{"id":2438,"date":"2026-06-30T08:59:20","date_gmt":"2026-06-30T08:59:20","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/product\/zg-and-hsg-series-hydraulic-cylinders-for-harvester\/"},"modified":"2026-06-30T08:59:31","modified_gmt":"2026-06-30T08:59:31","slug":"zg-and-hsg-series-hydraulic-cylinders-for-harvester","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/sr\/%d0%bf%d1%80%d0%be%d0%b8%d0%b7%d0%b2%d0%be%d0%b4\/zg-and-hsg-series-hydraulic-cylinders-for-harvester\/","title":{"rendered":"ZG and HSG Series Hydraulic Cylinders for Harvester"},"content":{"rendered":"

<\/p>\n

<\/p>\n

\n
\n
\n Agricultural Machinery<\/span>
\n Harvester \u00b7 ZG + HSG Series \u00b7 #39 of 39<\/span>\n <\/div>\n

The Harvest Window.
If the Cylinder Fails,
the Crop Rots.<\/h2>\n

A factory press can wait a week for a replacement cylinder \u2014 the steel doesn’t spoil. A harvester cannot wait a day. The harvest window is 2\u20136 weeks: wheat, corn, rice, soybeans, sugarcane \u2014 every crop has a narrow window when it is ready to cut. Miss it, and rain flattens the crop, frost kills the grain, or over-ripening shatters the seed heads. The harvester cylinder must deliver 16\u201320 hours a day for those 2\u20136 weeks without a single failure. This is the 39th and final product in the Korea Ever-Power industrial cylinder catalogue \u2014 and the one with the highest cost of downtime.<\/p>\n

\n
\n
ZG + HSG<\/div>\n
Dual Series<\/div>\n<\/div>\n
\n
16\u201320h\/day<\/span><\/div>\n
Peak Season Duty<\/div>\n<\/div>\n
\n
8\u201315<\/div>\n
Cylinders per Machine<\/div>\n<\/div>\n
\n
#39<\/div>\n
Final Product<\/div>\n<\/div><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

8\u201315 Cylinders on One Machine \u2014 Every Position Has a Different Job<\/h2>\n

A modern combine harvester uses more hydraulic cylinders than any other agricultural machine \u2014 8\u201315 individual cylinders controlling the header, reel, unloading system, straw management, and machine adjustment functions:<\/p>\n

\n
\n Header height cylinders (2\u20134)<\/strong><\/p>\n

Raise and lower the cutting header to match the ground contour. The most critical cylinders on the harvester \u2014 if the header dips too low, it scoops dirt (damaging the cutter bar and contaminating the grain); if it rides too high, it misses the crop. Modern harvesters use automatic header height control \u2014 the cylinders respond to ground-sensor feedback dozens of times per second, making continuous micro-adjustments as the machine moves across uneven terrain at 6\u201310 km\/h.<\/p>\n<\/p><\/div>\n

\n Reel position cylinders (2)<\/strong><\/p>\n

Adjust the height and fore\/aft position of the reel \u2014 the rotating bat assembly above the header that sweeps standing crop into the cutter bar. Reel position determines how aggressively the crop is gathered. Lodged (fallen) crop needs the reel low and forward; tall standing crop needs the reel high and back. The operator adjusts continuously throughout the day as crop conditions change.<\/p>\n<\/p><\/div>\n

\n Unloading auger cylinder (1\u20132)<\/strong><\/p>\n

Swings the unloading auger (a long tube that transfers grain from the machine’s grain tank to a transport truck) from its stored position along the machine to the unloading position extending sideways over the truck. Fast swing-out\/swing-in \u2014 the operator does not stop the machine to unload; the grain truck drives alongside, and the auger swings out while both machines are moving.<\/p>\n<\/p><\/div>\n

\n Straw chopper \/ spreader (1\u20132)<\/strong><\/p>\n

Adjusts the position or deflector angle of the rear-mounted straw chopper that shreds crop residue and spreads it evenly behind the machine. On machines with a straw walker or rotary separator, additional cylinders control the concave clearance (the gap between the threshing rotor and the concave screen that determines grain separation aggressiveness).<\/p>\n<\/p><\/div>\n<\/p><\/div>\n

Korea Ever-Power supplies both ZG and HSG series cylinders for all harvester positions \u2014 from the precision header height cylinders to the heavy-duty unloading auger swing. Browse the complete agricultural and industrial cylinder range<\/a>.<\/p>\n<\/section>\n

<\/p>\n

\n \"ZG
\n<\/section>\n

<\/p>\n

\n

ZG Series + HSG Series \u2014 Two Ranges, One Machine<\/h2>\n
\n
\n
\n

ZG Series \u2014 Harvester-Specific<\/h3>\n<\/div>\n
\n

Compact envelope design for the tight packaging spaces on a combine harvester \u2014 shorter overall length at the same stroke, reduced barrel outer diameter for clearance between machine frame members, and mounting geometry optimised for harvester linkage pivot points. The ZG series is used where standard HSG cylinders are too long or too wide to fit the harvester’s structural design. Typically applied to header height, reel position, and concave adjustment \u2014 positions where space is most constrained.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n

