Thunderstone Tarp Parts

As an authorized Thunderstone dealer, Trison supplies genuine OEM replacement parts for Thunder 7000 and selected 6000XR tarp systems used on grain and hopper trailers. Whether you’re replacing a failed motor, troubleshooting a remote that won’t respond, or repairing worn arm hardware, you’ll find complete system kits, motors, controllers, keypads, wiring, power cords, tarp bows, bushings, brackets, pivot pins, repair strips, and related hardware to keep your tarp system operating reliably.

What Are Thunderstone Tarp Parts?

Most Thunderstone parts orders start with one of four problems: the tarp will not move, the remote will not talk to the system, the wiring or power connection is damaged, or the arms, bows, bushings, or brackets are worn. This category covers replacement and add-on parts for Thunderstone electric roll tarp systems, especially the Thunder 7000 power tarp system.

The Thunder 7000 is a one-touch electric tarp system that allows the operator to open, close, stop, and reverse tarp direction with one button. Timpte’s Thunder 7000 product information also lists a sealed motor cover, redesigned remote transmitter, ball-and-socket rear bushing, heavy-duty brackets and arms, adjustable pivot joints, constant tarp tension, and easy motor disconnect.

How to Narrow Down the Right Thunderstone Part

Start with the symptom, then confirm the part number. Replacing the part that looks most obvious is not always the cheapest or correct repair.

If the problem is…	Start by checking…	Why it matters
Tarp will not move	Power cord, polarity, battery voltage, circuit breaker, motor terminals	Low voltage or a loose connection can look like a failed motor or controller.
Remote does not work	Remote battery, system reset, remote programming, keypad response	A lost pairing or weak battery can look like a bad receiver or controller.
Keypad flashes red	Flash code count	Each code points to a different issue, such as voltage, overcurrent, overheating, or communication failure.
System stops during travel	Battery condition, amperage supply, motor connections, tarp/arm binding	Intermittent movement can come from power drop, worn motor brushes, or mechanical resistance.
Tarp rolls unevenly	Bows, arms, bushings, brackets, tarp tension, roll tube alignment	A worn bushing or bent bow can create travel problems that are not electrical.

For damaged bows, arms, brackets, or tarp fabric, match by trailer width, mounting location, strut style, and surrounding material condition. These parts are easy to misidentify by appearance alone.

Available Thunderstone Products

Trison’s Thunderstone category includes:

• System and add-on kits: Thunder 7000 Power Tarp System PN 102745-01, hopper add-on PN 102745-03, dump trailer flex-arm add-on PN 104120-03.
• Motors and motor hardware: motor assembly PN 103072, motor mount head PN 104100-01, motor cover PN 101284-03.
• Controls and electronics: remote PN 102810, controller PN 102779, keypad PN 102121, programming tool PN 103262.
• Wiring and power parts: power cord kit PN 577-53363, harness relay PN 101619, motor-to-harness wiring PN 101309, 2-pole plugs.
• Arm, bracket, pin, and bushing parts: mounting brackets, upper arm extrusion, spring knuckles, pivot pins, spherical bushings, stabilizing bushings.
• Tarp bows and repair parts: Timpte 96 inch and 102 inch tarp bows, tarp strap, ridge strap kit, repair strip, front bungee return, rope stretch.

Applications

Thunderstone parts are used on grain trailers, hopper trailers, and Timpte trailer applications.

The Thunder 7000 system is used on all makes and models of grain trailers.

Use the exact part number, trailer application, and system configuration when matching replacement parts. Trailer year, width, and system generation can affect fitment.

Compatibility Guide

The safest way to match Thunderstone parts is by system generation, part number, and where the part sits on the trailer. Similar-looking parts may not fit the same system or location.

Before ordering, confirm:

• Part number: the strongest match when the label, stamping, invoice, or old order history is available.
• System generation: some parts work across Thunder 7000 and 6000XR systems, while others are system-specific.
• Trailer application: grain, hopper, and dump-trailer configurations can use different arm layouts and kit styles.
• Connector style: wrong plugs, poor polarity match, or damaged terminals can prevent operation.
• Mounting location: front, rear, roadside, curbside, and spring-loaded parts should be matched carefully.
• Bow width and strut style: 96 inch and 102 inch bows are not interchangeable.

Product Identification Guide

Start with the Thunderstone part number. Trison product names commonly include PNs such as 103072 for the tarp motor, 102810 for the standard remote, 102779 for the motor controller, 577-53363 for the power cord kit, and 102121 for the one-touch keypad.

If the part number is missing, identify the part by location and function before comparing photos:

• Motor assembly: motor and gearbox at the drive end, motor cover, and motor-to-harness wiring.
• Remote: flip-lid handheld transmitter, button labels, and PN 102810 if visible.
• Keypad or controller: front-of-trailer keypad, nose-mounted control box, wiring, and communication cable connections.
• Power cord or plugs: 2-pole connector style, polarity orientation, cord damage, and corrosion.
• Arm hardware: front/rear position, bracket shape, pivot pin wear, and bushing type.
• Tarp bow or repair part: trailer width, strut style, tear size, and surrounding tarp condition.

If no part number is readable, take photos of the part on the trailer before removing it. Include the mounting location, connector, nearby arm or bracket, and the full tarp system.

