Rough terrain / 4WD
Skyjack SJ51 AJ Articulating Boom Lift
Skyjack SJ51 AJ
51ft diesel articulating boom lift, 17.55m working height, 9.03m outreach, 227kg — the long-reach knuckle boom, 4WD with 45% gradeability.
Working height
17.55 m
Platform height
15.55 m
Power
Diesel
Width
2.29 m
Specification sheetDownload Specification sheet
Overview
About the Skyjack SJ51 AJ Articulating Boom Lift
The Skyjack SJ51 AJ is the long-reach diesel articulating boom in the fleet: 17.55m working height, 15.55m platform height, 9.03m horizontal reach (9.68m working reach) and 7.45m up-and-over height. Axle-based 4WD with 0.20m axle oscillation and 45% gradeability on 12×16.5 grip-lug foam-filled tyres. The 1.83 x 0.76m platform rotates 170 degrees; the 1.52m jib works +70 to -75 degrees; turret rotation is 355 degrees non-continuous. Stage V Deutz D2.2L diesel, 18.5kW (24.8hp). 7,300kg.
Where it works
Best-fit jobs and sites
- High external access where outreach matters more than height, facade and cladding work, plant and steelwork over obstructions.
Good to confirm: Diesel engine — outdoor use only. 7,300kg; check ground bearing and access. Local floor load with rated load 917 kPa. An online listing cannot replace a site assessment, so tell us the job and we will confirm suitability.
Specifications
Full specifications
Grouped for quick scanning — a row appears once its figure is verified for this machine. The manufacturer spec sheet always takes precedence.
Reach & platform2 specs
- Working height
- 17.55 m
- Platform height
- 15.55 m
Capacity1 spec
- Platform capacity
- 227
Dimensions2 specs
- Overall width
- 2.29 m
- Turning radius
- 5.15
Performance4 specs
- Gradeability
- 45
- Terrain type
- Rough terrain / 4WD
- Indoor use
- No
- Outdoor use
- Yes
Power & drive3 specs
- Power source
- Diesel
- Drive type
- 4WD
- Tyre type
- Foam-filled
Machine & transport5 specs
- Manufacturer
- Skyjack
- Model
- SJ51 AJ
- Machine weight
- 7300
- Customer pickup
- Delivery only
- Delivery
- Quoted by suburb & access
Dimensions at a glance
The numbers that decide access
- Machine width
- 2.29 m: large machine, so plan vehicle-width access
Drawn to scale from this machine's stored specifications. The manufacturer spec sheet (below) governs.
Delivery, access and running
Delivery is quoted by suburb, site access and transport requirements. Tell us the tightest access width on site if the machine must pass through gates, doorways or between structures.
Licence and competency: Boom-type EWP. A WP-class high-risk work licence is required in NSW where the boom length is 11m or more; harness with lanyard mandatory in the basket.
Hire period: Hire runs from delivery or pickup until off-hire is confirmed. Rates are quoted for your dates, suburb and machine together; see our hire terms for responsibilities during the hire.
Pre-start checks, every day
Every Equip Hire machine is function-tested before delivery, and every operator still checks the machine before each shift. This is the baseline we use; the machine's own logbook and check sheet govern.
Walk around
- Tyres / tracks, wheels and structure: damage, cracks, leaks
- Scissor stack / boom, pins and hoses: no visible damage or hydraulic leaks
- Decals, capacity plate and rails in place; gates close properly
- Work area: overhead power lines, holes, slopes, other traffic
Power on
- Fuel level, engine oil and coolant
- Ground and platform controls both operate correctly
- Emergency stop and horn work from both stations
Function test
- Raise, lower and drive at low height before working
- Emergency lowering: know where it is and that it works
- Tilt / overload alarms not showing faults
- Harness on, lanyard to the rated anchor point: mandatory in the basket
Any fault: tag it out and call us on 0472 721 234. Do not operate a machine with a known fault. Based on manufacturer pre-start requirements and SafeWork NSW guidance.
Before it arrives
- Measure the route, not the door. Every gate, corridor and lift on the way to the work area: handles, hinges, bollards and stored materials all eat clearance.
- Walk the ground. Compacted and trafficable beats "looks firm", so mark soft spots, trenches and services before the machine tracks over them.
- Clear the work zone. Overhead services, sprinkler heads and light fittings at working height; exclusion for people below.
- Delivery space. Room for the truck to stop and unload safely. Tell us about docks, driveways and height limits when you book.
Mistakes we see weekly
- Booking on ceiling height instead of the actual task height. Measure to the work, then add nothing "just in case".
- Quoting the nominal door size instead of the clear opening. An 820 mm door leaf are not 820 mm once the door stop is counted.
- Treating a rough-terrain machine as an indoor unit. The tyres mark floors and the engine can't run enclosed.
- Leaving induction and permit requirements to delivery morning. Shopping centres and managed sites need paperwork before the truck arrives.
Documents
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Get a quote for the Skyjack SJ51 AJ Articulating Boom Lift
Tell us the job, the dates and the suburb. We will quote the machine and delivery together.