{"id":2215,"date":"2026-06-23T08:59:22","date_gmt":"2026-06-23T08:59:22","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/?post_type=product&p=2215"},"modified":"2026-06-23T08:59:22","modified_gmt":"2026-06-23T08:59:22","slug":"lift-hydraulic-cylinder-for-cart-pallet-truck-lift-cylinder","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/zh\/product\/lift-hydraulic-cylinder-for-cart-pallet-truck-lift-cylinder\/","title":{"rendered":"Lift Hydraulic Cylinder for Cart \u2014 Pallet Truck Lift Cylinder"},"content":{"rendered":"
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<\/p>\n

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Lift Hydraulic Cylinder for Cart \u2014 The Compact Heart of Every Pallet Truck<\/h2>\n

Hand pallet trucks are the most numerous piece of material handling equipment in the world. There are an estimated 5\u20138 million in active use globally, and every single one relies on one hydraulic cylinder \u2014 the lift cylinder for cart \u2014 to raise the forks off the ground. No electric motor, no engine, no external power source. The operator pumps the handle, a built-in foot pump pressurises a few cubic centimetres of oil per stroke, and this compact cylinder converts that manual input into the force required to lift 2,000\u20133,000 kg of loaded pallet just high enough to clear the floor.<\/p>\n

\"Lift<\/p>\n

Korea Ever-Power produces 4 models of this cylinder with bores from \u03a640 to \u03a645, strokes from 120 to 155 mm, and working pressures from 18 to 25 MPa. Despite being the smallest and lightest cylinder in the entire forklift hydraulic cylinder<\/a> catalogue, it operates at the highest pressure per unit bore area \u2014 a direct consequence of the physics of generating high force from a small piston driven by a manual pump.<\/p>\n

\n
\n
\u03a640\u201345<\/div>\n
Bore (mm)<\/div>\n<\/div>\n
\n
120\u2013155<\/div>\n
Stroke (mm)<\/div>\n<\/div>\n
\n
25<\/div>\n
MPa Max<\/div>\n<\/div>\n
\n
8<\/div>\n
Parts Only<\/div>\n<\/div>\n
\n
3.6\u20136.5<\/div>\n
Weight (kg)<\/div>\n<\/div>\n<\/div>\n<\/section>\n
\n

Complete Specifications \u2014 4 Pallet Truck Lift Cylinder Models<\/h2>\n

Four models cover standard-duty, heavy-duty, and compact pallet truck platforms. Note the two port types: M12\u00d71.5 metric threaded ports connect to threaded hydraulic lines; \u03a66 push-in ports accept 6 mm OD nylon tube connections common on lightweight pallet truck pump assemblies.<\/p>\n

\n\n\n\n\n\n\n\n\n
Drawing Number<\/th>\nBore (D)<\/th>\nRod (d)<\/th>\nStroke (S)<\/th>\nInstall Dist (L)<\/th>\nPressure<\/th>\nPorts<\/th>\nWeight<\/th>\n<\/tr>\n<\/thead>\n
AIMBN156-620000-001<\/td>\n\u03a645<\/td>\n\u03a640<\/td>\n125<\/td>\n313<\/td>\n18 MPa<\/td>\nM12\u00d71.5<\/td>\n6.5 kg<\/td>\n<\/tr>\n
AIMBJ150-620000-000<\/td>\n\u03a640<\/td>\n\u03a635<\/td>\n155<\/td>\n354.7<\/td>\n22 MPa<\/td>\n\u03a66 push-in<\/td>\n6.5 kg<\/td>\n<\/tr>\n
AIMBA200-620000-000<\/td>\n\u03a645<\/td>\n\u03a640<\/td>\n155<\/td>\n355<\/td>\n20 MPa<\/td>\n\u03a66 push-in<\/td>\n6.5 kg<\/td>\n<\/tr>\n
EPT18H-301-00<\/td>\n\u03a640<\/td>\n\u03a635<\/td>\n120<\/td>\n233<\/td>\n25 MPa<\/td>\nM12\u00d71.5<\/td>\n3.6 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All dimensions in mm. Installation distance (L) measured at full retraction. \u03a66 push-in ports accept 6 mm OD nylon or polyamide tubing \u2014 push the tube into the port fitting until it clicks; pull the release ring to disconnect. M12\u00d71.5 ports accept standard metric hydraulic fittings with bonded seals. EPT18H is the ultra-compact model for semi-electric pallet trucks with reduced frame height.<\/p>\n<\/section>\n

<\/p>\n

\n

From Handle Pump to Lifted Pallet \u2014 The Complete Hydraulic Cycle<\/h2>\n

The hand pallet truck is one of the simplest closed-loop hydraulic systems in existence. Understanding how the lift cylinder operates within this system is essential for diagnosing problems and selecting the correct replacement.<\/p>\n

