Complete cylinder
Tube, rod, piston, gland, sealing interfaces and mounting components have separate condition and identity questions.
Component family profile
Hydraulic cylinders & seal kits
Identify the complete cylinder, its mounting and its sealing interfaces before selecting a kit or comparing a replacement assembly.
Identification methodInstalled fitment requires evidence
Research actions
At a glance
Identification essentials
Assembly identityMaker · number · revisionFamily-level identification methodWorking geometryBore · rod · strokeFamily-level identification methodInstallation interfacesMounts · pins · portsFamily-level identification method
Identification criteria describe what to establish. Documented examples below retain their own component and configuration scope.
Scoped reference evidence
Engineering specification reference
These independently bounded references do not define a universal family specification. Preserve the named component and operating conditions with each value.
Parker: European 2H catalogue HY07-1110/UK
| Parameter | Documented reference | Evidence |
|---|---|---|
| European2H headline working-pressure category | 210 barParker2H European industrial tie-rod family,HY07-1110/UK | Scope & sourceConditional family headline; mounting, rod and duty restrictions can impose lower limits. Not a circuit setting. Parker2H European industrial tie-rod family,HY07-1110/UK Printed pp.2 and32: mounting styles and pressure limitations; historic catalogue edition, current configuration unverified Manufacturer documentary reference; not a HeavyEQ machine measurement HY07-1110/UK; filename indicates2017, definitive current publication date not established No named machine application or serial fitment established Parker: European 2H catalogue HY07-1110/UK ↗ |
| Family dimensional-range lower bore | 38.1 mmParker2H European catalogue,printed p.2 | Scope & sourceCatalogue family dimensional coverage; no installed-machine bore or kit application. Parker2H European catalogue,printed p.2 Printed pp.2 and32: mounting styles and pressure limitations; historic catalogue edition, current configuration unverified Manufacturer documentary reference; not a HeavyEQ machine measurement HY07-1110/UK; filename indicates2017, definitive current publication date not established No named machine application or serial fitment established Parker: European 2H catalogue HY07-1110/UK ↗ |
| Family dimensional-range upper bore | 304.8 mmParker2H European catalogue,printed p.2 | Scope & sourceCatalogue family dimensional coverage; not a universal mounting/pressure capability. Parker2H European catalogue,printed p.2 Printed pp.2 and32: mounting styles and pressure limitations; historic catalogue edition, current configuration unverified Manufacturer documentary reference; not a HeavyEQ machine measurement HY07-1110/UK; filename indicates2017, definitive current publication date not established No named machine application or serial fitment established Parker: European 2H catalogue HY07-1110/UK ↗ |
Assembly intelligence
Know what the reference includes
Seal kit
A kit has its own issuer and supported assembly revision. Its contents and materials require documentation; a kit is not a complete rebuild.
Installed position
Boom, stick, bucket, lift, steering and stabilizer positions are separate investigations. Preserve replacements made during earlier repairs.
Variants & relationship boundaries
Construction and mounting variations remain separate from the seal-kit identity. Manufacturer-documented replacement packages can require additional hoses or brackets; a directional package is not a reversible one-part interchange.
How directional replacement evidence works →Application evidence
Research identity is separate from installed fitment
- Accepted research scope
- Component family profile
- Serial-specific installation
- Not established
- Before ordering
- Confirm the actual assembly, configuration, applicable manufacturer evidence and serial/build restrictions.
Model names, physical resemblance, dimensions and seller-reported associations cannot replace that evidence. No universal interchangeability is implied.
Identification workflow
Build a useful identification record
- Record the machine identity and actual cylinder position; retain private serial/PIN information securely.
- Capture accessible cylinder maker, full assembly number, revision and repair history.
- Obtain documented bore, rod, stroke, mounting datums and port interfaces for that assembly.
- Resolve the kit, gland and piston revision; define the inspection, supplied contents and testing scope with a qualified source.
What these specifications mean
Bore, rod diameter, stroke and pin-to-pin length answer different questions. A common bore cannot resolve a seal groove or mounting interface. The Parker reference below is an independently scoped industrial family example, never a default mobile-machine cylinder rating.
Full reference library
Detailed research & identification evidence
The original technical record, source-qualified facts and unresolved questions remain below.
Component specification brief • Values require an exact manufacturer item
Identify the cylinder itself and its installed position. A seal kit, rod, barrel and complete cylinder are different sourcing items; a machine model alone may not distinguish a revised cylinder.
Technical selection record
| Property | Record this | Interpretation |
|---|---|---|
| Cylinder identity | Installed assembly code, revision and circuit position | A replacement cylinder can differ from factory build information. |
| Geometry | Documented bore, rod, stroke, mounting and port details | Retain measurement units and the source/measurement basis. |
| Seal context | Documented kit identity, material and component revision | Do not infer kit composition from the generic word seal. |
| Operating context | Applicable fluid, temperature and circuit requirements | Actual values require the relevant manufacturer specification. |
Inspection and purchasing questions
Request measured condition and a defined repair/test scope. Ask whether the quote covers seals only or also rod, bore, gland and mounting damage.
