Product Description
Construction Machinery Caterpillar Excavator Spare Parts Long Reach Boom and Arm
The crawler excavator long reach boom and arm is a front working attachment built for Caterpillar excavators when the standard boom cannot reach the working face. It is mainly supplied in two types: two-section type and three-section type.
The two-section type long reach boom and arm is mainly used for construction transportation of sand and concrete, slope repairing of expressways, dredging of river courses, and earthwork excavation of building foundations, river courses and deep ditches.
The three-section type adds one more boom section. It is selected when the job needs a longer horizontal reach or a greater digging depth, such as wide river dredging, high or long expressway slopes, and deep foundation or ditch work. Length, pin size and linkage are matched to the base machine and the site drawing.
Main structure parts include the boom, arm, linkage, pins and bushings, hydraulic pipeline layout and reinforced hinge seats. The attachment is made as an aftermarket spare part for crawler excavators and can be produced to the customer’s model and working range.
Caterpillar Excavator Long Reach Boom and Arm
Mechanical Properties
The figures below are typical reference values of the structural steel grades commonly used for long reach booms and arms. Final plate grade and welding procedure are confirmed on the order drawing.
| Item | Property | Typical Reference |
|---|---|---|
| Q345B Plate | Yield Strength | ≥ 345 MPa |
| Tensile Strength | 470–630 MPa | |
| Elongation | ≥ 20% | |
| Q690 High-Strength Plate | Yield Strength | ≥ 690 MPa |
| Tensile Strength | 770–940 MPa | |
| Elongation | ≥ 14% | |
| Welded Boom and Arm | Main Seams | CO2 / MIG welding, full penetration on main joints |
| Structure | Box-section boom and arm with reinforced hinge plates |
Long Reach Boom and Arm Selection List
Typical selection reference for Caterpillar crawler excavators. Final length, pin size and weight are confirmed by machine model and working drawing.
| Item | Property | Typical Reference |
|---|---|---|
| Caterpillar | Excavator | E320, E320D, E320E, E323, E330, E330D, E336, E345DL, E349DL, E374, E395, E305.5, E308, E312, E315 |
| Bulldozer | D3, D5H, D5M, D5N, D6, D6H, D6R, D6T, D6M, D6N, D7, D7G, D7H, D7R, D8, D8N, D8R, D8T, D9, D9R, D9N, D9T, D10N, D10T, D11N, D11T | |
| Motor Grader | 120, 140, 160, 18, 24 | |
| Komatsu | Excavator | PC55, PC70, PC130, PC200, PC220, PC240, PC300, PC350, PC400, PC450, PC650, PC800, PC1250 |
| Bulldozer | D20, D31, D37, D51, D61, D65EX-12, D65PX-15, D85EX-15EO, D85ESS-2A, D155AX-6, D275, D375, D475, D575 | |
| Wheel Loader | WA100, WA150, WA200, WA250, WA320, WA380, WA430, WA470, WA500, WA600, WA800, WA900 | |
| Motor Grader | GD405, GD555, GD655, GD675, GD755, GD825 | |
| Hitachi | Excavator | ZX55, ZX70, ZX120, ZX130, ZX200, ZX210, ZX240, ZX250, ZX330, ZX350, ZX470, ZX670, ZX870, ZX1200, EX200, EX300, EX400 |
| JCB | Backhoe Loader | 1CX, 2CX, 3CX, 4CX, 5CX |
| Excavator | JS130, JS145, JS160, JS200, JS220, JS235, JS300, JS330, JS370, JS460 | |
| Kobelco | Excavator | SK55, SK75, SK130, SK140, SK170, SK200, SK210, SK210LC-8, SK220, SK250, SK260, SK300, SK330, SK350, SK480, SK500, SK850 |
| Hyundai | Excavator | R55, R80, R110, R140, R160, R180, R210, R220, R250, R290, R300, R330, R360, R380, R430, R480, R520, R800 |
| Shantui | Bulldozer | SD08, SD13, SD16, SD22, SD23, SD32, SD42, SD52, SD90 |
| Excavator | SE60, SE75, SE135, SE150, SE210, SE215, SE220, SE240, SE260, SE335, SE370, SE470, SE500 | |
| Doosan | Excavator | DX55, DX60, DX80, DX140, DX150, DX170, DX200, DX225, DX235, DX255, DX300, DX340, DX350, DX380, DX420, DX480, DX520, DX530, DX700, DX800 |
| New Holland | Excavator | E18, E26, E33, E37, E55, E60, E75, E135, E145, E175, E215, E230, E260, E305, E335, E385, E485 |
| Daewoo | Excavator | DH55, DH60, DH80, DH130, DH150, DH170, DH200, DH220, DH225, DH258, DH280, DH300, DH320, DH360, DH370, DH420, DH500 |
Features
-
Two Structure Options
Two-section type and three-section type are available for different reach and digging depth. -
High-Strength Box Structure
Boom and arm are fabricated from high-strength structural steel plate for long-span earthwork. -
Reinforced Hinge Points
Pin seats, bushings and linkage plates are thickened at the main load points. -
Matched to the Base Machine
Mounting pins, pipeline position and bucket linkage can follow the Caterpillar excavator model. -
Custom Working Range
Length is made according to machine tonnage, drawings, samples and the required river, slope or ditch depth.
Application
- Construction transportation of sand and concrete, where the machine needs to load or place material beyond the standard digging radius.
- Slope repairing of expressways, including trimming, clearing and reshaping of long or high side slopes.
- Dredging of river courses, channels and silted waterways from the bank.
- Earthwork excavation of building foundations, river courses and deep ditches.
- Crawler excavator jobs that need a longer reach than the original boom and arm can provide.
River Dredging, Slope Repair and Deep Excavation
Product Parameters
| Name | Construction machinery Caterpillar excavator spare parts long reach boom and arm |
| Type | Two-section type; three-section type |
| Applicable Machine | Caterpillar crawler excavators, built to the required model |
| Material | Q345B or Q690 high-strength structural steel plate |
| Process | CNC cutting, box-section fabrication, CO2 / MIG welding, machining of pin holes |
| Surface | Shot blasting, primer and finish paint |
| Main Parts | Boom, arm, linkage, pins, bushings and pipeline brackets |
| Application | Sand and concrete handling, expressway slope repair, river dredging, foundation and deep ditch excavation |
| Customization | Length, pin size and linkage made to samples, designs and drawings |
| Package | Steel frame or export wooden packing according to boom length |
Why Choose us?
FAQ
What types of long reach boom and arm are available?
Crawler excavator long reach boom and arm mainly has two types: two-section type and three-section type. The structure is selected according to the required reach, digging depth and excavator model.
What is the two-section type mainly used for?
It is mainly used for construction transportation of sand and concrete, slope repairing of expressways, dredging of river courses, and earthwork excavation of building foundations, river courses and deep ditches.
When should a three-section type be selected?
The three-section type is used when the working face needs a longer horizontal reach or a greater depth, such as a wide river, a long expressway slope, or a deep foundation and ditch. The length is confirmed by the machine and the site.
Which machines can use this boom and arm?
It is made as a spare front attachment for Caterpillar crawler excavators. Please advise the exact model, original pin size and required working range so the mounting dimension can be matched.
Can the boom and arm be customized?
Yes. Length, linkage and pin dimensions can be produced according to the client’s samples, designs and drawings.
What material and process are used?
The boom and arm are fabricated from Q345B or Q690 high-strength steel plate by CNC cutting and CO2 / MIG welding. Pin holes are machined, and the surface is shot blasted and painted.
