Mobile Landing Gear Repair
Lathrop • Stockton • Manteca
On-site emergency service for collapsed landing gear legs, stuck cranks, and kingpin wear compliance. We serve distribution centers and fleet yards across the greater Stockton-Lathrop logistics corridor. Fleet yards 100+ trailers across Northern California including Tracy, Modesto, Sacramento, Roseville, Fairfield, Dixon, Elk Grove, West Sacramento & Woodland. No roadside, no freeway work.
🚨 The Challenge: 3 Trailers Grounded at Major Lathrop Logistics Yard
Location: Lathrop, CA (95330) • Issue: Collapsed landing gear under full cargo load • Impact: Severe dock bottleneck
A logistics fleet manager contacted TruMac with an urgent problem: three 53' dry vans had been red-tagged and immobilized after their landing gear legs collapsed under the weight of fully loaded cargo. These "dropped trailer" failures created a severe bottleneck at the loading dock.
Common Landing Gear Failure Symptoms
Seized gears or bent legs preventing proper extension
Structural failure or missing welds from fatigue
Complete leg failure requiring immediate replacement
Stripped gears inside housing needing gearbox service
The TruMac Solution: On-Site Structural Repair
1️⃣ Lifting & Stabilization
Used heavy-duty hydraulics to safely lift the fully loaded trailers off the collapsed nose. Stabilized the frame with jack stands to prevent shifting during repair.
2️⃣ Landing Gear Replacement
Cut out damaged legs with plasma torch. Welded in new Jost heavy-duty landing gear sets (rated for 50,000 lbs static load) using certified structural welding.
3️⃣ Cross-Member Reinforcement
Repaired bent cross-members and reinforced mounting plates to ensure structural integrity for future heavy loads. Added gusset plates where needed.
🔍 The "TruMac Difference" – Kingpin Inspection Upsell
Complimentary Fleet Safety Inspection
While on-site for the landing gear repair, we performed a complimentary inspection of the fleet's coupling devices and kingpins. Our technician identified two trailers with worn kingpins approaching the California legal wear limit of 0.25 inches.
We immediately scheduled a follow-up for our specialized Kingpin Resurfacing & Replacement service, preventing a future BIT (Biennial Inspection of Terminals) failure and potential DOT citations.
This proactive inspection saved the fleet thousands in downtime and compliance issues.
Learn about our kingpin replacement service (rare specialty) →
Specialized Services: Landing Gear • Kingpin • Structural
TruMac Fleet Services provides mobile trailer repair specifically for fleet yards, distribution centers, and terminals. We do NOT provide roadside tire service, freeway emergency work, or towing.
🔧 Landing Gear Services
- Emergency replacement for collapsed or seized legs
- Jost, Holland, SAF-Holland gear installation
- Cross-member repair and reinforcement
- Gear lubrication and preventive maintenance
- Crank handle replacement and gearbox service
🔍 Kingpin Services (Rare Specialty)
- Kingpin wear inspection with precision gauges
- BIT compliance checks (California 0.25" wear limit)
- Kingpin resurfacing (add material back)
- Kingpin replacement (full press-out and install)
- Fifth wheel coupling diagnostics
⚠️ Why Kingpin Wear Matters for California Fleets
California law requires kingpin wear to be less than 0.25 inches. Excessive wear creates a loose coupling that can lead to trailer separation, a catastrophic safety failure. BIT inspections will red-tag any trailer exceeding this limit.
Most fleet managers don't check kingpins regularly — they only discover the problem during a roadside inspection or annual BIT audit. TruMac's complimentary kingpin inspection during other repairs helps you catch wear before it becomes a citation.
Related Services: 90-day BIT inspections | Air bag suspension | Hitch & coupler repair
FAQ: Landing Gear & Kingpin Service
How long does a landing gear replacement take?
A typical landing gear replacement takes 3-5 hours per trailer, depending on the severity of the damage and whether cross-member reinforcement is needed. For emergency service (collapsed legs with cargo on board), we can typically get one trailer mobile within 4-6 hours from dispatch.
Can you replace landing gear on loaded trailers?
Yes. We use heavy-duty hydraulic jacks to safely lift and stabilize loaded trailers. We can replace landing gear on trailers carrying up to 45,000 lbs of cargo without unloading. This is critical for time-sensitive freight where unloading isn't an option.
What is the California kingpin wear limit?
California law requires kingpin wear to be less than 0.25 inches (1/4 inch) as measured from the original diameter. We use precision kingpin wear gauges to measure exactly where your fleet stands. Trailers exceeding this limit will be red-tagged during BIT inspections.
Do you stock Jost, Holland, and SAF-Holland landing gear?
Yes. We stock and install Jost, Holland, and SAF-Holland landing gear assemblies. These are the three major brands used in commercial fleets. We can also fabricate custom mounting plates and cross-members if your trailer has non-standard configurations.
What other project examples do you have?
We have documented case studies including door frame repair in Roseville, air brake service in West Sacramento, fleet PM in Elk Grove, and more throughout Northern California.
Roseville door frame project →
West Sacramento air brake project →
Elk Grove fleet PM project →
What size fleets do you work with?
We specialize in fleet yards operating 100+ commercial trailers across Northern California. No roadside or freeway service.
Emergency Landing Gear & Kingpin Service
Trailers grounded with collapsed legs? Kingpins approaching California wear limit? Same-day and next-day service for fleet yards. Lathrop, Stockton, Manteca, Northern California. Fleet yards 100+ trailers only.
📞 CALL (916) 320-2425