OEM Continuous-Duty Hydraulic Pump Relay

The KTI 391-19 12V DC start solenoid is a heavy-duty, 125-amp continuous-duty relay used to supply consistent power to dump trailer hydraulic pump motors.

Built with zinc-coated steel for corrosion resistance, this solenoid is designed to withstand demanding outdoor job-site conditions while delivering dependable voltage to your hydraulic system.

This unit is commonly installed on trailers equipped with KTI Power Up / Power Down hydraulic pump assemblies.

📐 Specifications

🔍 What This Solenoid Does

The start solenoid:

✔ Connects battery power to hydraulic motor
✔ Handles high current loads during lift operation
✔ Prevents voltage drop
✔ Ensures smooth pump startup
✔ Protects electrical system

If your pump clicks but doesn't run — this is often the failed component.

🛠 Verified Fitment & Brand Applications

This solenoid is commonly used on trailers equipped with KTI hydraulic power units, including models from:

Dump Trailer Manufacturers Using KTI Power Units

• PJ Trailers

• Load Trail

• Diamond C

• Lamar

• Griffin

• Watchdog

• Iron Bull (select models)

• Norstar Dump Beds

• Sure-Trac (KTI-equipped units)

• Southland Trailer (KTI-equipped units)

• Midsota (select dump models)

• CAM Superline (KTI-equipped units)

• Top Hat Trailers (select models)

• Texas Pride (certain hydraulic configurations)

⚠ Important:
Fitment depends on whether the trailer is equipped with a KTI hydraulic pump system. Not all trailers from these brands use KTI — always verify pump manufacturer.

🧩 Common Compatible KTI Pump Systems

Used on:

• KTI double-acting hydraulic pumps
• KTI gravity-down pump units
• Power Up / Power Down pump assemblies
• 12V dump trailer hydraulic motor systems

Typically paired with:

• DC36 series
• DC365 series
• KTI 25-3 assemblies
• PJ-branded KTI hydraulic units

💪 Key Features

✔ 125 Amp Continuous Duty

Handles sustained hydraulic pump load without overheating.

✔ Trombetta OEM Quality

Made by Trombetta, one of the most trusted names in heavy-duty solenoids.

✔ Corrosion-Resistant Housing

Zinc-coated steel resists rust and environmental wear.

✔ Direct Replacement

Fits directly in place of factory-installed solenoids on KTI systems.

✔ Heavy-Duty Reliability

Built for daily commercial use on construction and agricultural equipment.

🚛 In Stock & Ready to Ship

Restore dependable hydraulic power today with the KTI 391-19 heavy-duty start solenoid.

Common Hydraulic Pump System Components

• View KTI DC36RA Hydraulic Pump
• View KTI 395-55 Pendant Remote
• View KTI 74-06 Extension Cord
• View KTI KWR-005 Wireless Remote

📋 KTI Catalog Data

• Type: Heavy-Duty DC Start Solenoid
• Voltage: 12V DC
• Function: Engages motor to start hydraulic pump
• Terminal: 2-terminal configuration

🏭 About KTI Hydraulics

KTI Hydraulics Inc. — founded 1997 in Tustin, California. ISO 9001:2015 Certified. Every KTI power unit is 100% factory inspected and tested to stringent specifications before shipping. Inventor of the patented Universal Manifold® system used in dump trailers worldwide.

📞 Call/Text: 517-225-1991 🌐 AAATrailer.com

🔄 Cross Reference / Alternate Part Numbers

KTI 391-19 | KTI-391-19 | 39119 | Start relay solenoid single-acting

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• Address: 4675 East Grand River Ave, Howell, MI 48843
• Phone: (517) 225-1991 (Call or text)
• Hours: Monday to Friday: 10:00 AM - 5:30 PM | Saturday: By appointment

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