Knuckle Boom Truck Mounted Cranes

SQ4ZA34 Ton Knuckle Boom Truck Mounted Crane SQ4ZA3

SQ: Truck mounted crane
4: 4 t capacity class
Z: Knuckle boom
A3: 1 main boom + 2 hydraulic booms

Max Lifting Capacity: 4000kg
Max Lifting Moment: 8.4t·m
Recommended Power: 14kW
Hydraulic System Flow: 25L/min

Download PDF14.4 MB

Or message us +86 158 5249 9415 info@boblift.com

12-month warranty
Order from 1 unit
Shipping & warranty

Confirm your configuration and current availability with our team.

4 Ton Knuckle Boom Truck Mounted Crane SQ4ZA3

Engineering data

SQ4ZA3 Specifications

Lifting

Max Lifting Capacity: 4000kg
Max Lifting Moment: 8.4t·m
Rotation Angle: 400°

Hydraulics and power

Recommended Power: 14kW
Hydraulic System Flow: 25L/min
Hydraulic System Pressure: 26MPa
Oil Tank Capacity: 60 L

Machine

Self Weight: 1350kg
Installation Space: 850mm

Reach and outriggers

Max. radius: 7.7m
Max. height: ≈ 9.5 m
Max. boom angle: 75°
Outrigger span: 2250–3513 mm

Figures from the BOB-LIFT brochure for this range. Confirm the final specification with our team before ordering.

Compare all Knuckle Boom Truck Mounted Cranes

Dimensions and load chart

Select the drawing to view it full size.

How much it lifts at each reach The further the hook is from the crane, the less it can lift: 4,000 kg at 2.1 m, 850 kg at 7.7 m.

Lifts (kg)	4,000	1,750	1,250	850
Reach (m)	2.1	4.35	5.9	7.7

Reach is measured from the slewing centre to the hook. Figures from the drawing above.

Product details · SQ4ZA3

4 Ton Knuckle Boom Truck Mounted Crane SQ4ZA3

Optional attachments

Hydraulic gripper opened and closed by its own cylinder to grab and release loads.
Clamshell bucket for loading, unloading and light digging of waste, chippings and soil.
Orange peel grab for scrap and bulk material.
Timber grapple for logs and timber.
Auger for tree-planting holes, utility poles, foundation piles and soil sampling.

Certification

The SQ4Z series holds a CE certificate of conformity under the EU Machinery Directive 2006/42/EC.

Capacity class

4 t

Max lifting moment 8.4 t·m
Knuckle boom sections

3

1 main boom + 2 hydraulic booms
Hydraulic flow

25 L/min

26 MPa · 14 kW recommended

The 4 t models compared

Model	Boom sections	Max lifting moment	Self weight
SQ4ZA3 This model	3	8.4 t·m	1350 kg
SQ4ZA4	4	8.4 t·m	1460 kg

Choosing the right model

Need more than 4 t? The next class up is the BLZ90K5 at 4.6 t. For lighter loads, the SQ3.2ZA3 at 3.2 t is the class below.

Before ordering, check that the truck's power take-off can deliver 25 L/min at 26 MPa. We recommend 14 kW of hydraulic power. Its self weight of 1350 kg adds to the load on the truck, so allow for it in the payload.

Knuckle Boom Truck Mounted Crane

Product technical advantages

High-strength welded structure

Welded high-strength plate with a hexagonal boom section.
Box-type outriggers

Box outriggers above 6.3 t protect the cylinders.
Optional attachments

Winch, auger, basket or grapple on request.
Operation modes

Manual levers, aerial seat or wireless remote.
Dual four-bar linkage

Reverse-angle reach for tight jobs.

Dedicated torque limiter Load moment limiter on every crane, safety certified.
Large-span outriggers Wide fixed outriggers, manual flip optional.

Manufacturing & delivery

From our workshop to your port

01

Assembly

Slewing base, column and booms are assembled by hand in our Xuzhou workshop.
02

Load test

The crane lifts test weights through its working range before release.
03

Final check

Finished cranes are inspected and lined up for dispatch.
04

Packing

Wrapped in film and strapped to protect paint and hydraulics in transit.
05

Container loading

Loaded into containers at the factory and shipped to your port.

Shipping & warranty

Shipping, warranty and documents

How the SQ4ZA3 reaches you, and what happens after it arrives.

Shipping

Lead time and container loading are confirmed with your quotation.

Warranty and parts

12 months

Send the model, serial number and a photo or video of the issue; our team guides the repair and ships the parts.

Order from 1 unit

Documents

Truck Mounted Cranes Brochure

PDF · 22 pages · 14.4 MB

Download PDF
Dimensions and load chart
SQ4ZA3 Specifications

Customer Feedback

Photos and videos from customers

Australia SQ4ZA3 · 6 photos

Malaysia SQ4ZA3 · 1 photo

FAQ

Questions about the SQ4ZA3

About the SQ4ZA3

01 How does the SQ4ZA3 differ from the SQ4ZA4?

SQ4ZA3: 3 boom sections, 8.4 t·m, 1350 kg. SQ4ZA4: 4 boom sections, 8.4 t·m, 1460 kg. They share a capacity class and differ in the number of boom sections.

02 What hydraulic supply does the SQ4ZA3 need?

25 L/min at 26 MPa. We recommend 14 kW of hydraulic power. Send us the truck's power take-off data and we confirm the match when we quote.

03 What warranty and minimum order apply to the SQ4ZA3?

The SQ4ZA3 carries a 12-month warranty, and you can order from 1 unit.

Not answered here?

Send us your question and our team replies with answers for your site.

+86 158 5249 9415