\n
\n
1<\/div>\n

Pump Stroke<\/strong><\/p>\n

The operator pushes the handle down (or presses the foot pedal). This drives a small plunger pump that displaces 2\u20135 cc of hydraulic oil per stroke through a one-way valve into the lift cylinder bore.<\/p>\n<\/div>\n

\n
2<\/div>\n

Cylinder Extends<\/strong><\/p>\n

The oil enters the bore below the piston, building pressure until the force on the piston exceeds the load weight. The piston rod extends upward, lifting the fork linkage. Multiple pump strokes accumulate oil volume until the forks reach operating height.<\/p>\n<\/div>\n

\n
3<\/div>\n

Load Holding<\/strong><\/p>\n

The steel ball check valve inside the cylinder blocks the oil return path. The load weight pushes down on the piston, but the trapped oil column cannot escape \u2014 the forks hold position for hours or days without any additional pumping.<\/p>\n<\/div>\n

\n
4<\/div>\n

Controlled Lowering<\/strong><\/p>\n

The operator activates the release lever (typically on the handle). This opens a needle valve that bypasses the check valve, creating a metered return path to the oil reservoir. The load weight pushes the oil back through the needle valve, and the forks descend at a controlled speed.<\/p>\n<\/div>\n<\/div>\n

Number of pump strokes to full lift: <\/strong>
\nFor a \u03a645 bore cylinder with 155 mm stroke: the oil volume required is \u03c0 \u00d7 (22.5)\u00b2 \u00d7 155 = 246,740 mm\u00b3 \u2248 247 cc. At 3 cc per pump stroke, full extension requires approximately 82 handle pumps. At 5 cc per stroke, approximately 49 pumps. This is why operators prefer the minimum number of pump strokes \u2014 every extra pump is physical effort \u2014 and why correct cylinder selection (matching bore to pump displacement) directly affects operator fatigue.<\/span><\/div>\n<\/section>\n
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8 Components \u2014 The Simplest Cylinder, the Highest Reliability<\/h2>\n

Where the forklift tilt cylinder contains 25 parts and the short lift cylinder has 27, the cart lift cylinder achieves its function with just 8 components. This minimalist construction is not a cost-cutting measure \u2014 it is a reliability strategy. Hand pallet trucks operate in the harshest ground-level environments (wet floors, chemical spills, debris, temperature extremes) with minimal maintenance attention. Fewer parts mean fewer failure modes, fewer seals to leak, and a faster field rebuild when service is eventually needed.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
#<\/th>\nComponent<\/th>\nFunction<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nCylinder Housing Assy<\/td>\nPressure vessel, mounting base, port housing<\/td>\n<\/tr>\n
2<\/td>\nU-Ring<\/td>\nPrimary rod seal \u2014 prevents oil leakage past the rod<\/td>\n<\/tr>\n
3<\/td>\nBack-Ring<\/td>\nAnti-extrusion support for the U-Ring under high pressure<\/td>\n<\/tr>\n
4<\/td>\nDust Wiper<\/td>\nPrevents floor debris from entering the rod seal zone<\/td>\n<\/tr>\n
5<\/td>\nPiston Rod<\/td>\nLoad-bearing member, chrome-plated \u03a635 or \u03a640<\/td>\n<\/tr>\n
6<\/td>\nSteel Ball \u25c6<\/td>\nIntegrated check valve seat \u2014 holds load against return flow<\/td>\n<\/tr>\n
7<\/td>\nDu Bush<\/td>\nPTFE-lined rod guide bearing \u2014 eliminates metal-to-metal contact<\/td>\n<\/tr>\n
8<\/td>\nO-Ring<\/td>\nStatic seal between housing sections<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u25c6 Component unique to the cart lift cylinder \u2014 replaces the spring-loaded check valve assembly found in forklift mast cylinders with a simpler, more robust steel ball design.<\/p>\n<\/section>\n

<\/p>\n

\n

The Steel Ball Check Valve \u2014 Load Holding in a Single Component<\/h2>\n

The steel ball (item 6) is the most critical single component in the cart lift cylinder \u2014 and it weighs less than 5 grams. This hardened steel sphere sits in a precision-machined conical seat at the base of the cylinder bore. When the pump delivers oil into the cylinder, the oil pressure lifts the ball off its seat, flows past it, and enters the bore space below the piston. When the pump stroke ends, the oil pressure equalises and the ball drops back onto its seat under its own weight plus the pressure of the oil column above it \u2014 sealing the bore and trapping the oil that holds the load.<\/p>\n