Service boundaries
Disassembly, pressure testing, load support and machining limits require qualified service and source-specific procedures.
Source references
- Caterpillar: Generic service component classification ↗ · observed 2026-10-15
- Parker: Hose and connection catalogue access ↗ · observed 2026-10-15
Technical research & specification evidence
Cylinder and seal-kit identification: geometry versus assembly
The same visible leak can lead to very different sourcing scopes: a seal kit, gland, rod, barrel, mounting component or complete cylinder. Define the assembly boundary before comparing numbers.
Separate functional dimensions
Bore diameter, rod diameter and stroke describe different properties. Stroke is not the exposed rod length in an arbitrary machine position; pin-to-pin length is also a separate mounting measurement. A useful worksheet records each definition and the reference condition used. Mark a field as measured only when the observation method and qualified source are retained. Do not calculate hidden geometry from a photograph or infer a cylinder revision from the carrier model.
A seal system contains different interfaces
Trelleborg publishes piston-seal families with different configurations. That supports distinguishing the piston interface from a rod interface, wiper and guide arrangement; it does not identify a kit for an unknown cylinder. Seal profile, groove geometry, material and supporting elements need the exact assembly documentation. A matching nominal diameter cannot resolve those variables. Keep each quoted kit identity connected to the cylinder maker, assembly number and revision that actually support it.
Original comparison: quote scope matrix
Compare a seals-only quote against a complete-cylinder quote using separate rows for rod condition, bore condition, gland, piston, mounts and testing scope. A low-priced kit and a rebuilt cylinder are not equivalent commercial scopes. The useful technical question is which interfaces were assessed and which remain unknown. Record whether any replacement includes mounting bushes or bearings instead of assuming they are supplied with the cylinder. No general inspection limit follows from the word rebuilt.
Document modifications and provenance
A replacement fitted during a previous repair may break the relationship between factory build data and the installed unit. Preserve accessible tags, position, port orientation and repair history, while keeping private serial information out of public article text. If a source documents a replacement package with additional hoses or brackets, preserve those requirements directionally. Do not generalize a conditional package into a one-for-one swap. Disassembly, stored energy, load support, machining and pressure testing require the correct qualified procedure.
Specification evidence record
Published values retain their exact reference scope. Empty fields mean the value has not been established; they never mean zero. General model associations do not establish installed or serial-specific fitment.
| Property | Value / status | Scope and interpretation |
|---|---|---|
| Cylinder bore | Not yet documented | Exact assembly drawing or qualified documented measurement |
| Rod diameter | Not yet documented | Separate from bore and seal outside diameter |
| Stroke and mounting length | Not yet documented | Define reference positions and source separately |
| Seal profile and material | Not yet documented | Cylinder revision and groove evidence required |
| Rated pressure | Not yet documented | Manufacturer rating, not a field setting or test pressure |
Unresolved technical and source questions (2)
- Cylinder revision, groove dimensions and kit composition
- Pressure ratings and safe service procedures
Research sources and scope
- Trelleborg: hydraulic piston seals ↗ · component manufacturer first party · checked 2026-10-15
Product-family distinction; no installation dimensions extracted
SELECTED_FACTS_AND_ORIGINAL_ANALYSIS_ONLY; no reproduction licence established
Original HeavyEQ analysis and selected source facts. No catalogue reproduction licence, manufacturer endorsement or machine-specific compatibility is implied.
Cylinder identification: geometry, mounting and independent seal-kit scope
General component authority; manufacturer references are independently scoped
A cylinder is an assembly with several sealing and mechanical interfaces. The European Parker2H reference below illustrates how a manufacturer family must remain separate from a particular machine cylinder.
Define the supplied assembly
Separate the complete cylinder from the tube, rod, gland, piston, mounts and seal kit. A quote can legitimately cover different combinations. On equipment, the installed position also matters: boom, stick, bucket, lift, steering, blade and stabilizer cylinders should not be merged because their outer dimensions appear similar. Begin with the accessible assembly identification and its position. A carrier model or engine identity cannot resolve a changed gland or a rod fitted during a previous repair.
A bounded industrial reference
Parker’s European HY07-1110/UK catalogue describes its2H tie-rod family and mounting variants. The selected dimensions below identify the stated family range; they do not identify the bore of a mobile-machine cylinder. Its headline pressure category is conditional:mounting, rod configuration, duty and other restrictions can impose lower limits. The dated catalogue reference is retained without asserting that it is the newest configuration. No Parker mounting drawing, force table, seal list or workshop procedure is reproduced.
Bore,rod,stroke and envelope are different definitions
Bore defines the internal cylinder diameter and nominal piston area. Rod diameter defines a different cross section. Stroke describes designed travel between defined endpoints; it is not an arbitrary visible rod extension. Pin-to-pin dimensions describe the complete mounting envelope in a specified condition. Keep these definitions and datums beside each recorded value. A qualified measured observation must retain its method, unit and author; a photograph or generated technical portrait must not become dimensional evidence.
