{"id":2287,"date":"2026-06-26T07:56:09","date_gmt":"2026-06-26T07:56:09","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/?post_type=product&p=2287"},"modified":"2026-06-26T07:56:09","modified_gmt":"2026-06-26T07:56:09","slug":"professional-craftsmanship-dump-truck-4-stage-hydraulic-cylinder","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/zh\/product\/professional-craftsmanship-dump-truck-4-stage-hydraulic-cylinder\/","title":{"rendered":"Professional Craftsmanship Dump Truck 4 Stage Hydraulic Cylinder"},"content":{"rendered":"
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<\/p>\n

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4-STAGE \u2014 THE BALANCED CHOICE<\/span>
\nPROFESSIONAL CRAFTSMANSHIP<\/span><\/div>\n
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4 Stage
\nDump Truck Cylinder
\nProfessional Craftsmanship<\/span><\/h2>\n

The 2-stage is the simplest. The 5-stage is the most compact. The 4-stage telescopic hydraulic cylinder<\/a> sits between them \u2014 compact enough for most large dump truck frames, but with one fewer seal set than the 5-stage. For dump trucks in the 10\u201330 tonne range, the 4-stage is the most commonly specified configuration: the engineering sweet spot where compactness, reliability, cost, and force output are all balanced.<\/p>\n<\/div>\n

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Stages<\/span>4<\/span><\/div>\n
Bore<\/span>2\u20136\u2033<\/span><\/div>\n
Retracted<\/span>~32\u201340%<\/span><\/div>\n
Seal Sets<\/span>3<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

The 4-stage retracts to approximately 32\u201340% of its extended length \u2014 compact enough for the majority of dump truck chassis frames in the 10\u201330 tonne class, but without the 5-stage’s four seal sets (the 4-stage has three). One fewer seal set means one fewer potential leak path, slightly less manufacturing complexity, and a cost point between the 3-stage and 5-stage. Korea Ever-Power manufactures this 4-stage cylinder with professional craftsmanship: CNC-machined barrel sections, precision-honed bores, qualified welding procedures, and branded seals \u2014 producing a telescopic cylinder built to last under the repetitive, heavy-load demands of dump truck tipping duty.<\/p>\n<\/section>\n

\"Telescopic\u00a0<\/p>\n

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4 Stage Dump Truck Cylinder \u2014 Customisation Parameters<\/h2>\n
\n\n\n\n\n\n\n\n\n
Stage Count<\/td>\n4 stages (outer barrel + 3 inner plungers)<\/td>\n<\/tr>\n
Bore \/ Rod \/ Stroke \/ Pin<\/td>\n2\u20136\u2033 \/ 1.125\u20134\u2033 \/ 4\u2013100\u2033 \/ 0.5\u20132\u2033 (all customisable)<\/td>\n<\/tr>\n
Port Options<\/td>\nG \/ SAE \/ NPT \/ M<\/td>\n<\/tr>\n
Body \/ Craftsmanship<\/td>\nSteel \/ CNC machined, precision honed, qualified welding<\/td>\n<\/tr>\n
Certification \/ Lead Time<\/td>\nISO 9001 \/ 25\u201335 days<\/td>\n<\/tr>\n
Warranty<\/td>\n1 year<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

<\/p>\n

\"4<\/section>\n

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Why 4-Stage Is the Most Popular Choice for Medium-to-Large Dump Trucks<\/h2>\n

The 4-stage telescopic cylinder occupies the practical middle ground in the stage count spectrum. It avoids the excessive retracted length of the 3-stage while avoiding the excessive complexity and cost of the 5-stage. For the majority of dump trucks in the 10\u201330 tonne class, the 4-stage delivers the required stroke within the available frame depth \u2014 making it the most commonly specified stage count for this vehicle range.<\/p>\n

\n\n\n\n\n\n\n\n
Stage<\/th>\nRetracted Ratio<\/th>\nSeal Sets<\/th>\nCost Index<\/th>\nBest For<\/th>\n<\/tr>\n<\/thead>\n
3<\/td>\n~40\u201350%<\/td>\n2<\/td>\n1.0\u00d7<\/td>\nSmall-medium trucks with deeper frames<\/td>\n<\/tr>\n
4<\/td>\n~32\u201340%<\/td>\n3<\/td>\n~1.2\u00d7<\/td>\nMost 10\u201330t dump trucks (sweet spot)<\/td>\n<\/tr>\n
5<\/td>\n~25\u201330%<\/td>\n4<\/td>\n~1.4\u20131.6\u00d7<\/td>\nTight frames only \u2014 maximum compactness<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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4-Stage advantage over 3-Stage:<\/strong><\/p>\n

