The Maxon Tuck-Under GPTLR Series is a heavy-duty tuck under liftgate designed for dry freight truck bodies and trailers. As part of the Tuk-A-Way® category, the GPTLR combines high lifting capacities, large aluminum platform configurations, and level ride geometry that allows the platform to sit completely flat on the ground when lowered.
This article provides a technical overview of the GPTLR models, specifications, fitment requirements, and feature configurations.
- Documentation Resources from Maxon
- What the GPTLR Series Is
- GPTLR Models & Rated Capacities
- Platform Configurations & Sizes
- Bed Height & Vehicle Fitment Requirements
- Standard & Optional Features Overview
- Total Weight of The Liftgate
- Conclusion
Documentation Resources from Maxon
Information in this article is sourced exclusively from official Maxon GPTLR documentation, as well as LiftGateMe’s technical review of those documents. Always refer to your specific liftgate’s manuals for complete procedures and serial number, model, and year-specific requirements.
Reference PDFs used:
What the GPTLR Series Is
The Maxon GPTLR belongs to the Tuk-A-Way® Series (Maxon-GPTLR-Brochure.pdf, p.1). It is designed to handle carts and pallets, with the platform described as riding level all the way to the ground and sitting completely flat when lowered (Maxon-GPTLR-Brochure.pdf, p.1).
Maxon states clearly:
“The GPTLR is designed for dry freight body and trailer applications only.”
(Maxon-GPTLR-Brochure.pdf, p.2)
The brochure further specifies that the gate is not designed for flatbed, swing door, or refrigerated applications (Maxon-GPTLR-Brochure.pdf, p.1).
Within the Tuk-A-Way® category, the GPTLR is identified as featuring “the largest platform ever made for a Tuk-A-Way®” (Maxon-GPTLR-Brochure.pdf, p.1).
GPTLR Models & Rated Capacities
The Maxon GPTLR Series is available in four rated capacities:
- GPTLR-25 — 2,500 lbs
- GPTLR-33 — 3,300 lbs
- GPTLR-44 — 4,400 lbs
- GPTLR-55 — 5,500 lbs
These capacities are confirmed in the Operation Manual warning section (Maxon-GPTLR-Operation-Manual-rev-B-2023.pdf, p.5).
Capacity Decals
Capacity decals are model-specific and identified in the Installation Manual:
- 2,500 lbs — P/N 220382
- 3,300 lbs — P/N 220388-02
- 4,400 lbs — P/N 253155
- 5,500 lbs — P/N 253161
(Maxon-GPTLR-Installation-Manual-rev-B-2023.pdf, p.81, Table 81-1)
These decals correspond directly to the model capacities listed in the Operation Manual.
Platform Configurations & Sizes
The GPTLR platform is aluminum and includes several structural features described in the product brochure.
Platform Dimensions
For 102” wide vehicles:
- 60” × 86” aluminum platform with 10” fixed ramp
- 68” × 86” aluminum platform with 10” aluminum retention ramp
(Maxon-GPTLR-Brochure.pdf, p.1)
For 96” wide vehicles, the platform width is 80” (Maxon-GPTLR-Brochure.pdf, p.1).
The brochure also notes that the GPTLR may not work with some dock plates on 96” wide bodies or trailers (Maxon-GPTLR-Brochure.pdf, p.1).
Ramp Configurations
Two ramp configurations are listed:
- 10” fixed ramp
- 10” aluminum retention ramp
(Maxon-GPTLR-Brochure.pdf, p.1)
Retention ramps help keep wheeled carts from rolling off the platform (Maxon-GPTLR-Brochure.pdf, p.1).
Platform Construction Details
The brochure specifies:
- Improved recessed hinge (Maxon-GPTLR-Brochure.pdf, p.1)
- MAX GRIP® surface treatment standard (Maxon-GPTLR-Brochure.pdf, p.1–2)
- Dual assist torsion springs to minimize opening and closing force (Maxon-GPTLR-Brochure.pdf, p.2)
The Maintenance Manual terminology diagram identifies a “SPRING-ASSIST TORSION BAR” within the liftgate assembly (Maxon-GPTLR-Maintenance-Manual-rev-B-2023.pdf, p.10).
Have a question? We'd love to hear from you.
No liftgate serial number? Click here for a visual guide to locate it, then contact us.
Bed Height & Vehicle Fitment Requirements
Proper fitment is critical when selecting a tuckunder liftgate like the GPTLR.