Why matching bore does not identify a seal kit
A seal kit has its own issuer identity and supported cylinder revision. Piston sealing, rod sealing, wiping, guidance and static sealing are different interfaces. Groove geometry, seal profile, material, rod size and gland construction can change the required kit. An identical nominal bore leaves those questions unanswered. Preserve a replaced gland or rod in the as-rebuilt record and request evidence linking the proposed kit to that current construction. Do not reconstruct an OEM bill of materials from generic seal names.
Ideal force belongs to a separate analysis layer
Pressure multiplied by effective area gives an idealized hydraulic-force relationship. A retract calculation uses the annular area after subtracting the rod cross section. Neither result is a bucket digging force, a rated lift capacity or an allowable stabilizer load. Linkage geometry, structure, joints, friction, pressure conditions and the certified equipment configuration remain independent. The existing equipment specifications remain the authority for sourced machine performance; this cylinder reference cannot replace those ratings.
Identification and refurbishment record
Record machine identity, generation and region; exact cylinder position; accessible maker and assembly markings; source document revision; actual bore/rod/stroke and mounting data where legitimately obtained; and repair history. Keep private serial information out of the public article. For a rebuilt proposal, distinguish the original identity from the reported condition and alterations. Ask which rod, bore, gland, mounting and sealing interfaces were assessed. A seals-only repair scope does not establish that the other components meet the applicable limits.
Conditional replacements and historical limits
Preserve manufacturer-documented extra components as separate requirements instead of converting a package into a reversible one-part substitution. HeavyEQ’s earlier Bobcat work retains that distinction. The same rule applies when a later hose, bracket or mounting change accompanies a cylinder. Historical drawings and present inspection can support different time-specific facts;retain both with their dates. Stored energy, load support, opening, machining and testing require qualified manufacturer-specific procedures. No pressure setting, rebuild instruction or universal wear limit is supplied here.
Specification evidence record
Published values retain their exact reference scope. Empty fields mean the value has not been established; they never mean zero. General model associations do not establish installed or serial-specific fitment.
| Property | Value / status | Scope and interpretation |
|---|---|---|
| European2H headline working-pressure category | 210 bar | Conditional family headline; mounting, rod and duty restrictions can impose lower limits. Not a circuit setting. Reference: Parker2H European industrial tie-rod family,HY07-1110/UK Manufacturer documentary reference; not a HeavyEQ machine measurement Parker: European 2H catalogue HY07-1110/UK ↗ · Printed pp.2 and32: mounting styles and pressure limitations; historic catalogue edition, current configuration unverified HY07-1110/UK; filename indicates2017, definitive current publication date not established No named machine application or serial fitment established |
| Family dimensional-range lower bore | 38.1 mm | Catalogue family dimensional coverage; no installed-machine bore or kit application. Reference: Parker2H European catalogue,printed p.2 Manufacturer documentary reference; not a HeavyEQ machine measurement Parker: European 2H catalogue HY07-1110/UK ↗ · Printed pp.2 and32: mounting styles and pressure limitations; historic catalogue edition, current configuration unverified HY07-1110/UK; filename indicates2017, definitive current publication date not established No named machine application or serial fitment established |
| Family dimensional-range upper bore | 304.8 mm | Catalogue family dimensional coverage; not a universal mounting/pressure capability. Reference: Parker2H European catalogue,printed p.2 Manufacturer documentary reference; not a HeavyEQ machine measurement Parker: European 2H catalogue HY07-1110/UK ↗ · Printed pp.2 and32: mounting styles and pressure limitations; historic catalogue edition, current configuration unverified HY07-1110/UK; filename indicates2017, definitive current publication date not established No named machine application or serial fitment established |
| Installed bore / rod / stroke | Not yet documented | Exact cylinder-specific documentation or qualified measurement required |
| Pin centres and mounting interfaces | Not yet documented | Define retracted/extended condition and measurement datum |
| Seal-kit / gland revision | Not yet documented | Independent exact kit and current gland/piston evidence |
| Actual allowable working pressure | Not yet documented | Must match the full configured cylinder and duty |
Unresolved technical and source questions (2)
- Actual cylinder dimensions,mounting limits and seal-kit application remain unverified.
- The Parker reference is industrial-family context,not an excavator or backhoe installation.
Research sources and scope
- Parker: European 2H catalogue HY07-1110/UK ↗ · manufacturer technical pdf · checked 2026-10-15
Printed pp.2 and32: mounting styles and pressure limitations; historic catalogue edition, current configuration unverified
Selected factual reference and original analysis; catalogue tables,drawings and media are not reproduced.
Original HeavyEQ analysis and selected source facts. No catalogue reproduction licence, manufacturer endorsement or machine-specific compatibility is implied.