Arrma Kraton 6S Parts Diagram: Component Guide 2026
The Arrma Kraton 6S parts diagram illustrates the full exploded layout of the 1/8 scale RC chassis system. It details the 3-diff drivetrain configuration, aluminum shock towers, heavy-duty suspension arms, and Spektrum Firma 150A ESC system layout. Part numbers identify exact OEM replacement hardware like differential ring gears and hub bearings.
📌 Key Takeaways
- Provides precise OEM part numbers (e.g., ARA310931 diff gear set) for exact replacement matching.
- Maps out the 3-differential layout system to ensure proper shim placement and gear backlash adjustment.
- Details torque specs and fastener sizes, preventing stripped M3/M4 threads in aluminum chassis plates.
- Identifies high-wear component zones including center diff outdrives, hub bearings, and pillow ball inserts.
- Enables structured DIY tear-downs without misplacing assembly hardware or internal spacers.
Maintaining, upgrading, and repairing high-performance 1/8 scale RC vehicles like the Arrma Kraton 6S BLX requires a precise understanding of its mechanical assembly. Operating on a 22.2V 6S LiPo configuration, the Kraton 6S drives extreme power through a hardened steel drivetrain, requiring exact component alignment, proper gear backlash, and specific differential fluid viscosities. Utilizing an official factory blueprint or exploded view schematic allows technical builders to locate part numbers, identify structural tolerances, and execute complete chassis teardowns without damaging precision aluminum and composite assemblies. According to OEM specifications, referencing the correct layout ensures factory-grade torque specs and gear alignment are maintained during heavy-duty maintenance cycles.
Arrma Kraton 6S Parts Diagram: Main Structural Systems and Layout
The chassis layout of the Arrma Kraton 6S BLX is engineered around an anodized 3mm 6061-T6 (or 7075-T6 in EXB variants) aluminum chassis plate reinforced with heavy-duty aluminum center braces. The entire system is subdivided into three major mechanical modules: the front suspension and steering clip, the central power and drivetrain module, and the rear suspension and wing mount assembly. Understanding how these isolated sub-assemblies interconnect according to the official technical schematic is critical for efficient maintenance and component replacement.
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Drivetrain and Differential Assembly Components
The three-differential system distributes 6S brushless torque to all four wheel hubs. The front and rear differential assemblies utilize steel spiral-cut crown and input pinion gears housed inside composite bulkheads (Part ARA310931). The center differential acts as the power divider, utilizing a 46T Mod 1 steel spur gear bolted to an aluminum differential case filled with high-viscosity silicone fluid. Heavy-duty steel driveshafts, including front universal joint driveshafts (CVDs) and rear dogbones (Part ARA310926), transfer rotational force to the outer axle stubs through sealed 15x21x4mm ball bearings. For detailed dynamic force calculations during high-speed runs, refer to our technical guide on gear ratio calculations.
Suspension Geometry and Aluminum Chassis Structure
The suspension structure relies on wide-track composite lower suspension arms paired with steel pivot ball suspension geometry (Pillow Ball Suspension / PBS). Double-wishbone suspension design allows independent adjustment of camber, toe-in, and caster angles. Shock absorption is managed by large-bore 16mm aluminum oil-filled shocks featuring 4mm stainless steel shock shafts, mounted directly to CNC-machined 5mm aluminum shock towers (Part ARA320500). Lower hinge pins (Part AR330201) are captured by aluminum hinge pin braces with composite inserts, providing adjustable anti-squat, kick-up, and toe configurations.
Power System Configuration and Electronics Integration
The electronic power layout integrates a Spektrum Firma 150A Smart ESC wired to a Spektrum Firma 4074 2050Kv sensorless brushless motor via 6.0mm bullet connectors. The motor is mounted onto a two-piece sliding aluminum motor mount plate (Part ARA320468), which simplifies mesh adjustment against the center spur gear. Steering is executed through a dual-bellcrank steering system with an integrated adjustable servo saver (Part AR340008), driven by a metal-gear digital servo running on 6.0V or 7.4V BEC output.