\n
\n

HSG Series \u2014 Standard Agricultural<\/h3>\n<\/div>\n
\n

The same HSG range used on tractors (#35) \u2014 standard bore\/stroke\/mounting combinations with the full range of clevis, cross tube, trunnion, and flange mountings. Used on the harvester for positions where space is not constrained: unloading auger swing, grain tank cover lift, straw chopper deflector, and general machine adjustment functions. The HSG series’ catalogue availability and standard seal sizes provide the same field-serviceability advantages on the harvester as on the tractor.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n

Most harvesters use a mix of both series \u2014 ZG cylinders in the tight header area and HSG cylinders for the general-purpose positions. Korea Ever-Power supplies both series under a single order, ensuring consistent pressure rating, seal compatibility, and corrosion protection across the entire machine.<\/p>\n<\/section>\n

<\/p>\n

\n
\n

Seasonal Duty \u2014 Maximum Intensity, Then Months of Silence<\/h2>\n

No other cylinder in this 39-product catalogue faces the harvester’s unique duty cycle: a short period of extreme intensity followed by a long period of total inactivity. Both phases create problems:<\/p>\n

\n
\n The harvest: 2\u20136 weeks of 16\u201320 h\/day<\/strong><\/p>\n

During harvest, the machine runs from pre-dawn to after dark \u2014 16\u201320 hours per day, 7 days per week. The header height cylinders cycle continuously (responding to ground contour sensors), the reel cylinders adjust every time the crop condition changes, and the unloading auger cylinder swings out every 10\u201315 minutes when the grain tank fills. Total operating hours during the harvest window: 200\u2013600 hours in 2\u20136 weeks \u2014 compressed intensity that a factory press would spread across 2\u20134 months.<\/p>\n<\/p><\/div>\n

\n The off-season: 8\u201310 months of storage<\/strong><\/p>\n

After harvest, the machine is parked \u2014 often outdoors or in an open-sided shed. The cylinders sit with rods partially extended, exposed to humidity, temperature cycling, and condensation. Chrome surfaces that were wiped clean by constant cycling during harvest now sit static \u2014 allowing moisture to attack any coating defect. Korea Ever-Power specifies chrome plating (50\u201380 \u00b5m) and anti-corrosion rod coatings rated for extended outdoor storage. Contact the hydraulic cylinder engineering team<\/a> for harvester cylinder storage protection options.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

Crop Contamination \u2014 Not Mud, Not Dust, but Chaff, Juice, and Chemicals<\/h2>\n
\n \"Harvester<\/p>\n

The tractor cylinder (#35) faces soil and mud. The excavator cylinder (#37) faces rock dust and concrete grit. The harvester cylinder faces a different contamination profile: crop residue. Wheat chaff, corn husks, soybean dust, sugarcane juice, rice straw fibres \u2014 these materials coat every external surface of the machine during operation.<\/p>\n

Chaff and straw fibres wrap around the rod and pack against the wiper seal \u2014 unlike mud (which compresses), fibrous crop residue tangles and resists the wiper’s scraping action. Sugarcane juice and corn silage acids are mildly corrosive \u2014 attacking chrome surfaces and degrading NBR seals faster than clean water would. Herbicide and fungicide residues from pre-harvest crop spraying add chemical attack to the mechanical contamination.<\/p>\n

Korea Ever-Power addresses these harvester-specific contamination challenges: double-lip wipers with an anti-fibre groove (a circumferential channel that captures fibrous material before it reaches the seal lip), chrome plating rated for mild acid exposure, and seal compounds tested against common agricultural chemical concentrations.<\/p>\n<\/p><\/div>\n

<\/div>\n<\/section>\n

<\/p>\n

\n

Manufacturing \u2014 Seasonal Delivery, Year-Round Quality<\/h2>\n
\n \"Korea<\/p>\n

Harvester OEMs build machines year-round but deliver them in advance of the harvest season \u2014 creating a production peak 3\u20136 months before harvest. Korea Ever-Power aligns cylinder production to this seasonal demand pattern: building inventory in advance, shipping in scheduled batches to match the OEM’s assembly line, and maintaining a safety stock for mid-season emergency replacements.<\/p>\n

Both ZG and HSG series cylinders are manufactured to the same quality standard: bore honed to Ra 0.2\u20130.4 \u00b5m, chrome plating 50\u201380 \u00b5m (outdoor agricultural specification), NBR seals rated for -30 \u00b0C to +100 \u00b0C, and external corrosion protection rated for outdoor storage. The ZG series’ compact design requires tighter machining tolerances on the end cap and gland \u2014 to achieve the shorter overall length at the same stroke.<\/p>\n

