SQ3.2ZA3 Knuckle Boom Crane on a Dropside Truck in Russia

A white truck in a snowy yard, with its red crane unfolded high over the cab and the outrigger down: a photo from our customer in Russia shows a BOB-LIFT SQ3.2ZA3 knuckle boom crane mounted behind the cab of a dropside truck.

At a glance: SQ3.2ZA3 3.2 t knuckle boom crane · Russia · dropside truck · 1 customer photo.

What the photo shows

• The truck. A white truck carries a dropside body with grey side panels on a red frame, and a tall red headboard just behind the crane.
• The crane. The red crane is mounted between the cab and the body. The main boom stands upright, and the outer boom reaches forward over the cab with its black inner section extended and a red hook hanging from the tip.
• The supports. On the near side the outrigger is out, with its red foot down on the snow beside the cab. A second support leg stands down behind the rear wheels.
• The yard. Snow covers the yard, and other trucks, including white box trucks, are parked around it.

This is the customer's own photo. No load weights, dates or comments came with it.

SQ3.2ZA3 specifications

The SQ3.2ZA3 is a 3.2 t knuckle boom truck-mounted crane with a maximum lifting moment of 6.8 t·m and three boom sections (one main boom and two hydraulic booms). Reach and load figures are read from the technical department's load chart drawing; the hydraulic figures come from the BOB-LIFT brochure.

Lifting moment is the load times its distance from the slewing centre. That is why the rated load drops as the boom reaches out. For example, the SQ3.2ZA3 lifts 3,200 kg at 2.1 m but only 680 kg at 7.7 m. Outrigger span is the width between the outrigger feet when they are fully out. Set them on firm, level ground, such as concrete or compacted gravel, before each lift. For ground and outrigger rules, see the OSHA cranes and derricks standard.

At 4.35 m from the slewing centre the crane is rated for 1,350 kg; at full reach it is 680 kg.

The SQ3.2ZA3 product page has the full drawings. The same model works on a dropside light truck in our delivery record from Peru, and in our records from Kuwait and the United States.

Working a 3.2 t crane in snow

The photo was taken in winter, with snow on the ground. Cold weather does not change the load chart, but it changes the ground, the hydraulics and the loads. Four things to plan for:

1. Firm ground under the feet. Snow and ice can hide soft ground and make the outrigger feet slip. Clear the snow down to a firm surface, or set the feet on pads, before each lift.
2. Warm hydraulics. Cold oil flows slowly. Run the power take-off and pump without load for a few minutes, and try each crane function slowly, before you lift.
3. Snow and ice add weight. Clear snow from the load and ice from the hook and slings. Anything left on the load is weight the crane has to lift.
4. Heavy items near the front. Mounted behind the cab, the crane is strongest close in: 1,350 kg at 4.35 m and 910 kg at 5.9 m. Plan to land the heaviest items near the front of the body.

How we fit cranes to customer chassis is on the mounting and shipping page, and other capacities are in the knuckle boom truck mounted crane range.

Checking a truck for the SQ3.2ZA3

Before you order, check three things on your truck. They decide whether the SQ3.2ZA3 fits it.

• Payload. The crane weighs 1,330 kg. Take this off the truck's payload, then plan the body and the loads you carry with what is left.
• Hydraulic power. The crane needs 25 L/min at 25 MPa, about 14 kW. The power take-off and pump on your truck must give at least this.
• Outrigger room. The outriggers span 2,250 to 3,513 mm. Make sure the frame has room for them, and that your job sites do too.

Send us the make, model and wheelbase of your truck through the contact page, and our team will check the fit.

Record compiled by Achord Chan, Product Operations Director at BOB-LIFT, from the customer's photo, the technical department's drawing and the BOB-LIFT brochure.