| System Module | OEM Part Number | Component Description | Factory Specification / Fluid |
|---|---|---|---|
| Center Differential | ARA310931 | 46T Mod 1 Steel Center Diff Set | 100,000 cSt Silicone Oil |
| Front Differential | ARA310927 | Spiral Cut Crown & Pinion Set | 10,000 cSt Silicone Oil |
| Rear Differential | ARA310927 | Spiral Cut Crown & Pinion Set | 10,000 cSt Silicone Oil |
| Motor Mount Assembly | ARA320468 | Sliding Aluminum Motor Plate | M4 Fasteners / Blue Threadlock |
| Shock Absorbers | ARA330621 | 16mm Aluminum Oil-Filled Shocks | 500 cSt (40wt) Silicone Oil |
How to Read the Arrma Kraton 6S Schematic for Servicing
Exploded view schematics for the Arrma Kraton 6S serve as technical blueprints, displaying every fastener, washer, bearing, and structural part in exploded proximity to its installed location. Correctly interpreting these schematics prevents assembly errors, missing shims, and incorrect threadlock application during maintenance procedures.
Interpreting Fastener Callouts and Explosive Layout Numbers
Every fastener in the parts schematic is identified by metric dimensions and head style codes. For example, a callout formatted as “Cap Head Screw M3x12mm” or “Button Head Screw M4x16mm” indicates metric thread diameter followed by overall thread length. Flat head countersunk screws are used on the bottom of the aluminum chassis to ensure a flush finish, while cap head screws secure aluminum shock towers and motor mounts where clamping force is critical. Pay close attention to line paths in the blueprint, which demonstrate the precise sequence of washers, o-rings, and spacers relative to structural housings.
Navigating Differential Shimming and Mesh Calibration Schematics
Proper differential longevity depends on precise gear shimming. The exploded schematic illustrates the exact placement of 13x16x0.2mm steel shims (Part ARA709031) on input pinion shafts and differential planet gear outdrives. Shims placed on the crown-gear side of the differential case push the ring gear closer to the input pinion, reducing gear lash under load. Conversely, moving shims to the opposite outdrive pushes the ring gear away. Check out our comprehensive guide on differential shimming procedures to learn how to properly measure gear tolerances during rebuilding.
Executing Complete Drivetrain Teardown and Rebuild Sequences
To tear down the chassis according to factory exploded views, proceed systematically through isolated sub-assemblies:
- Step 1: Module Separation: Remove the four bottom chassis screws securing the front steering clip and unbolt the center chassis brace (Part ARA320503) to detach the front module. Repeat for the rear wing and shock tower assembly.
- Step 2: Central Drivetrain Removal: Loosen the two top screws holding the center diff top plate, pull the slider plate, and lift out the center differential and 46T spur assembly.
- Step 3: Gear Case Disassembly: Unbolt the bulkhead upper covers to access front and rear differential units, inspecting input pinion bearings (8x16x5mm) for wear.
- Step 4: Clean and Inspection: Degrease metal gears, inspect internal satellite gears for tooth deformation, and replace worn silicone diff O-rings.
Factory torque specs: M3 screws into aluminum must be torqued to 1.2–1.5 Nm using medium-strength blue threadlock (LOCTITE 242). M4 motor plate screws require 2.5–3.0 Nm. Do not use threadlock on composite plastic parts, as chemical solvents will degrade the polymer structure.
Diagnosing Mechanical Failures with the Arrma Kraton 6S Blueprint
Heavy bashing and 6S power delivery subject mechanical components to severe fatigue. Combining diagnostic symptoms with exploded view diagrams allows technicians to pinpoint failed components and repair underlying structural issues quickly.
Identifying Drivetrain Slop and Strip Pinion/Spur Gear Mesh
A loud grinding noise or high-pitched screeching during acceleration indicates loss of gear mesh between the pinion gear (Part AR310439) and the central 46T Mod 1 spur gear. According to manufacturer specs, improper gear backlash allows the hardened steel pinion to ride on the tips of the spur gear teeth, causing premature wear or stripping. Inspect the two-piece sliding motor mount (Part ARA320468) on the schematic. Ensure the clamping bolt is secured with threadlock and set gear mesh using a standard strip of paper (0.07–0.10mm clearance) between gear teeth before tightening.