Approximately 15\u201320% shorter retracted length at the same stroke. This difference \u2014 typically 100\u2013200 mm \u2014 is often the margin that determines whether the cylinder fits under the dump truck frame or not. For trucks in the 10\u201320 tonne class with standard frame depths of 500\u2013700 mm, the 4-stage fits where the 3-stage does not.<\/p>\n<\/div>\n

4-Stage advantage over 5-Stage:<\/strong><\/p>\n

One fewer seal set (3 vs 4), simpler manufacturing, approximately 15\u201325% lower cost, and higher force on the innermost stage (the 4th stage retains more bore area than the 5th stage in a 5-stage cylinder). If the 4-stage retracted length fits the frame, the 5-stage offers no benefit \u2014 only added cost and complexity.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Professional Craftsmanship \u2014 The Manufacturing Process Behind the 4-Stage<\/h2>\n

“Professional craftsmanship” means the manufacturing process follows controlled, repeatable procedures at every step \u2014 from raw material inspection to final pressure test. Each procedure is documented, each tool is calibrated, and each operator is qualified for the operation they perform.<\/p>\n

\"Professional<\/p>\n

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CNC Machining<\/strong><\/p>\n

Barrel sections, end caps, port bosses, and mounting brackets are machined on CNC lathes and mills \u2014 not manual machines. CNC provides repeatable dimensional accuracy across production batches: the 100th cylinder matches the 1st cylinder within the programmed tolerance. For 4-stage cylinders with four barrel sections, CNC consistency ensures the nested stages fit together with the correct clearances every time.<\/p>\n<\/div>\n

Precision Bore Honing<\/strong><\/p>\n

Each of the four stage bores is honed to a controlled surface finish using dedicated honing machines. The honing process creates the cross-hatch pattern that retains the oil film for seal lubrication \u2014 too rough and the seal wears prematurely; too smooth and the oil film breaks down. Professional honing targets the specific surface finish range that maximises seal life for each bore diameter.<\/p>\n<\/div>\n

Qualified Welding<\/strong><\/p>\n

Pressure-containing welds are executed by certified welders following qualified welding procedure specifications (WPS). Each weld type (end cap, port boss, mounting bracket) has its own WPS that defines the current, voltage, travel speed, and pre\/post heat treatment. The welder qualification and WPS compliance are core elements of the ISO 9001 quality management system \u2014 the cylinders cannot be manufactured without them.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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OEM & ODM<\/h2>\n
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What You Provide<\/h3>\n<\/div>\n
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Bore, rod, stroke, retracted length, mounting type, port thread (G\/SAE\/NPT\/M), working pressure, and dump truck model or chassis dimensions. For replacements: old cylinder measurements. For new truck designs: chassis cross-section drawing showing the cylinder envelope.<\/p>\n<\/div>\n<\/div>\n

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What Ever-Power Delivers<\/h3>\n<\/div>\n
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Drawing 2\u20133 days. Samples available. Production 25\u201335 days. 100% pressure test with certificate. 1-year warranty. Contact Korea Ever-Power<\/a> for quotation. Annual blanket agreements for OEM volume.<\/p>\n<\/div>\n<\/div>\n

 <\/p>\n<\/div>\n

\"Telescopic<\/p>\n

4 Stage Dump Truck Cylinder \u2014 Technical FAQ<\/h2>\n
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How does 4-stage cost compare to 3 and 5-stage?<\/h3>\n

At the same bore and stroke: 4-stage costs approximately 15\u201320% more than 3-stage (one additional machined bore, one additional seal set) and approximately 15\u201325% less than 5-stage (one fewer bore, one fewer seal set). The 4-stage sits at the cost midpoint \u2014 more compact than 3-stage, less expensive than 5-stage.<\/p>\n<\/div>\n

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Is 4-stage available in double-acting?<\/h3>\n

Yes. Korea Ever-Power produces 4-stage telescopic cylinders in both single-acting and double-acting. Double-acting 4-stage is the standard for front-push hoist dump trucks in the 15\u201325 tonne class \u2014 providing controlled raise and lower at the most popular stage count. Specify acting type when ordering.<\/p>\n<\/div>\n

