, and heat. A leaking rod seal may be a symptom of contamination, rod damage, side load, or bearing wear rather than an isolated seal problem. Replacing seals without correcting alignment can lead to rapid recurrence.

Unexpected drift requires a structured test. Isolate whether leakage is across the piston, through a valve, through a load-control device, or external. Do not use a person or unsupported load as a test weight. Sudden movement, hose failure, or a released trapped pressure can cause serious injury. Maintenance procedures must follow the machine manufacturer’s lockout, blocking, depressurization, and stored-energy controls.

RFQ and drawing-approval checklist

• Model reference: HCYY11112014, catalogue page 23, and the catalogue specification Φ160×Φ80×1925.
• Machine manufacturer, machine model, serial number, year, and cylinder function.
• Quantity, annual demand, prototype quantity, and whether the request is new design or replacement.
• Closed and extended pin-centre dimensions, stroke, pin diameters, bracket widths, and mounting orientation.
• Port thread, port position, hose routing, valve block, sensor, and load-holding requirements.
• Normal pressure, relief pressure, flow, cycle time, cycles per day, load direction, shock, and side-load conditions.
• Hydraulic fluid, operating temperature, contamination target, washdown, dust, chemicals, and corrosion exposure.
• Required materials, rod coating, paint system, test protocol, documentation, marking, and packaging.
• 2D drawing, 3D model, photos, old cylinder nameplate, and any failed-part analysis.

Standards and selection context

ISO 6020-2:2015 remains a published standard for metric mounting dimensions of 16 MPa compact-series single-rod cylinders and was confirmed in 2026. ISO 6022:2006 remains published for 25 MPa mounting dimensions while a revised edition is under development. Those standards are selection context only. The supplied models are custom mobile cylinders, and this site does not claim that their mounts conform to either standard. Parker’s current specification guide likewise treats capacity, stroke, speed, temperature, mounting, bore, rod, seals, and custom requirements as interacting decisions.

The correct conclusion is not “choose the closest standard.” It is “control the application inputs, compare them with the source drawing, and approve the final design.” That is especially important for a model with catalogue working pressure of 30 MPa and a custom visible mount arrangement.

Evidence boundary

Catalogue exact: model code, printed specification, working pressure, maximum withstand pressure, trip, installation distance, weight, product title, product image, and dimension drawing. Derived: ideal extension and retraction force calculations. Engineering inference: application risks, mounting checks, valve questions, environmental inputs, installation workflow, and maintenance guidance. Web context: Brazil crop and credit data plus current standards and manufacturer selection methodology. The approved order drawing and contract control production.