Resolving Steering System Binding and Servo Saver Misalignment
Inconsistent steering return or servo strain often stems from tight pivot balls or binding inside the dual-bellcrank assembly. The exploded steering diagram illustrates two 8x12x3.5mm bearings resting on aluminum bellcrank posts. Dirt intrusion locks these bearings, forcing the servo saver spring (Part AR340008) to absorb turning force. Disassemble the steering linkage, replace seized bearings, and adjust the knurled servo saver tension nut so that 2–3mm of thread is exposed under nominal spring tension.
Correcting Differential Fluid Leakage and Internal Satellite Gear Stripping
If the vehicle exhibits single-wheel spinouts (“diffing out”), fluid has leaked from the differential housing or internal sun and planet gears (Part ARA310982) have stripped. Refer to the differential breakdown layout to replace internal rubber cross-shaft seals and paper housing gaskets. Re-fill front, center, and rear diff housings to 80% capacity with high-viscosity silicone oil to account for thermal expansion under heavy 6S operation. Review our full guide on 6S LiPo battery safety protocols to ensure optimal electrical discharge rates without overheating motor or differential assemblies.
Never operate the Arrma Kraton 6S with missing differential shims or loose chassis brace bolts. Operating under 6S line voltage (25.2V max peak) with improper gear mesh will instantly shear gear teeth and flex the main aluminum chassis plate.
Arrma Kraton 6S Configuration and Component FAQs
What are the factory differential oil weights shown in the Arrma Kraton 6S layout?
The standard factory differential oil weights for the Kraton 6S BLX are 10,000 cSt silicone oil for the front differential, 100,000 cSt for the center differential, and 10,000 cSt for the rear differential. Extreme Extreme Bash (EXB) models or customized high-traction setups often run heavier center diff fluid (up to 200,000 cSt or 500,000 cSt) to prevent front tire ballooning under high-acceleration conditions.
How do V5 and EXB versions differ on the Arrma Kraton 6S parts schematic?
While the overall chassis layout remains identical, EXB (Extreme Bash) schematics feature upgraded components including a 7075-T6 aluminum chassis plate, larger 29mm differential cases with limited-slip plates, 5mm 7075-T6 anodized shock towers, heavy-duty aluminum chassis braces, and thicker 5mm turnbuckles compared to the standard V5 6S BLX configuration.
Where are the critical threadlock points indicated on the chassis blueprint?
Medium-strength blue threadlock is strictly required on every metal-to-metal fastener thread depicted in the schematic. Key locations include motor mount clamping screws, motor pinion gear set screw (M4 cup point), steering bellcrank post screws, wheel axle drive cup set screws, front/rear sway bar set screws, and shock tower mounting bolts into aluminum standoffs.
How do you measure gear pitch and motor pinion alignment using the exploded diagram?
The Kraton 6S drivetrain utilizes 1.0 Metric Module (Mod 1) gear pitch across all primary drive components. Pinion gear alignment is measured by sliding the motor along the two-piece aluminum slider plate visible in the schematic until the full face of the pinion gear fully engages the 46T spur gear width without rubbing against the composite center diff cover.
What bearing sizes are utilized across the Arrma Kraton 6S hub and diff assemblies?
The main schematic specifies rubber-shielded precision ball bearings throughout the chassis: outer wheel hubs use 15x21x4mm inner and 8x16x5mm outer bearings; differential outdrives use 15x21x4mm bearings; differential input pinions utilize 8x16x5mm bearings; and the dual-bellcrank steering assembly operates on 8x12x3.5mm bearings.
Step-by-Step Guide to Understanding the Arrma Kraton 6S Parts Diagram
Identify – Select the target sub-assembly section on the Arrma Kraton 6S parts diagram.
Locate – Find the specific component callout number and matching OEM part code.
Reference – Study the exploded layout line to observe hardware orientation and shim sequence.
Connect/Route – Assemble or route wires and mechanical links following the illustrated order.
Verify – Check gear mesh, suspension movement, and fastener tightness against factory configuration.
Troubleshoot – Consult the diagram layout if binding or improper alignment occurs post-assembly.
