{"id":3116,"date":"2026-07-06T03:00:04","date_gmt":"2026-07-06T03:00:04","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/product\/crawler-crane-frame-support-cylinder-ep-hcyy11112023-model\/"},"modified":"2026-07-06T03:00:32","modified_gmt":"2026-07-06T03:00:32","slug":"crawler-crane-frame-support-cylinder-ep-hcyy11112023-model","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/bg\/product\/crawler-crane-frame-support-cylinder-ep-hcyy11112023-model\/","title":{"rendered":"Crawler Crane Frame Support Cylinder | EP-HCYY11112023 Model"},"content":{"rendered":"

<\/p>\n
Mobile Machinery Hydraulic Cylinder<\/span><\/p>\n

Crawler Crane Frame Support Cylinder
EP-HCYY11112023 \u00b7 \u03a6140mm \u00b7 Stroke 640mm \u00b7 30 MPa \u00b7 40 MPa Max \u00b7 123 kg<\/span><\/h2>\n

The highest-pressure cylinder in the crawler crane family \u2014 operating at 30 MPa working and 40 MPa maximum withstand pressure. The frame support cylinder provides structural bracing for the main crane frame, locking the frame structure in its deployed configuration during lifting operations. At \u03a6140 bore with an 85.7% rod ratio, this cylinder functions as a hydraulically actuated structural member that can be extended for operation and retracted for transport.<\/p>\n

\n
\u03a6140<\/span>Bore<\/span><\/div>\n
640mm<\/span>Stroke<\/span><\/div>\n
30 MPa<\/span>Working Pressure<\/span><\/div>\n
40 MPa<\/span>Max Pressure<\/span><\/div>\n
123 kg<\/span>Weight<\/span><\/div>\n<\/div>\n<\/section>\n
\n

Technical Specifications<\/h2>\n
<\/div>\n

\"Crawler\u25b2 Dimension Drawing<\/span><\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Product Name<\/td>\nCrawler Crane Frame Support Cylinder<\/td>\n<\/tr>\n
Cylinder Model<\/td>\nEP-HCYY11112023<\/td>\n<\/tr>\n
Bore (D)<\/td>\n\u03a6140 mm<\/td>\n<\/tr>\n
Rod (d)<\/td>\n\u03a6120 mm<\/td>\n<\/tr>\n
Stroke (S)<\/td>\n640 mm<\/td>\n<\/tr>\n
Installation Distance (L)<\/td>\n983 mm<\/td>\n<\/tr>\n
Working Pressure<\/td>\n30 MPa<\/td>\n<\/tr>\n
Maximum Withstand Pressure<\/td>\n40 MPa<\/td>\n<\/tr>\n
Weight<\/td>\n123 kg<\/td>\n<\/tr>\n
Application<\/td>\nLattice Boom Crawler Crane<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
\"Crawler\u25b2 Crawler Crane Frame Support Cylinder | EP-HCYY11112023 Model<\/span><\/section>\n
\n

How the Frame Support Cylinder Braces the Crane Structure<\/h2>\n
<\/div>\n

\"Crawler<\/p>\n

The crawler crane frame must be rigid during lifting \u2014 any flexibility in the frame allows the superstructure to twist or deflect under eccentric loads, reducing both stability and lifting capacity. The frame support cylinder locks the frame in its extended configuration, acting as a rigid strut between frame members.<\/p>\n

At 30 MPa working pressure and 40 MPa maximum \u2014 the highest pressure rating in the entire crawler crane range \u2014 this cylinder must withstand the full structural loads transmitted through the crane frame during heavy lifts. The 1.33\u00d7 safety factor (30\u219240 MPa) is tighter than typical hydraulic cylinders because the frame support operates primarily as a static structural member, not a dynamic actuator.<\/p>\n

The 85.7% rod ratio (\u03a6120\/\u03a6140) confirms this is a column\/strut cylinder \u2014 the thick rod carries compressive loads transmitted through the frame structure. The 640 mm stroke provides the deployment range needed to extend the frame bracing from its folded transport position. Browse the full mobile machinery hydraulic cylinder<\/a> range.<\/p>\n<\/section>\n

\n

30 MPa \/ 40 MPa \u2014 Why the Highest Pressure?<\/h2>\n
<\/div>\n
\n
Structural Load Path<\/strong><\/p>\n

The frame support cylinder is part of the crane’s structural load path \u2014 it transmits overturning moments, torsional loads, and dynamic forces from the superstructure through the frame to the tracks. The cylinder must be as strong as a steel strut of the same cross-section.<\/p>\n<\/div>\n

85.7% Rod Ratio = Structural Column<\/strong><\/p>\n

The \u03a6120 rod inside the \u03a6140 bore leaves only 10 mm of wall thickness \u2014 this cylinder is essentially a solid steel column with a thin hydraulic sleeve around it. The hydraulics are only needed for extension\/retraction; during operation, it functions as a rigid mechanical member.<\/p>\n<\/div>\n

40 MPa Burst \u2014 Earthquake-Level Loads<\/strong><\/p>\n

The 40 MPa maximum withstand pressure accounts for the extreme transient loads that can occur during seismic events, sudden load release, or emergency swing stops. The frame support must survive these peak loads without failure.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"Crawler<\/section>\n
\n