\n
\n

Why a ball instead of a poppet valve?<\/strong><\/p>\n

A spring-loaded poppet check valve (the type used in forklift mast cylinders) requires a spring, a poppet, a guide, and a retainer \u2014 4 parts. The steel ball check valve achieves the same function with 1 part. The ball is self-centring on the conical seat, requires no spring (gravity and oil pressure provide the seating force), and has no moving parts that can fatigue or break. For a cylinder that may sit loaded for days without maintenance attention, this single-part reliability is essential.<\/p>\n<\/div>\n

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The most common failure mode<\/strong><\/p>\n

When a hand pallet truck gradually lowers on its own (the forks sink over minutes or hours), the cause is almost always a contaminated ball seat. A single particle of metal swarf, rust, or floor debris lodged between the steel ball and its seat creates a leak path that allows oil to bleed past the check valve under load pressure. The fix is simple: disassemble, clean the ball and seat, inspect for pitting, and reassemble. If the seat shows visible pitting or scoring, replace the cylinder housing assembly.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Why the Smallest Cylinder Operates at the Highest Pressure<\/h2>\n

The EPT18H model, with its \u03a640 bore and 3.6 kg weight, operates at 25 MPa \u2014 higher than any forklift mast cylinder in the Korea Ever-Power range. This seems counterintuitive: how can the smallest, lightest cylinder handle the highest pressure? The answer is that force equals pressure multiplied by area. A small bore requires higher pressure to generate the same force as a large bore.<\/p>\n

\n\n\n\n\n\n\n\n\n
Cylinder<\/th>\nBore<\/th>\nPressure<\/th>\nLift Force (kN)<\/th>\nEquiv. Mass (kg)<\/th>\n<\/tr>\n<\/thead>\n
Cart \u2014 EPT18H<\/td>\n\u03a640<\/td>\n25 MPa<\/td>\n31.4<\/td>\n3,204<\/td>\n<\/tr>\n
Cart \u2014 AIMBA200<\/td>\n\u03a645<\/td>\n20 MPa<\/td>\n31.8<\/td>\n3,242<\/td>\n<\/tr>\n
Forklift Lift \u2014 \u03a656<\/td>\n\u03a656<\/td>\n18.1 MPa<\/td>\n44.6<\/td>\n4,546<\/td>\n<\/tr>\n
Forklift Tilt \u2014 \u03a6100<\/td>\n\u03a6100<\/td>\n18.1 MPa<\/td>\n142.1<\/td>\n14,485<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Both cart cylinder models produce approximately 31\u201332 kN of lift force \u2014 enough to raise 3,200 kg \u2014 despite vastly different bore and pressure combinations. The EPT18H achieves this in a 3.6 kg package by running at higher pressure, which requires heavier wall thickness relative to bore diameter but saves on overall size and weight. The cart cylinder’s rod-to-bore ratio (0.875\u20130.889) is the highest in the product range, providing the column stability needed to handle high pressure in a compact package.<\/p>\n<\/section>\n

<\/p>\n

\n

Pallet Truck Type Compatibility<\/h2>\n

\"Hydraulic<\/p>\n

\n
\n

Standard Hand Pallet Trucks (2,000\u20132,500 kg)<\/h3>\n

The most common pallet truck type in warehouses worldwide. Fork length 1,150 mm, fork width 540\u2013685 mm. Uses the AIMBN156 or AIMBA200 models (\u03a645 bore) with 125\u2013155 mm stroke. The 18\u201320 MPa pressure rating matches the standard pump assembly found on most commercial-grade hand pallet trucks.<\/p>\n<\/div>\n

\n

Heavy-Duty Pallet Trucks (3,000\u20135,000 kg)<\/h3>\n

Reinforced pallet trucks for heavy loads \u2014 double steel rollers, thicker forks, wider pump assemblies. Uses the AIMBJ150 model (\u03a640\/22 MPa) or AIMBA200 (\u03a645\/20 MPa). The higher pressure rating provides the additional force margin needed for loads exceeding 2,500 kg, while the larger rod diameter (\u03a635\u2013\u03a640) handles the increased column loading from heavier pallets.<\/p>\n<\/div>\n

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Semi-Electric and Low-Profile Trucks<\/h3>\n

Compact pallet trucks with electric drive but manual hydraulic lift, and ultra-low-profile trucks designed to enter pallets with only 51 mm ground clearance. The EPT18H model (\u03a640 bore, 120 mm stroke, 233 mm installation distance, 3.6 kg) fits the restricted frame space of these compact machines. Its 25 MPa rating compensates for the smaller bore area, delivering equivalent lift force in a 45% lighter and 34% shorter package than the standard models.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Cart Lift Cylinder \u2014 Frequently Asked Questions<\/h2>\n
\n
\n

