Common Problems of Trailer Jacks and How to Maintain Them

Why Trailer Jack Maintenance Matters

For RV manufacturers and fleet operators, trailer jack reliability directly affects customer satisfaction and warranty costs. A failed jack can leave an RV owner stranded or unable to set up camp.

Understanding common failure modes and implementing preventive maintenance can significantly extend jack life and reduce field failures.

Common Problem #1: Corrosion

Symptoms: Rust on the outer tube, pitting on chrome surfaces, difficulty extending or retracting.

Causes:

• Exposure to road salt and moisture
• Lack of protective coating
• Scratches or chips in the powder coating

Prevention:

• Choose jacks with quality powder coating (Henghong uses salt spray-tested coating rated for 72 hours)
• Apply dielectric grease to exposed threads
• Wash jacks after exposure to road salt
• Touch up any coating chips immediately

For heavy-duty applications, consider zinc-nickel plated jacks which offer 100-hour salt spray resistance.

Common Problem #2: Motor Failure

Symptoms: Jack does not extend or retract, unusual noises, tripped circuit breaker.

Causes:

• Overloading beyond rated capacity
• Continuous operation without cool-down
• Voltage drop due to undersized wiring
• Water ingress into the motor housing

Prevention:

• Never exceed the rated load capacity
• Allow motor to cool between extended operations
• Use properly sized wiring (minimum 10 AWG for 12V systems)
• Ensure motor housing seals are intact

Henghong electric jacks are tested for 600+ cycles and include thermal protection to prevent motor damage.

Common Problem #3: Bent or Damaged Jacks

Symptoms: Jack appears angled or crooked, binds during extension, visible bends in the tube.

Causes:

• Lateral (side) loads exceeding design limits
• Driving with jacks partially extended
• Impact with road debris
• Overloading

Prevention:

• Always fully retract jacks before driving
• Use stabilizer jacks to handle lateral loads
• Stay within rated load capacity
• Inspect jacks after any road impact

Common Problem #4: Gear and Thread Wear

Symptoms: Grinding noise, rough operation, jack slips under load.

Causes:

• Lack of lubrication
• Contamination from dirt and debris
• Wear from normal use over time

Prevention:

• Lubricate gears and lead screws every 6 months
• Use a lithium-based grease for gears
• Apply white lithium grease to lead screws
• Keep jacks clean and dry when not in use

Common Problem #5: Electrical Issues

Symptoms: Intermittent operation, slow speed, control panel errors.

Causes:

• Poor ground connection
• Corroded wiring connectors
• Low battery voltage
• Blown fuse

Prevention:

• Clean and tighten all electrical connections annually
• Apply dielectric grease to connectors
• Check battery voltage regularly (should be above 12.4V)
• Keep spare fuses on hand

Preventive Maintenance Schedule

When to Replace vs. Repair

• Minor surface rust: Clean and touch up coating
• Motor failure: Replace motor unit if available, otherwise replace jack
• Bent tube: Replace �?bending compromises structural integrity
• Worn gears: Replace gear assembly or entire jack
• Hydraulic leaks: Replace seals or cylinder assembly

Why Quality Matters from the Start

Investing in quality jacks from a reputable manufacturer reduces maintenance issues and warranty claims. Henghong electric jacks feature:

• Salt spray-tested powder coating (72 hours)
• 600+ cycle durability testing
• Overload protection
• 1-year warranty
• CE certification

For OEM buyers, specifying Henghong jacks means fewer field failures and lower lifetime support costs.

Need replacement parts or technical support? Contact our team for assistance.