Boom Positioning & Load Alignmen

Rotate the crane to align the boom over the load. Adjust boom height and telescopic extension to position the hook correctly. Safety Tip: Follow the load chart and ensure lifting weight is within allowed limits for current boom radius and angle.

Crane Extension Preparation

Sit at operator seat and slowly operate boom angle handles to extend the main boom and telescopic sections. Move one handle at a time. Safety Tip: Never operate multiple boom handles simultaneously. Keep boom path clear of personnel.

Unlock outriggers and extend main and auxiliary outriggers fully. Place support pads under each outrigger on soft ground. Safety Tip: Ensure the truck is level. Incomplete extension may lead to tipping hazards.

Engaging Power Take-Off (PTO)

Ensure truck gear is in neutral and PTO switch is off. Start engine and wait for safe air pressure levels. Engage PTO slowly to drive the hydraulic crane system. Safety Tip: Confirm all control levers are neutral before operation. Improper PTO engagement can damage hydraulic components.

Pre-Operation Site Check

Park the truck on firm, level ground. Engage the parking brake. Inspect the surrounding area for obstacles, overhead lines, or unstable surfaces. Confirm the load is within crane rated capacity and lifting height limits. Safety Tip: Never operate on soft or sloped surfaces. Maintain at least 10 meters distance from high-voltage lines.

You are here: Home » Product » Knuckle Boom Truck Mounted Crane » (SQZ400A.4) 18 Ton Knuckle Boom Truck Mounted Crane

(SQZ400A.4) 18 Ton Knuckle Boom Truck Mounted Crane

Model: SQZ400A.4

The SQZ400A.4 is an 18-ton hydraulic knuckle boom truck mounted crane, also referred to as a heavy-duty truck crane, articulated loader crane, industrial lifting crane, hydraulic foldable crane, or mega lifting solution. It features a maximum lifting capacity of 18,000 kg, a lifting moment of 40 t.m, and a 360° full slewing rotation, designed for heavy construction, industrial installation, port operations, and energy projects. Its durable build, high-performance hydraulic system, and precise lifting make it ideal for global infrastructure and industrial applications.

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Product Description

Product Description Safety Related Products

Product Description

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Product Advantage

High Lifting Strength
Capable of lifting 18,000 kg with a 40 t.m lifting moment, the SQZ400A.4 can manage oversized industrial components, steel, and concrete with ease.

Robust Hydraulic System
With 40 kW recommended power, 63 L/min flow, and 30 MPa pressure, the crane ensures fast, precise, and smooth operations under heavy-duty workloads.

360° Operational Flexibility
The full slewing design allows operators to access all sides of the truck, eliminating frequent repositioning and improving efficiency.

Reinforced Boom & Durable Structure
Enhanced steel sections and welding processes offer superior fatigue resistance, longevity, and safety, outperforming typical supplier cranes.

ISO-Certified Quality
Produced under ISO9001 and weaponry-grade quality control, guaranteeing consistency, reliability, and operational safety.

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Technical Parameters

Crane main technical parameters

Maximun lifting weight	18000Kg	Oil tank capacity	250L
Max lifting movement	40 t.m	Slewing angle	360°
Recommended power	40KW	Stabilizer spread	7200±5mm
Max operating pressure	30MPa	Hydraulic crane weight	5950kg
Recommended hydraulic flow	63 L/min	Installation space	1700mm

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Product Uses

Mega Construction & Bridges
Lifting steel girders, precast bridge elements, and heavy concrete modules.

Industrial Plant & Machinery Installation
Positioning large industrial equipment, machinery, and production line components accurately.

Ports & Logistic Centers
Moving heavy containers, cargo, and industrial materials safely and efficiently.

Renewable Energy Projects
Installing turbines, transformer units, and heavy utility equipment.

Urban Municipal Projects
Road construction, bridge maintenance, and urban building material lifting.

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FAQ

1. Is SQZ400A.4 stronger than standard supplier cranes?

A: Yes. It features reinforced boom sections, thicker steel, and advanced welding for higher fatigue resistance and safer heavy lifting.

2. Can it operate continuously for long shifts?

A: Yes. The high-capacity hydraulic system maintains stable performance for extended heavy-duty operations.

3. Which truck chassis are suitable?

A: Medium to heavy-duty trucks meeting structural, hydraulic, and stability requirements. Tengchang provides detailed compatibility guidance.

4. How reliable is Tengchang’s service support?

A: Global after-sales, spare parts, maintenance support, and technical assistance are available to ensure continuous operation.

5. Why is the crane safer and more precise than competitor models?

A: Reinforced boom design, vibration-resistant construction, and optimized hydraulics ensure stability, precise handling, and reduced wear over time.

Truck-Mounted Crane Safety & Operation Guide

Ensuring operator and crew Safety with proper handling.

Boom Positioning & Load Alignmen

Rotate the crane to align the boom over the load.

Adjust boom height and telescopic extension to position the hook correctly.

Safety Tip: Follow the load chart and ensure lifting weight is within allowed limits for current boom radius and angle.
Crane Extension Preparation

Sit at operator seat and slowly operate boom angle handles to extend the main boom and telescopic sections.

Move one handle at a time.

Safety Tip: Never operate multiple boom handles simultaneously. Keep boom path clear of personnel.
Outrigger Setup

Unlock outriggers and extend main and auxiliary outriggers fully.

Place support pads under each outrigger on soft ground.

Safety Tip: Ensure the truck is level. Incomplete extension may lead to tipping hazards.
Engaging Power Take-Off (PTO)

Ensure truck gear is in neutral and PTO switch is off.

Start engine and wait for safe air pressure levels.

Engage PTO slowly to drive the hydraulic crane system.

Safety Tip: Confirm all control levers are neutral before operation. Improper PTO engagement can damage hydraulic components.
Pre-Operation Site Check

Park the truck on firm, level ground. Engage the parking brake.

Inspect the surrounding area for obstacles, overhead lines, or unstable surfaces.

Confirm the load is within crane rated capacity and lifting height limits.

Safety Tip: Never operate on soft or sloped surfaces. Maintain at least 10 meters distance from high-voltage lines.

Post-Operation Maintenance

Lubricate pivot points, boom slides, and hydraulic cylinder pins

Check hydraulic oil levels, inspect hoses, and tighten bolts

Safety Tip: Only trained personnel should perform hydraulic maintenance. Replace worn parts immediately.
Crane Retraction & Stowage

Retract telescopic sections and fold boom sequentially.

Rotate crane to stowed position and fully retract outriggers

Safety Tip: Follow reverse order of extension to protect hydraulic cylinders and boom sections.
Lowering & Load Placement

Lower the load carefully to the designated position.

Detach slings and cables only when load is stable and personnel are clear.

Safety Tip: Never leave a suspended load unattended. Avoid sudden lowering.
Rotating with Load

Rotate the crane slowly to move the load

Monitor outrigger stability and crane tipping indicators.

Safety Tip: Do not extend the working radius while rotating a loaded boom. Keep movements smooth.
Lifting Operation

Lift the load slowly and steadily. Avoid sudden movements or swinging.

Monitor vehicle stability and outrigger pressure during the lift.

Safety Tip: Never exceed rated capacity. Avoid lifting loads over personnel.