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2) Assemble the front differential housings (#420-013) as shown. You will want to start with one stock Associated diff shim (#3911) and one Diggity Designs diff shim (#420-036) on both sides of the differential. You will make the proper adjustments later if needed. Using four 4-40...
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STEP 1 Steering rack update! Some people have had binding problems with their steering guide bushings. To take care of this problem the one piece brass steering guide bushings #420-024 are now split in to two parts making four brass steering guide bushings. This allows for the steering UPDATE!! guide bushings to move against eachother more freely (if binding occurs, use a little oil or lube for the first run to break the bushings in).
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1) Assemble the rear differential housings (#420-013) as shown. You will want to start with one stock Associated diff shim (#3911) and one Diggity Designs diff shim (#420-036) on both sides of the differential. You will make the proper adjustments later if needed. Using four 4-40 x 1/4 flat head stainless screws (#420-427) secure the left and right side differential housings.
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STEP 3 1) Attach the front inner pin blocks (#420-019) using four 4-40 x 1/4 flat head stainless screws (#420-427) to secure them to the chassis DO NOT FULLY TIGHTEN. NOTE: You will use two 3mm x 8mm flat head stainless screws (#420-030) to attach the servo mounts. 2) Slide the stock Associated hinge pins (#3866) through the aluminum front arms (#420-011).
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STEP 4 1) Attach the rear inner pin blocks (#420-019) using four 4-40 x 1/4 flat head stainless screws (#420-427) to secure them to the chassis DO NOT FULLY TIGHTEN. 2) Slide the stock Associated hinge pins (#3866) through the aluminum rear arms (#420-012). You will use one brass swivel bushing (#420- 026) and one brass washer (#420-062) on each end of the hinge pin as shown.
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STEP 4 OPTIONAL! Rear arms Reverse mounting! In the most recent runnings of the XLR8 kits, racers running indoor on carpet prefer to run the arms in reverse with the shocks on the inside of the arms. This allows for faster transitioning through tight and quick corners. Make sure to UPDATE! use a spacer on the top shock mounting screw to slide the shock out more to level.
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STEP 5 1) Slide the aluminum front/rear shaft support (#420-014) onto the drive shaft (#420-016) followed by one Associated 3/16 x 3/8 bearing (#6906), two Associated shims (#3911) note: the two shims are a starting point and you can adjust later if needed by taking away or adding shims.
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1) Slide the aluminum middle shaft support (#420-015) onto the drive shaft (#420-016) followed by one Associated 3/16 x 3/8 bearing (#6906). Slide the gear adapter (#420-018) and spur gear unit onto the drive shaft past the second small hole, slide the short Diggity Designs pin (#420- 061) through the drive shaft hole and push the gear adapter up to the pin and clip using the Associated Large E clip (#3919).
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STEP 7 1) Attach the drive shaft assembly to the front/rear right and left differential housings (#420-013) by sliding two 4-40 x 3/8 flat head stainless screws (#420-028) through two aluminum countersunk washers (#420-032) and through the top plate (#420-050) on each end. Slide one 4/40 x 1/4 button head stainless screw (#420-431) through the top plate and secure to the motor mount (#420-010).
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STEP 8 1) Slide one Associated 4-40 x 3/4 pan head screw (#7413) through the front shock tower (#420-053) and secure with an Associated 4-40 mini nut (#7260). Slide one Associated long black ball end (#3858) through the front shock tower and secure with an Associated 4-40 mini lock nut (#4449).
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STEP 9 1) In this step you will finally be tightening all the screws. The reason behind this chart is so that you will avoid chassis tweak! After some racing and a few hard hits you will always want to check your chassis tweak, just loosen the listed screws and refer to this chart to re-tighten and re-set your tweak.
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STEP 10 1) Attach the four aluminum battery brace standoffs (#420-058) to the main chassis using four 4-40 x 1/4 flat head stainless screws (#420-427). Use thread lock. 2) Secure the long battery brace (#420-056) to the aluminum battery brace standoffs using two 4-40 x 1/4 flat head stainless screws (#420-427). Secure the short battery brace (#420-057) to the aluminum standoffs using two 4-40 x 1/4 flat head stainless screws (#420-427).
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STEP 10 1) Attach the LIPO brace to the chassis (choose which position of the 3 you want to use) using two 4-40 screws, the included .060 aluminum spacers and the two included standoffs as shown in the picture (spacers in between LIPO brace and main chassis). Attach the battery strap to V2 LIPO the standoffs using two 4-40 screws.
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STEP 11 1) Install the milled bumper (#420-023) to the chassis (#420-055) using three 4-40 x 3/8 flat head stainless screws (#420-028), three 4-40 steel washers (#420-438), and three 4-40 lock nuts (#420-442). Make sure these are nice and snug. Install the two Associated front body posts (#8818) using two 4-40 x 1/2 button head stainless screws (#420-432) 2) Attach the two Associated rear body posts (#8874) to the rear shock tower (#420-054) using two 4-40 x 3/8 flat head stainless screws (#420- 028).
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STEP 12 1) Attach the rear hub carrier Associated (#3876) or we recommend Losi xxx-s 0 degree (#Losa9847) to the aluminum rear arm (#420-012) using the Associated hinge pin (#3866), and two Associated plastic washers (#4187). Secure with set crew on hub carrier. Attach the wheel hexes.
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STEP 13 1) Install the four threaded shocks Associated (#3963) or any comparable threaded shocks using one Associated (#6473) shock bushing and one 4-40 lock nut (#420-442) on the tops. Use one 4-40 x 1/2 button head stainless screw (#420-432) on the bottoms of the shocks. 2) Install your servo as shown using the stock Associated servo mounts (#7336) and mounting hardware.
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STEP 14 1) Install the steering, front suspension, and rear suspension turnbuckles using the recommended starting lengths. You will adjust these later to fine tune after final assembly. 2) Install your motor using two aluminum countersunk washers (#420-032) and two 3mm x 8mm stainless flat head screws (#420-030). 3) Set the batteries on the chassis and see which battery configuration will best suite you.
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STEP 15 1) Install your receiver and speed control as shown. 2) Using the example below, route the servo and personal transponder wire below the drive shaft and on the chassis. You will want to secure it with double sided tape or small wire holds if possible (sold at radio shack and other small electronics stores).
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