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aDJUSTINg ThE DIFFErENTIalS
The X-Terminator 2 RTR Nitro Buggy features front, centre and rear bevel gear differentials that each feature O-Ring seals and
cup-style housings. All three differentials are packed with differential grease that is good for most driving conditions. you can make
fine-tuned adjustments to each differential by removing the differentials from the chassis, opening them up and replacing the grease
with different weights of silicone differential oil.
●
Front and rear Differentials:
Adding heavier silicone oil will tighten the differentials and adding lighter silicone oil will loosen the
differentials. If your xT2 feels loose (uncontrollable) during turns, you can tighten the front differential or loosen the rear differential.
If your xT2 is pushing (understeer) during turns, you can loosen the front differential or tighten the rear differential.
●
Centre Differential:
For the centre differential, using a lighter weight oil will cause the differential to unload easier. Generally, this
is good for loose tracks with little traction. Using a heavier weight will provide a more even amount of power to the front and rear. On
loose tracks, this can cause the xT2 to be too "squirrely" (uncontrollable) or cause the rear end to slide out. For this reason, we only
suggest using heavier oil if you are driving on a high-traction surface.
For general use, we recommend using Xtm racing 30K oil in the front, 50K in the centre and 10K in the rear.
❑
Remove the upper hinge pins, then remove the screws that hold the upper hinge
pin support plate in place. Remove the upper and lower hinge pin support plates.
❑
Pull the front half of the differential case straight out, then remove the hinge pins
and drop the lower suspension arms and pull the differential assembly straight out.
❑
Remove the screws from the bottom of the chassis that hold the front bumper and
the differential assembly in place.
❑
Use a small flat blade screwdriver to pry the screw cover off the front of the bumper
and remove the two screws from inside the bumper, then remove the bumper.
❑
Remove the four screws that hold the differential housing together, then pull the
differential housing apart and pull the differential assembly out of the differential housing,
making sure to leave the pinion gear in place.
❑
you can now disassemble the differential, clean away all of the grease, reassemble
and refill the differential with the differential oil of your choice.
For your convenience, we show you how to remove and disassemble the front differential. Removing and disassembling the centre
and rear differential is similar.
Please refer to the differential assembly drawing on page 25 for a detailed break-down of the differential
assembly.
❑
Push one ball bearing onto the differential cup.
❑
Push the output joint into the differential cup, then push one small pin into the hole in the output joint, making sure that the pin is centred. Install the pin through the
hole in the side of the differential cup
(a)
.
❑
Install the large bevel gear into the differential cup, making sure that the slot in the back of the bevel gear fits over the pin in the output joint.
❑
Install two small bevel gears onto each pin, then install the small bevel gear assemblies into the differential cup, making sure that the flat spots in the pins cross over
each other and that the ends of the pins fit in the slots in the side of the differential cup
(b)
.
❑
Install one grub screw into the side of the differential cup, then fill the differential cup full with differential oil. Let the differential "rest" until the air bubbles are gone.
❑
Press a second large bevel gear into the differential cup, making sure that the gears mesh with each other, then carefully place a gasket onto the differential cup
(C)
.
❑
Reinstall the ring gear (or centre spur gear) onto the differential cup, making sure to tighten the screws firmly
(D)
.
a
b
C
D