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What force does the 4th (innermost) stage produce?<\/h3>\n

After three bore reductions, the 4th stage typically retains approximately 25\u201340% of the outer barrel’s piston area \u2014 producing 25\u201340% of the first stage’s force at the same system pressure. For a 10\u201330 tonne dump truck, this 4th-stage force is still sufficient to complete the tipping cycle because gravity is actively assisting by the time the 4th stage extends.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Field Reports<\/h2>\n
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P<\/div>\n
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Pete C. \u2014 Medium Dump Truck Body Builder<\/div>\n
Verified Purchase \u00b7 Illinois, USA \u00b7 May 2025<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

The 4-stage is our standard specification for 15\u201325 tonne dump truck bodies. We evaluated 3-stage (too long retracted for our standard frame), 5-stage (unnecessarily complex and 25% more expensive), and settled on 4-stage as the sweet spot. Ever-Power 4-stage, 5-inch bore, 80-inch stroke, SAE ports. 18 units delivered over 6 months. CNC machining quality is evident in the dimensional consistency \u2014 every barrel section is concentric, the stages extend smoothly, and the bore finish is uniform across all units. Professional product.<\/p>\n<\/div>\n

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M<\/div>\n
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Martinez Trucks SA \u2014 Tipper Manufacturer<\/div>\n
Verified Purchase \u00b7 Spain \u00b7 March 2025<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We build 12-tonne tippers for the Spanish construction market. The 4-stage from Ever-Power delivers 1,800 mm stroke in a 640 mm retracted package \u2014 fits our frame with 40 mm clearance. BSP G-thread, 4-inch bore. The weld quality on the end caps is visibly professional \u2014 clean, continuous, no porosity. We’ve ordered 40 units across 4 batches. The honing quality is consistent \u2014 we’ve never had a seal failure attributable to bore finish. Annual agreement pricing now in effect.<\/p>\n<\/div>\n

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R<\/div>\n
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Ravi S. \u2014 Fleet Procurement Manager<\/div>\n
Verified Purchase \u00b7 February 2025<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2606<\/div>\n<\/div>\n

Replaced the 4-stage hoist cylinder on a 20-tonne dump truck. The Ever-Power cylinder matched the original dimensions precisely. Four stars because the paint finish on the barrel was slightly thinner than expected \u2014 cosmetic only, no functional impact. We’re adding a clear-coat to our prep procedure before installation. The craftsmanship of the machining, honing, and welding is excellent \u2014 no complaints on the engineering quality. The cylinder operates flawlessly after 4 months of daily hauling.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Other Hydraulic Cylinder Categories<\/h2>\n
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\"Forklift\"<\/p>\n

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Forklift Cylinders \u2192<\/a><\/h3>\n

Lifting, tilt, steering. HCYY OEM parts.<\/p>\n<\/div>\n<\/div>\n

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\"AWV\"<\/p>\n

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AWV Cylinders \u2192<\/a><\/h3>\n

Scissor\/boom lift \u2014 15 types.<\/p>\n<\/div>\n<\/div>\n

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\"All\"<\/p>\n

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All Cylinders \u2192<\/a><\/h3>\n

Complete catalogue.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"
4-stage telescopic hydraulic cylinder for dump trucks \u2014 the balanced configuration between the 3-stage and 5-stage extremes. Where 3-stage is too long when retracted and 5-stage is more complex and expensive than necessary, the 4-stage occupies the engineering middle ground: compact enough for most large dump truck frames at approximately 32\u201340% retracted-to-extended ratio, with three sets of inter-stage seals (one fewer than 5-stage). Professional craftsmanship: CNC-machined barrels, precision-honed bores, qualified welding procedures, branded seals. Custom bore 2\u20136 inch, stroke 4\u2013100 inch. G\/SAE\/NPT\/M. ISO 9001. Korea Ever-Power OEM & ODM.<\/div>","protected":false},"featured_media":2275,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[851],"product_tag":[],"class_list":["post-2287","product","type-product","status-publish","has-post-thumbnail","product_cat-telescopic-hydraulic-cylinder","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product\/2287","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/comments?post=2287"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/media\/2275"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/media?parent=2287"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product_brand?post=2287"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product_cat?post=2287"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product_tag?post=2287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}