Standard Bed Height Range
- 44” minimum bed height (loaded)
- 55” maximum bed height (unloaded)
(Maxon-GPTLR-Brochure.pdf, p.1)
The Installation Manual confirms this vehicle height range for standard configurations (Maxon-GPTLR-Installation-Manual-rev-B-2023.pdf, p.10).
CMVSS Underride Height Requirement
For GPTLR-44 and GPTLR-55 models equipped with CMVSS-certified underride guards, the Installation Manual specifies a minimum bed height of 49” (Maxon-GPTLR-Installation-Manual-rev-B-2023.pdf, p.10).
The CMVSS brochure confirms that CMVSS rear impact guards are available on GPTLR-44 and GPTLR-55 models (Maxon GPT-GPTLR-CMVSS-Certified-Rear-Guards-Brochure.pdf, p.1).
Standard & Optional Features Overview
Standard Features
The GPTLR includes the following standard features:
- ICC bumper standard (Maxon-GPTLR-Brochure.pdf, p.1)
- MAX GRIP® surface (Maxon-GPTLR-Brochure.pdf, p.1–2)
- Cycle Counter standard (Maxon-GPTLR-Brochure.pdf, p.1)
- Fully galvanized finish — standard (Maxon-GPTLR-Brochure.pdf, p.1–2)
- Shipped fully assembled (Maxon-GPTLR-Brochure.pdf, p.2)
The brochure states that the liftgate is shipped fully assembled, pre-wired, and plumbed, and installs as one piece (Maxon-GPTLR-Brochure.pdf, p.2).
Pump & Motor Assembly
The pump and motor are factory wired and installed and are shipped with oil in the reservoir (Maxon-GPTLR-Brochure.pdf, p.2).
The assembly is protected by its cover and the main frame, and the removal bolt is protected with a lockable steel collar to discourage theft (Maxon-GPTLR-Brochure.pdf, p.2).
Optional Features (High-Level)
Optional features listed in the brochure include:
- Cart stops (available on aluminum platforms only)
- Aluminum retention ramp
- Dual controls
- Street-side controls
- Cab cut-off
- Hand-held controls
- Auxiliary hand pump
- FMVSS or CMVSS compliant trailer underride (GPTLR-44 and GPTLR-55 only)
(Maxon-GPTLR-Brochure.pdf, p.2; Maxon GPT-GPTLR-CMVSS-Certified-Rear-Guards-Brochure.pdf, p.1)
The Operation Manual defines cart stops as preventing loaded carts from rolling off the outboard end of the platform (Maxon-GPTLR-Operation-Manual-rev-B-2023.pdf, p.25).
Conclusion
The Maxon GPTLR Series is a high-capacity tuck-away liftgate engineered specifically for dry freight truck bodies and trailers. With rated capacities from 2,500 to 5,500 pounds, multiple aluminum platform configurations, galvanized construction, and optional CMVSS-certified underride availability on select models, the GPTLR provides a configurable solution within the Tuk-A-Way® category.
When evaluating a tuck under liftgate for sale, fleets should verify:
- Required rated capacity
- Platform configuration (fixed ramp vs. retention ramp)
- Vehicle body width (96” vs. 102”)
- Bed height compatibility
- Underride compliance requirements
For model selection support or liftgate parts assistance, contact our Team at LiftGateMe for help matching the correct GPTLR configuration to your vehicle application.
Subscribe to keep in touch
Get our content delivered directly to your inbox. We're offering powerful content to keep you lifting throughout the year. Keep in touch with us to see why we're your Single Source partner for all things liftgate.
Related Content
How to Safely Operate a Maxon GPTLR Tuck Under Liftgate
According to the Operation Manual, incorrect operation can result in serious personal injury, and untrained persons must not operate the liftgate. This guide walks you step-by-step through proper operator procedure using only the official Operation Manual.
Read More
How Maxon’s GPTLR Tuck-Under Delivers True Level Ride Performance
This article explains how Maxon documents that level ride behavior and identifies the structural components and load handling principles that support stable operation. This discussion focuses strictly on mechanical design and documented load placement guidance
Read More
Maxon GPTLR Maintenance: Daily Inspection Checklist for a Tuck Under Liftgate
Daily inspection is defined as the operator's responsibility in the Maxon manuals. These checks are not optional. They are required to confirm the liftgate is safe to cycle and free of visible damage or system failure. Discover how to conduct them step-by-step and properly.