Crawler Crane Cylinder Family<\/h2>\n
<\/div>\n

Korea Ever-Power manufactures 8+ cylinder models for lattice boom crawler cranes \u2014 luffing, rack support, frame support, boom angle, and supplementary bracing cylinders:<\/p>\n

\n
EP-HCYY11112018<\/strong><\/a><\/p>\n

Luffing Cyl. \u03a6280, 1155kg<\/p>\n<\/div>\n

EP-HCYY11112022<\/strong><\/a><\/p>\n

Rack Support Cyl. \u03a670, 48kg<\/p>\n<\/div>\n

EP-HCYY11112023 \u2190 this product<\/strong><\/a><\/p>\n

Frame Support Cyl. \u03a6140, 123kg<\/p>\n<\/div>\n

EP-HCYY11112021\/24\/25\/26\/27<\/strong><\/a><\/p>\n

Boom Angle + Additional Support (5 models)<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\n

Why Choose Korea Ever-Power<\/h2>\n
<\/div>\n

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 \u2014 ensuring every cylinder meets OEM-grade performance standards.<\/p>\n

\"Korea<\/p>\n

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<\/a> team for pricing and lead time.<\/p>\n<\/section>\n

\"Hydraulic<\/section>\n
\n

Frequently Asked Questions<\/h2>\n
<\/div>\n
\n
\n

Why is the working pressure (30 MPa) higher than the luffing cylinder (31.5 MPa)?<\/h3>\n

The frame support cylinder has a smaller bore (\u03a6140 vs \u03a6280) but must resist comparable structural loads. Higher pressure compensates for the smaller piston area \u2014 producing the force needed from a more compact cylinder that fits within the frame structure.<\/p>\n<\/div>\n

\n

Is this cylinder hydraulically active during lifting?<\/h3>\n

No \u2014 the frame support cylinder extends to deploy the frame, then a mechanical lock or check valve holds it in position. During lifting, it functions as a passive structural member. The hydraulic system is only active during setup (extension) and teardown (retraction).<\/p>\n<\/div>\n

\n

How many frame support cylinders does a crawler crane use?<\/h3>\n

Typically 4\u20136 per crane \u2014 front and rear frame positions, left and right sides. The EP-HCYY11112023 is one variant; related models (EP-HCYY11112025, 27) serve front and behind positions with different geometries.<\/p>\n<\/div>\n

\n

Does Korea Ever-Power supply the complete crawler crane cylinder set?<\/h3>\n

Yes \u2014 luffing, rack support, frame support, boom angle, and additional bracing cylinders are all available. Also available: truck crane cylinders (EP-HCYY11112013\u201317). Browse the mobile machinery hydraulic cylinder<\/a> range.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\n

What Our Customers Say<\/h2>\n
<\/div>\n
\n
\n
\u2605\u2605\u2605\u2605\u2605<\/span>Mar 2026<\/span><\/div>\n

“The frame support cylinders on our crawler crane had started weeping oil \u2014 a serious safety concern for a structural member. Korea Ever-Power’s EP-HCYY11112023 replacements passed our 40 MPa proof test without issue. The 123 kg weight required a small chain hoist for installation.”<\/p>\n

T. Hoffmann<\/strong> \u2014 Crane Safety Inspector, Austria<\/p>\n<\/div>\n

\n
\u2605\u2605\u2605\u2605\u2606<\/span>Sep 2025<\/span><\/div>\n

“Good quality at competitive pricing. The \u03a6140 bore and 30 MPa rating match our original crane specification. Chrome finish on the \u03a6120 rod is clean \u2014 important for a cylinder that sits exposed to weather during crane setup periods.”<\/p>\n

S. Kim<\/strong> \u2014 Heavy Equipment Procurement, South Korea<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Related Hydraulic Cylinder Categories<\/h2>\n
<\/div>\n
\n
\"ForkliftForklift Hydraulic Cylinders \u2192<\/span><\/a><\/div>\n
\"ScissorAerial Work Vehicle Cylinders \u2192<\/span><\/a><\/div>\n
\"BoomOffshore Hydraulic Cylinders \u2192<\/span><\/a><\/div>\n
\"ForkliftIndustrial Engineering Cylinders \u2192<\/span><\/a><\/div>\n<\/div>\n<\/section>\n

<\/main><\/p>","protected":false},"excerpt":{"rendered":"

Crawler crane frame support cylinder EP-HCYY11112023 operates at 30 MPa working pressure and 40 MPa maximum \u2014 the highest pressure rating in the crawler crane range. This cylinder functions as a hydraulically actuated structural strut, locking the main crane frame in its deployed configuration. Bore \u03a6140 mm, rod \u03a6120 mm (85.7% rod ratio \u2014 essentially a solid steel column with a hydraulic sleeve). Stroke 640 mm, weight 123 kg. Extends for operation, mechanically locks in position, retracts for transport. Part of the crane structural load path. Korea Ever-Power. ISO 9001.<\/div>","protected":false},"featured_media":3117,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[854],"product_tag":[],"class_list":["post-3116","product","type-product","status-publish","has-post-thumbnail","product_cat-mobile-machinery-hydraulic-cylinders","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/product\/3116","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/comments?post=3116"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/media\/3117"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/media?parent=3116"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/product_brand?post=3116"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/product_cat?post=3116"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/bg\/wp-json\/wp\/v2\/product_tag?post=3116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}