{"id":1557,"date":"2026-04-13T08:32:44","date_gmt":"2026-04-13T08:32:44","guid":{"rendered":"https:\/\/planetarygeardrive.top\/?p=1557"},"modified":"2026-04-13T08:41:50","modified_gmt":"2026-04-13T08:41:50","slug":"scissor-lift-gearbox-selection-guide","status":"publish","type":"post","link":"https:\/\/planetarygeardrive.top\/es\/application\/scissor-lift-gearbox-selection-guide\/","title":{"rendered":"How to select a scissor lift planetary gearbox? JLG, Genie, and Skyjack explained"},"content":{"rendered":"
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Equipment Application \u00b7 Access & Lifting<\/p>\n

Scissor Lift Planetary Gearbox: Self-Propelled AWP Drive Specification, Failure Modes, and Replacement Guide<\/h2>\n

The scissor lift planetary gearbox<\/strong> at each driven wheel of a self-propelled aerial work platform (AWP) must meet a unique combination of conflicting demands: compact enough to fit inside a standard wheel hub assembly (often \u2264200mm outer diameter), torque-dense enough to move 2,000\u20135,000 kg of machine plus rated load at gradeability up to 35%, and sealed to survive year-round outdoor use including industrial pressure washing. This guide expands on specification, common failure modes, a step-by-step replacement procedure, and how to integrate complementary drivetrain components for the most widely deployed electric scissor lift platforms across JLG, Genie, Skyjack, and Haulotte.<\/p>\n<\/div>\n

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800\u20134,000 Nm<\/div>\n
Wheel torque range (per hub)<\/div>\n<\/div>\n
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IP65\/IP66<\/div>\n
Minimum seal rating (rental fleet)<\/div>\n<\/div>\n
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2\u20133 stage<\/div>\n
Planetary stages (ratio 25:1 to 65:1)<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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AWP Drive Requirements \u2014 Four Factors That Separate Scissor Lift Gearboxes from Standard Wheel Drives<\/h2>\n
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\u2460 Compact Wheel Hub Envelope<\/div>\n

The self-propelled lift wheel drive gearbox<\/strong> must fit within the wheel hub assembly \u2014 typically housing OD of 120\u2013200 mm and axial length of 90\u2013150 mm. This severely constrains design compared to standard industrial drives. The solution is a 2\u20133 stage planetary arrangement with higher ratio per stage (up to 10:1 per stage) and using the wheel hub structure as the gearbox outer housing rather than a separate casting. Most AWP gearboxes use 5\u20136 planet gears per stage to spread load within the compact envelope.<\/p>\n<\/div>\n

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\u2461 Electric Motor Low-Speed High-Torque Profile<\/div>\n

Modern electric scissor lifts use brushless DC hub motors or separate BLDC motors driving the planetary gearbox. The motor’s speed-torque curve at low speed (2\u20135 km\/h travel speed) defines the input condition \u2014 the gearbox ratio must step this down to wheel RPM while multiplying torque to produce gradeability (25\u201335% grade at rated load). For a typical 3,000 kg machine, wheel torque requirement is 1,800\u20132,500 Nm per hub, achieved with a 2-stage planetary of ratio \u224840:1.<\/p>\n<\/div>\n

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\u2462 Brake Function Integration<\/div>\n

The aerial work platform drive gearbox<\/strong> must integrate or directly accept a fail-safe parking brake. Scissor lifts are required by most rental and jobsite safety regulations to park securely on any slope within rated gradeability \u2014 the brake must hold the fully loaded platform without motor power. Most wheel drive gearboxes use a spring-applied, electrically-released multi-disc brake mounted at the motor interface end, with static holding torque of 1.5\u00d7 the wheel’s dynamic torque rating.<\/p>\n<\/div>\n

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\u2463 Pressure Wash Resistance (Rental Fleet Reality)<\/div>\n

Rental depots clean machines with 50\u201380 bar pressure washers directed at wheel hubs. IP55 seals fail within 12\u201318 months \u2014 IP65 (or IP66 with shaft labyrinth) is the minimum acceptable specification. Our gearboxes use double-lipped nitrile or FKM rotary shaft seals with a stainless steel excluder to prevent jet wash ingress, and breather valves with one-way membrane to equalize pressure without sucking water.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Common Scissor Lift Models \u2014 Gearbox Specification Reference & Cross-Brand Comparison<\/h2>\n