Common Replacement Parts

Part	Common Reason	Confirm First
Motor assembly PN 103072	Motor failure, worn brushes, gearbox/motor damage	Voltage, terminals, wiring, and flash-code behavior
Remote PN 102810	Lost remote, failed remote, low battery, lost pairing	Battery, system reset, and programming
Controller or keypad	Control failure, communication issues, no keypad response	Voltage, communication cable, and flash code
Power cord kit PN 577-53363	Damaged cord, corrosion, power loss	2-pole plug condition, polarity, and voltage
Bushings, pivot pins, and arm hardware	Arm looseness, wear, poor movement	Location, housing style, and wear pattern
Tarp bows or repair strip	Bent bow, damaged strut, localized tear	Bow width, strut style, and surrounding tarp condition

Thunder 7000 Troubleshooting Guide

Use Thunderstone’s official Thunder 7000 Tarp System Troubleshooting Guide before replacing expensive electrical parts. The guide points customers toward power, voltage, connection, remote, motor, and communication checks that can prevent ordering the wrong component.

Problem	What to Check First
Remote does not work	Reset trailer power for 15 seconds, power the system on, test again, reprogram the remote, then check remote battery level.
System will not power on	Confirm the 2-pole power cord is plugged in, polarity is correct, and system voltage is 12V to 14.7V. Check circuit breaker, battery terminals, receptacle, corrosion, and voltage at the control box.
System powers on but does not move	Check low voltage, loose or corroded motor terminals, motor wiring damage, and reset power. Continuous green LED flashing after verified connections may indicate worn motor brushes.
Red flash code appears	Count the flashes before ordering parts. Two can indicate overcurrent, three overheating, four overvoltage, five undervoltage, six/seven driver error, and eight communication failure.
Tarp starts and stops during travel	Check battery charge, truck charging system, amperage supply, motor connections, and tarp or arm binding.

Brief orange blinking at startup can be normal while the keypad synchronizes with the control board. If it becomes an 8-code, inspect the communication cable.

Safety note: Thunderstone warns that front and rear arms are spring loaded. Use manufacturer instructions and proper work platforms when servicing motor or arm components.

Buying Guide

A good Thunderstone parts order should confirm three things: the failed function, the system on the trailer, and the part number or location that proves the match.

Before ordering, confirm the part number, power and flash-code checks, trailer application, mounting location, bow width or strut style when applicable, and tarp fabric condition when ordering repair parts.

These checks help prevent the common wrong-order paths: replacing a controller when the issue is voltage, ordering a bow by appearance instead of width, choosing an arm part without confirming its position, or using a repair strip on tarp fabric that is too worn to hold a patch.

Frequently Asked Questions

How do I know which Thunderstone tarp part I need?
Start with the part number if you have it. If not, identify the symptom, system generation, part location, connector, bracket, bow, or arm details before matching photos.

What Thunderstone parts are sold by Trison?
Trison sells Thunderstone motors, remotes, controllers, keypads, wiring, plugs, tarp bows, straps, ridge straps, repair strips, bushings, pivot pins, brackets, arm components, and Thunder 7000 kits.

Does Thunderstone 103072 fit Thunder 7000 and 6000XR systems?
Yes. Thunderstone 103072 is the motor assembly used for Thunder 7000 and 6000XR systems.

What should I check before replacing a Thunder 7000 controller or keypad?
Check trailer power, 2-pole cord connection, correct polarity, 12V to 14.7V supply, circuit breaker, corrosion, motor terminals, and communication-cable condition.

What does five red flashes mean on a Thunder 7000 keypad?
Five flashes indicate under-voltage protection. Check voltage, battery terminals, circuit breaker, power cord, and receptacle plug.

Can the Thunder 7000 be operated manually if power fails?
Yes. The motor drive can be disengaged so the tarp can be operated with the manual crank handle. Follow Thunderstone’s safety instructions before doing this.

Does the Thunder 7000 fit grain trailers other than Timpte?
Yes. The Thunder 7000 is used on all makes and models of grain trailers. Confirm the replacement part, kit style, and trailer configuration before ordering.

Expert Tips

Expert Tip: Do the voltage check before buying a controller.
A weak battery, loose plug, or corroded terminal can make the keypad and controller look bad even when they are not the failed part.

Expert Tip: Write down the flash code.
A red flash code can separate a power issue from a communication issue before parts are ordered.

Expert Tip: Photograph the part before removing it.
For arm, bracket, bushing, and wiring parts, the mounting location often matters as much as the part itself.

Expert Tip: Keep the manual crank hardware.
The existing crank attachment can be used as a backup if the motor is damaged or the system cannot be powered.

Expert Tip: Match Timpte bows by width and strut style.
Trison lists 96 inch and 102 inch Thunderstone/Timpte bows, with and without struts. Width alone is not enough.

Why Buy From Trison

Trison’s Thunderstone category groups Thunderstone system kits, motors, controls, wiring, arm hardware, tarp bows, and repair parts by recognizable manufacturer part numbers. That helps customers move from a real shop problem, such as no power, a failed remote, a damaged bow, or worn arm hardware, to the right replacement category.

For uncertain matches, customers should contact Trison with the part number, photos, system type, trailer application, and connector details before ordering