The pallet truck forks sink slowly when loaded \u2014 is the cylinder leaking?<\/h3>\n

Possibly, but check the simpler causes first. Slow fork descent under load is caused by three things, in order of likelihood: (1) contamination on the steel ball check valve seat \u2014 clean the ball and seat; (2) worn or damaged U-ring allowing oil to bypass past the rod \u2014 replace the seal kit; (3) a cracked or scored cylinder housing bore \u2014 replace the cylinder. Start with the check valve cleaning \u2014 it resolves the problem in approximately 70% of cases and takes less than 15 minutes.<\/p>\n<\/div>\n

\n

The forks do not rise at all when I pump the handle \u2014 what should I check?<\/h3>\n

First, verify the release lever is in the fully closed position \u2014 if the needle valve is even slightly open, all pump output flows directly back to the reservoir without entering the cylinder. Second, check the oil level in the pump reservoir \u2014 if the oil level is below the pump intake, the pump draws air instead of oil (the handle feels light and spongy with no resistance). Third, check for a disconnected or leaking hydraulic line between the pump and the cylinder. The cylinder itself rarely causes a total no-lift condition unless the bore is physically cracked.<\/p>\n<\/div>\n

\n

Can I replace a \u03a66 push-in port cylinder with an M12\u00d71.5 threaded port cylinder?<\/h3>\n

Only if you also change the hydraulic line from nylon tube to a threaded steel line and add the appropriate fitting. The \u03a66 push-in port is designed for 6 mm OD nylon tube that pushes in and locks with a collet \u2014 it is not threaded. The M12\u00d71.5 port requires a threaded fitting with a bonded seal. The two port types are not interchangeable without modifying the hydraulic line. If your pallet truck uses nylon tubing, order the \u03a66 push-in port model; if it uses steel lines, order the M12\u00d71.5 model.<\/p>\n<\/div>\n

\n

What hydraulic oil should I use in a hand pallet truck?<\/h3>\n

ISO VG 22 or ISO VG 32 hydraulic oil, depending on ambient temperature. VG 22 is preferred for cold environments (below 10\u00b0C) because its lower viscosity allows the manual pump to draw oil more easily. VG 32 is preferred for warm environments (above 25\u00b0C) because its higher viscosity provides better sealing and reduced internal leakage at elevated temperatures. Never use engine oil, transmission fluid, or brake fluid \u2014 these are chemically incompatible with the NBR and polyurethane seals in the hydraulic cylinder<\/a> and will cause rapid seal degradation. Typical oil capacity is 200\u2013350 ml for the entire pallet truck system.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Explore the Full Forklift Cylinder Range<\/h2>\n
\n
\n

\"Forklift<\/p>\n

\n

Forklift Lift Cylinders<\/h3>\n

Powered lift cylinders for counterbalance forklifts. Main lift (5 models) and short lift (5 models) for 1.5\u20135 tonne class.<\/p>\n<\/div>\n<\/div>\n

\n

\"Forklift<\/p>\n

\n

Tilt, Steering & Positioner<\/h3>\n

Tilt (7 models), steering (3 models), and fork distance adjustment (5 models) for full mast system replacement.<\/p>\n<\/div>\n<\/div>\n

\n

\"Aerial<\/p>\n

\n

Aerial Work Vehicle Cylinders \u2192<\/a><\/h3>\n

Boom, scissor, and platform cylinders for elevated access equipment.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

The lift cylinder for cart is the compact hydraulic heart of every hand pallet truck. When the operator pumps the handle, this single-acting cylinder extends 120\u2013155 mm \u2014 lifting a loaded pallet 100\u2013200 mm off the ground so the wheels can roll freely. At only 8 internal components and 3.6\u20136.5 kg total weight, it is the simplest and lightest cylinder in the Korea Ever-Power forklift hydraulic range, yet it operates at the highest working pressure \u2014 up to 25 MPa \u2014 because the small bore area must generate enough force to lift 2,000\u20133,000 kg through a foot-pump that delivers only 2\u20135 cc per stroke. Four models with \u03a640 and \u03a645 bores cover standard, long-fork, and low-profile hand pallet trucks.<\/div>","protected":false},"featured_media":2217,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[850],"product_tag":[],"class_list":["post-2215","product","type-product","status-publish","has-post-thumbnail","product_cat-forklift-hydraulic-cylinders","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product\/2215","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=2215"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/media\/2217"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/media?parent=2215"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product_brand?post=2215"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product_cat?post=2215"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/zh\/wp-json\/wp\/v2\/product_tag?post=2215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}