The four dominant scissor lift brands in North American and Australian rental markets \u2014 JLG, Genie, Skyjack, and Haulotte \u2014 all use compact wheel hub planetary drives on their electric self-propelled platforms. The JLG scissor lift gearbox<\/strong> on the 2646ES and 3246ES (most widely rented models) uses a 2-stage right-angle planetary in the 1,500\u20132,200 Nm range per wheel hub, with a 4-bolt motor flange pattern (102mm pilot diameter) accepting the platform’s BLDC motor directly. The Genie scissor lift drive reducer<\/strong> on GS-2632 and GS-3246 uses a similar design but with a 5-bolt flange and slightly larger housing (180mm OD vs JLG’s 165mm). Genie rates their 32-foot models at 30% gradeability vs JLG’s 25% for comparable machine weights \u2014 reflected in a higher-torque gearbox (2,200\u20132,800 Nm).<\/p>\n

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Brand \/ Model<\/th>\nPlatform height<\/th>\nWheel torque (Nm)<\/th>\nPlanetary stages<\/th>\nBrake type<\/th>\n<\/tr>\n<\/thead>\n
JLG 2646ES<\/strong><\/td>\n26 ft<\/td>\n1,800 Nm<\/td>\n2-stage<\/td>\nSpring-applied, 24V DC release<\/td>\n<\/tr>\n
JLG 3246ES<\/strong><\/td>\n32 ft<\/td>\n2,200 Nm<\/td>\n2-stage<\/td>\nSpring-applied, 24V DC release<\/td>\n<\/tr>\n
Genie GS-3246<\/strong><\/td>\n32 ft<\/td>\n2,600 Nm<\/td>\n3-stage<\/td>\nSpring-applied, 24V (negative brake)<\/td>\n<\/tr>\n
Skyjack SJ3215<\/strong><\/td>\n19 ft<\/td>\n1,200 Nm<\/td>\n2-stage<\/td>\nMechanical drum on motor<\/td>\n<\/tr>\n
Haulotte Compact 10<\/strong><\/td>\n32 ft<\/td>\n2,400 Nm<\/td>\n2-stage<\/td>\nSpring-applied, 24V DC release<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

For all electric scissor lift and AWP wheel drive planetary<\/strong> replacement requirements, identify the correct replacement using three items: machine model and serial number, motor flange type (from motor housing), and existing gearbox nameplate. Providing all three confirms the exact dimensional spec \u2014 including wheel hub thread interface (M12x1.5, M14x1.5, or imperial 5\/8″-18) \u2014 before ordering. Our right angle planetary gearbox catalogue<\/a> covers torque and envelope requirements for most major scissor lift brands. The 300R right angle planetary gearbox<\/a> covers 1,000\u20138,000 Nm range with compact housing dimensions required for scissor lift wheel hub installations and IP65 sealing as standard, plus an optional integrated negative brake interface.<\/p>\n<\/div>\n

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Scissor Lift Wheel Drive Gearbox Maintenance \u2014 What Rental Fleet Managers Need to Know<\/h2>\n

Scissor lift wheel drive gearboxes in rental fleet service accumulate operating hours differently from construction equipment \u2014 a rental scissor lift may be used by 30\u201350 different operators across 200 jobsites in a year, with no consistency of maintenance practice or operating conditions. The most common failure mode is not bearing fatigue but seal failure from pressure washing during fleet cleaning. Standard rental depot cleaning procedures use 50\u201380 bar pressure washers directed at all machine surfaces including wheel hubs. IP55 seals \u2014 adequate for rain and splash exposure \u2014 fail within 12\u201318 months of regular pressure wash cleaning. IP65 is the minimum acceptable specification for rental fleet scissor lift drives.<\/strong><\/p>\n

Oil change intervals for scissor lift wheel drive gearboxes in rental fleet service should be set at 500 operating hours (not the 1,000-hour interval appropriate for single-operator construction machines), because varied duty cycle and pressure washing exposure accelerate oil contamination. At each 500-hour service, drain and inspect the oil \u2014 milky discolouration confirms seal weep and water ingress; metallic chips confirm bearing wear. Both conditions require immediate gearbox replacement rather than extended service. Use ISO VG 220 synthetic oil (PAO-based) for extended temperature range (-30\u00b0C to +60\u00b0C).<\/p>\n

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\ud83d\udd27 Quick diagnostic guide for AWP gearbox failure:<\/p>\n