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Case Study: Optimized Demolition Boom for CAT336 with 2.5-Ton Shear

2025-06-20

Project Background:

A South American contractor needed to replace their underperforming 22m CAT336 demolition boom that struggled with:
⚠️ Excessive strain when using 1.67-ton shear (vertical positioning)
⚠️ Limited lifting capacity for heavier attachments
⚠️ Premature wear on standard Q355B structure

latest company case about Case Study: Optimized Demolition Boom for CAT336 with 2.5-Ton Shear 0

latest company case about Case Study: Optimized Demolition Boom for CAT336 with 2.5-Ton Shear 1

Engineering Solution

Redesigned 19m High-Reach Demolition Boom

Parameter	Original Design	Upgraded Version
Length	22m	19m
Material	Full Q355B	Q690D (upper/lower) + Q355B (side plates)
Arm Weight	4,445kg (boom)	Optimized distribution
Cylinders	Standard	Reinforced Ø220mm
Max Attachment	1.67t	2.5t (rotation shear/grapple)

Key Improvements:

✔ 19% shorter length for better load management
✔ Q690D steel in critical stress areas (yield strength ↑40%)
✔ Custom hydraulic circuits for smoother operation

latest company case about Case Study: Optimized Demolition Boom for CAT336 with 2.5-Ton Shear 2

Technical Breakdown

Structural Enhancements

Boom/Stick:
- Upper/Lower Plates: 25mm Q690D
- Side Walls: 20mm Q355B
Pivot Points:
- 80mm diameter pins (from 65mm)
- Bronze bushings with grease channels

Hydraulic System

New Cylinders:
- Bore: 220mm (original 200mm)
- Pressure rating: 350bar
Revised Valve Settings:
- 15% slower extension speed
- Pressure relief at 280bar

Performance Gain:
▸ 2.5-ton shear operation now stable at full extension
▸ Expected service life extended by 60%

Why This Matters for Your Project

Lessons Learned

Shear Weight vs. Reach:
- Every 1-ton attachment weight ↓ recommended length by 3m
Material Selection:
- Q690D adds 15% cost but ↑ lifespan 2X in demolition
Cylinder Sizing Rule:
- Minimum 220mm bore for 2.5t+ attachments

Pro Tip: Request our free load calculator to simulate your configuration

Expert Support:

Kaiping Zhonghe Machinery Manufacturing Co.,LTD.
Whatsapp: wa.me/+8618127591702

News

Cases

Case Study: Optimized Demolition Boom for CAT336 with 2.5-Ton Shear

Engineering Solution

Redesigned 19m High-Reach Demolition Boom

Technical Breakdown

Structural Enhancements

Hydraulic System

Why This Matters for Your Project

Lessons Learned

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