22-5142046 Hydraulic Power Steering Cylinder | 50mm Bore 199mm

22-5142046 Hydraulic Power Steering Cylinder for Tractor — 50 mm Bore × 199 mm Stroke Compact-Rod OEM Steering Ram

Engineering Overview: 22-5142046 Short-Bracket 358 mm C-C Hydraulic Steering Cylinder for Compact Front Axle Geometry

The 22-5142046 Hydraulic Power Steering Cylinder for Tractor occupies an unusual dimensional position in the 50 mm bore class: it pairs a relatively large 50 mm bore with a short 22 mm rod and a compact 358 mm C-C mounting distance. This combination targets compact-to-mid tractors whose front axle bracket positions are set close together—typically narrow-track machines or those with a short wheelbase front axle configuration—while still requiring the 50 mm bore’s force output to manage the heavier steering resistance produced by wider front tyres or loaded front axle conditions. The 199 mm stroke delivers adequate wheel arc travel within the short bracket span, achieved through a high stroke-to-C-C ratio of 0.56, which is atypically high and indicates that the cylinder operates close to its full travel range on every lock-to-lock manoeuvre.

The part number prefix “22-5142046” follows a numeric coding convention used by several Chinese compact tractor brands; the “22” prefix may reference a chassis series identifier, and “5142046” is the component drawing number. Fleet procurement managers should confirm the 358 mm C-C and 22 mm rod diameter explicitly when cross-referencing this part, as the 22 mm rod is the smallest used in any 50 mm bore steering cylinder in this product range—any supplier offering a 25 mm rod unit as a substitute is providing a dimensionally non-interchangeable component that will not fit the original rod-end clevis bore.

Structural Specifications: High Bore-to-Rod Ratio, Buckling Risk Threshold, and Seal Configuration for the 50 mm × 22 mm Tractor Power Steering Cylinder Replacement

With a bore area of 1,963 mm² and a rod area of 380 mm², the bore-to-rod area ratio is 5.16:1—the highest in this product series. This large differential means that at 12 MPa operating pressure, the extension force reaches 23.6 kN while the retract force is only 19.1 kN. The 22 mm rod is the primary structural concern at 199 mm stroke: its Euler buckling load under fixed-pinned conditions is approximately 48 kN, giving a buckling safety factor of approximately 2.0 at rated pressure—adequate for normal steering loads but leaving limited reserve against dynamic lateral impact loads on rough terrain. The design compensates through the short 358 mm C-C bracket span, which limits the maximum lateral deflection the rod can sustain under combined axial-plus-lateral loading. Operators should avoid high-speed sharp steering manoeuvres on heavily corrugated ground surfaces, as these generate transient lateral cylinder loads that approach the rod’s buckling limit more closely than normal field steering does.

Barrel tube is 20# seamless precision steel, honed to Ra ≤ 0.4 µm. The 22 mm rod is 45# carbon steel, induction hardened to 55–60 HRC, chrome plated to 20–25 µm and ground to h6 tolerance. Seal kit: PU piston U-ring, NBR O-ring backup, PU rod U-seal, and PU wiper seal. Given the high bore-to-rod area ratio, the piston seal carries a higher pressure differential per unit seal area than in lower-ratio designs; the PU compound specified (rated to 20 MPa dynamic) provides adequate safety margin at the 14 MPa design working pressure.

Fitment Guide: 358 mm Short-Bracket Mounting Verification and Clevis Pin Tolerance for the 22-5142046 Compact Tractor Steering Cylinder

The 358 mm C-C is among the shortest mounting distances in the 50 mm bore class and must be measured carefully on the target machine before ordering. Clevis pin bores are 20 mm H7 at both ends, matching the 20f7 pin standard on compact Ningbo and YTO-derivative front axle designs. Verify that the axle bracket pin bores are 20 mm—not 22 mm—as the 2 mm difference is sufficient to prevent safe pin engagement. For OEM cross-referencing, confirm all four parameters: 50 mm bore, 22 mm rod, 199 mm stroke, 358 mm C-C. Substituting a cylinder with a 25 mm rod risks a rod-end clevis interference fit; substituting a cylinder with a different stroke will alter the wheel lock angle and may produce steering arm contact with the axle beam at full lock.

Installation and Seal Maintenance: Bleeding Protocol and Wear Inspection Schedule for the 50 mm Short-C-C Hydraulic Power Steering Ram

Torque clevis pin retention fasteners to 30–35 N·m at both ends. Use M14×1.5 port fittings with new copper washers; torque to 30–35 N·m. Bleed the circuit with five full lock-to-lock cycles at low idle. Due to the high stroke-to-C-C ratio, the cylinder operates near its full travel extent on each lock manoeuvre—inspect the rod end clevis for contact with any adjacent axle components at full lock before finalising the installation. Inspect rod wiper seals at every 500-hour service interval. Seal kit replacement interval: 2,000 hours in clean conditions, 1,200 hours in abrasive field environments.

Quality Testing and B2B Procurement Terms for the 22-5142046 Tractor Hydraulic Steering Cylinder

Each unit is proof-tested at 21 MPa static for 5 minutes per stroke direction, followed by 10 dynamic cycles at rated pressure. Internal leakage acceptance criterion: ≤2 mL/min across the piston seal. Chrome rod samples undergo 240-hour ASTM B117 salt spray testing per production batch. MOQ is 10 units; standard pallet quantity is 50 units. Lead time: 7–12 working days FOB Ningbo. Custom options include alternative port thread standards (BSP, NPT) and FKM seal upgrades for high-temperature applications. OEM white-label documentation available in English, Spanish, and Portuguese.