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nt18t manual page07
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1.
2.
VERY IMPORTANT !
FACTORY PRE-ASSEMBLED
DIFFERENTIAL BREAK-IN AND
ADJUSTMENT:
The ball differentials in the NT18T comes
pre-built from the factory, but you must still perform
a proper break-in on them in order to have them perform
properly and give long life. The key is to gradually tighten the
diff to break it in properly and obtain the correct tightness. DO
NOT overtighten the diff initially or damage will result.
When breaking in the diff, the balls create a groove in the diff rings; this is normal and
essential for proper operation. If you overtighten the diff initially, the balls will mar the
surface of the rings (and damage the parts) instead of creating a proper groove in the rings.
Adjusting the differentials is easy to do. Tighten the diff until you feel some resistance; you
do not need to make large adjustments - 1/16 or 1/8 of a turn will make a noticeable
change in diff tightness.
Reassemble the truck, run it for a few minutes, and then tighten each diff a little bit.
Repeat this several times to break in the diff and set the correct tightness.
3.
ALIGN FLAT SPOTS
ALIGN FLAT
SPOTS
930020
B 2.4
930407
BB 4x7x2.5
907270
2.5x20
960025
N M2.5
930025
BA 2.5x0.8
930812
BB 8x12x3.5
