Losi LOSB3594 - Manual

Thank you for purchasing the Losi ® ball differential. We
are confident that this ball differential will enhance the
performance of your Losi vehicle over the standard gear
differential. The ball differential comes prebuilt and ready to
drop into your vehicle. Read the instructions below in order
to understand installation, break-in, and maintenance.
Installation
1. Remove transmission from vehicle. Refer to the vehicle
manual for the correct procedure.
2. Remove old gear differential from transmission along
with aluminum spacers that house the gear diff bearings.
The aluminum bearing spacers will not be used with the
ball differential.
3. Insert new ball diff along with the included 10x15mm
bearings into the transmission case ensuring that the
diff adjustment screw is located on the left side of the
transmission case. By doing so, this will ensure easy diff
screw access for later adjustments.
Differential Break-in and Adjustment
Once the new ball differential is installed it will need to be
broken in. To do so, turn on the radio and the vehicle. While
holding the chassis with only the left side rear tire firmly on
the ground, give the vehicle about one quarter throttle, for
15 seconds. The right side rear tire should spin freely during
this time. Repeat this now with the right side rear tire held
firmly to the ground, allowing the left rear tire to spin. Feel
the differential action and tighten slightly, if necessary. The
differential should have a tight, thick feel when rotating it
after final adjustment. To check the tightness, hold the spur
gear and right rear tire, then try rotating the left rear tire
forward. It should be very difficult to turn the left rear tire. If
the tire turns easily, the diff is too loose. To tighten the diff,
line up the slot in the diff screw with the groove in the left
outdrive. Place the tip of a 1/16-inch Allen wrench through
both of the slots. This will lock the diff screw and outdrive
together. While holding the Allen wrench in place, turn the
right rear tire forward about 1/8 of a turn.
Slipper
Adjust the slipper once the differential is properly tightened.
Please remember your slipper will need slip before the
differential. The differential should NOT slip as that is what
the slipper is for. If the differential does slip it will severely
deteriorate the life of the diff balls, rings, and thrust
assembly. A slipping differential will have a growling/barking
sound during use. To test your slipper, with the vehicle on the
ground do a full punch off (applying full throttle quickly). The
slipper should slip for 1 to 2 feet when working properly. If
not adjust slipper accordingly.
Differential Rebuild Tips
After time the ball differential will become gritty or notchy
feeling. This means it is time for a rebuild. During rebuilds
use only Losi made parts that are listed in the parts list.
To fully rebuild your diff take the entire diff apart and lay
out the parts on a clean paper towel. It is recommended
to replace the T-nut (LOSB3599), diff balls (LOSA3002),
and thrust assembly (LOSB3598) for each diff rebuild. The
differential rings (LOSA3070) can be flipped over one time to
get an additional rebuild out of them. Higher quality carbide
differential balls (LOSA6951) can be used for this differential
resulting in multiple differential rebuilds out of a single set.
For the diff balls use Losi Silicone Diff Lube (LOSA3065) and
Losi Hi-Pressure Black Grease (LOSA99203) on the thrust
assembly. To ensure all metal parts are free of dirt and debris
always use Losi Nitrotec™ Motor spray (LOSA99217).
Replacement Parts List
Part Number Descriptionl
LOSA3009 Differential Balls 3/32" (12)
LOSA3065 Losi Diff Lube
LOSA3070 Diff Rings (2)
LOSA6907 5 x 8mm Bearings (2)
LOSA6943 10 x 15mm Sealed Ball Bearings (2)
LOSA6951 Carbide Diff Balls 3/32" (12)
LOSA99203 Hi-Pressure Black Grease, 8cc
LOSB3595 Ball Diff Outdrive Set: SL, HRL, SCT
LOSB3596 Ball Diff Screw, Spring & Nut: SL, HRL, SCT
LOSB3597 Ball Diff Gear, 46T: SL, HRL, SCT
LOSB3598 Ball Diff Thrust Assembly: SL, HRL, SCT
LOSB3599 Baff Diff Nut(2): SL, HRL, SCT
For Help, Trust the Experts
Losi, a division of Horizon Hobby, wants to ensure that
you get maximum enjoyment from your Losi purchase.
In addition to the service information available in this
instruction manual, our online Support - Answer Center
is available at WWW.LOSI.COM for performance tips and
troubleshooting questions. For live product support,
US residents may call 877-504-0233 toll-free Monday
through Friday.
Losi Ball Differential Instruction Manual
©2010 Losi, A division of Horizon Hobby, Inc.
Revised 12/09 17921.1
800-0401