Quick SummaryExpandable crawler tracks allow tracked spider lifts to adjust their undercarriage width for different jobsite conditions. A narrow track configuration helps equipment navigate restricted access routes, while a wider stance improves lateral stability during suitable ground travel. For example, the GLT GCT60 features adjustable track spacing from 2'11" (900 mm) to 3'11" (1,200 mm). This flexibility is particularly useful for contractors working in tree care, commercial maintenance, and industrial facilities. During elevated operation, the machine relies on properly deployed stabilizing outriggers rather than its crawler tracks for support. |
GLT GCT60 demonstrating its expandable crawler track system.
Contractors often need to move aerial work platforms through narrow gates, confined passageways, or landscaped areas before reaching the actual work location. At the same time, outdoor approaches may include gravel, uneven ground, or other conditions where a wider track stance is beneficial.
A fixed-width undercarriage requires a compromise between compact access and track spacing. Expandable crawler tracks give operators greater flexibility by allowing the crawler assemblies to retract or extend according to jobsite requirements.
Retractable tracks reduce the space occupied by the crawler undercarriage, helping tracked spider lifts approach restricted entrances and narrow routes.
This is particularly useful for work in commercial courtyards, historic properties, and residential landscapes where conventional boom lifts may be difficult to position.
However, access through a particular doorway depends on the machine's overall transport dimensions, not track spacing alone.
A wider crawler stance increases the distance between the left and right track assemblies, improving resistance to sideways tipping during suitable ground movement.
This can be useful when maneuvering across uneven outdoor surfaces, but track expansion does not automatically increase a machine's rated gradeability or eliminate ground-related hazards.
Operators must evaluate slope limits, traction, and ground conditions before traveling.
An expandable track system adjusts the spacing between the left and right crawler assemblies through a mechanism built into the undercarriage.
The system provides two primary configurations:
Retracted Tracks: Compact Access — In the retracted position, the tracks move inward to create a narrower undercarriage. This configuration helps the machine travel through restricted routes, including narrow gates, equipment passages, and confined access areas, provided the machine's overall dimensions meet the available clearance.
Expanded Tracks: Wider Ground-Travel Stance — When the tracks extend outward, the undercarriage gains a wider stance. The increased track spacing can improve lateral stability during ground travel, particularly when positioning equipment across suitable uneven terrain.
The GLT GCT60 tracked spider lift provides a practical example:
| Track Configuration | Track Spacing | Purpose |
|---|---|---|
| Retracted | 2'11" (900 mm) | Restricted access |
| Expanded | 3'11" (1,200 mm) | Wider ground-travel stance |
| Adjustment Range | 11.8" (300 mm) | Flexible positioning |
GLT LIFTS GCT60 expandable crawler tracks showing 900 mm and 1,200 mm track spacing.
Although both systems contribute to equipment positioning, they perform different functions.
Expandable tracks adjust the crawler stance during ground travel. Stabilizing outriggers provide the support required when the platform is elevated.
For the GCT60, the outriggers must be deployed and the machine set up according to the manufacturer's operating instructions before elevated work begins.
[INSERT VIDEO: GLT GCT60 track expansion and outrigger deployment]
Video: GLT GCT60 demonstrating crawler track adjustment and stabilizer setup.
The benefits of adjustable crawler tracks become particularly relevant when a project combines restricted access with outdoor positioning requirements.
Industrial facilities may contain narrow service corridors, equipment access routes, and uneven outdoor approaches.
A tracked boom lift with expandable tracks can be positioned through suitable restricted routes before its stabilizing outriggers are deployed for elevated work.
For utility applications, contractors must also account for electrical clearances, ground conditions, and site-specific safety requirements
Tree trimming and removal projects frequently involve narrow garden gates, landscaped properties, and uneven access routes.
A tracked spider lift with retractable tracks can help contractors reach suitable work areas without requiring the wider access routes associated with some conventional aerial platforms.
The adjustable track stance also provides flexibility during ground positioning. Contractors must still assess ground bearing capacity and protect sensitive surfaces where necessary.
GLT LIFTS tracked spider lift positioned for tree trimming and landscaping maintenance in a residential yard
Historic buildings, shopping centers, and commercial properties often have limited equipment access.
Tracked spider lifts can support tasks such as façade maintenance, exterior repairs, and signage installation when their working envelope and transport dimensions match the site.
Retractable crawler tracks are especially useful where the approach route is narrower than the available working area.
Expandable tracks are adjustable crawler assemblies that allow operators to change the spacing between the left and right tracks. A narrower configuration improves access through restricted routes, while a wider stance provides additional lateral stability during suitable ground travel.
The GLT GCT60 has adjustable track spacing from 2'11" (900 mm) when retracted to 3'11" (1,200 mm) when expanded, providing an adjustment range of 11.8" (300 mm).
Expandable tracks can improve lateral stability during ground travel. However, elevated operation requires proper equipment setup and stabilizing outrigger support. Track expansion does not replace the outriggers.
Some tracked spider lifts can navigate narrow entrances in their transport configuration. Actual clearance depends on the machine's overall width, height, and transport setup. Retracted track spacing alone does not establish doorway compatibility.
Not necessarily. Ground pressure depends on machine weight and the total track contact area. Increasing the spacing between the tracks does not automatically reduce the pressure applied to the ground.
Tracked spider lifts may travel on suitable slopes within the manufacturer's specified limits. Allowable gradeability depends on the machine, travel configuration, surface conditions, and operating instructions. Expanded tracks do not automatically increase the rated slope capability.