Every harvester cylinder is hydrostatic tested at 1.5\u00d7 working pressure. For header height cylinders (the most critical position), Korea Ever-Power also performs a dynamic response test \u2014 verifying that the cylinder responds to a step input within the time required by the automatic header height control system’s response specification.<\/p>\n<\/p><\/div>\n

<\/div>\n<\/section>\n

<\/p>\n

\n

OEM & ODM<\/h2>\n
\n
\n
\n

What You Provide<\/h3>\n<\/div>\n
\n

Harvester model and type (combine, forage, specialty), cylinder function and position, bore, rod, stroke, series preference (ZG compact or HSG standard), system pressure, mounting geometry, port specification, seasonal delivery schedule, and annual volume. For header height cylinders: response time requirement from the automatic height control specification.<\/p>\n<\/div><\/div>\n

\n
\n

What the Factory Delivers<\/h3>\n<\/div>\n
\n

Engineering drawing with bore, rod, stroke, series designation (ZG or HSG), anti-fibre wiper specification, chrome plating 50\u201380 \u00b5m, outdoor storage-rated corrosion protection, and mounting dimensions. Hydrostatic test + dynamic response test (for header height cylinders). Seal kits. Seasonal delivery scheduling. Browse the complete agricultural and industrial cylinder range<\/a> and the full Korea Ever-Power hydraulic cylinder catalogue<\/a>.<\/p>\n<\/div><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

FAQ<\/h2>\n
\n
\n

When should ZG series be specified instead of HSG?<\/h3>\n

When the available installation space (length, diameter, or both) is too small for a standard HSG cylinder at the required stroke. The ZG series achieves a shorter overall length through compact end-cap design and integrated cushions \u2014 at a moderate cost premium over the HSG series. Typical ZG applications: header feederhouse, reel fore\/aft, and concave adjustment \u2014 all positions where the cylinder must fit between closely spaced structural members.<\/p>\n<\/p><\/div>\n

\n

How should harvester cylinders be stored during the off-season?<\/h3>\n

Retract the rod fully into the barrel (to protect the chrome from exposure). Apply a thin film of anti-corrosion oil to any exposed rod surface. Store the machine under cover if possible. Korea Ever-Power’s chrome plating and external finish are rated for outdoor storage, but covered storage extends the corrosion-free interval significantly \u2014 particularly in coastal or high-humidity regions.<\/p>\n<\/p><\/div>\n

\n

Can Korea Ever-Power supply mid-season emergency replacements?<\/h3>\n

Yes \u2014 Korea Ever-Power maintains a safety stock of the most common harvester cylinder bore\/stroke combinations for rapid shipment during the harvest season. For less common configurations, Korea Ever-Power offers priority production scheduling for harvest-emergency orders. Downtime during harvest costs the farmer far more than the cylinder itself \u2014 fast replacement is a service commitment, not an upsell. Browse the full hydraulic cylinder product range<\/a> including forklift cylinders<\/a> and telescopic cylinders<\/a>.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

Related Categories<\/h2>\n
\n <\/p>\n
\n
\"Telescopic\"<\/div>\n
\n
Telescopic Hydraulic Cylinders \u2192<\/div>\n
Dump truck, trailer, hoist.<\/div>\n<\/div>\n<\/div>\n

<\/a>
\n <\/p>\n

\n
\"Forklift\"<\/div>\n
\n
Forklift Hydraulic Cylinders \u2192<\/div>\n
Lift, tilt, steer \u2014 OEM.<\/div>\n<\/div>\n<\/div>\n

<\/a>
\n <\/p>\n

\n
\"AWV\"<\/div>\n
\n
Aerial Work Vehicle Cylinders \u2192<\/div>\n
Scissor, boom, platforms.<\/div>\n<\/div>\n<\/div>\n

<\/a>\n <\/div>\n<\/section>\n

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

ZG and HSG series hydraulic cylinders for harvester \u2014 the final product in the Korea Ever-Power industrial engineering cylinder catalogue, and the only one where cylinder failure is measured not in machine downtime but in lost crop value. The harvest window is 2\u20136 weeks: if the header height cylinder fails on day 3, the remaining wheat stands in the field until the machine is repaired \u2014 and every day of delay risks rain, wind, or frost that destroys the crop. Two series: ZG (harvester-specific compact design) and HSG (standard agricultural for general functions). Korea Ever-Power. ISO 9001. OEM & ODM.<\/div>","protected":false},"featured_media":2439,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[852],"product_tag":[],"class_list":["post-2438","product","type-product","status-publish","has-post-thumbnail","product_cat-industrial-engineering-hydraulic-cylinders","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/product\/2438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/comments?post=2438"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/media\/2439"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/media?parent=2438"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/product_brand?post=2438"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/product_cat?post=2438"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sr\/wp-json\/wp\/v2\/product_tag?post=2438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}