Losi LOSB0020 - Manual (Page 11)

Servicing the Differentials
The differentials should be serviced periodically. Be sure to clean and inspect all of the gears and replace
if severely worn. Always use plenty of high-quality grease (like Losi LOSA3066 or LOSA99203) on all gears.
NOTE: These can also be made into racing-type viscous diffs as noted below. Always service one diff at
a time and pay close attention to installing the housing with the “TOP” marking up so it can be seen
looking down on the chassis.
Removing the Differentials
• Remove the two screws in the bottom at the extreme end of the chassis (fig1).
• Remove the four screws in the bulkhead allowing the bumper/skidplates and pin mounts to be
removed (fig 2).
• Remove the diff retainers and slide the diff out (fig 3). NOTE: On the front end only you will have to
remove the lower front shock attachment screws and swing the shocks up and out of the way. On the
rear end you will need to “pop” off the rear camber links.
Differential Service
• Remove the three 5/64” cap head screws and the top of the differential housing, then the diff.
• Remove the four 5/64” flat head screws from the ring gear allowing it to be removed.
• Inspect the ring and pinion gears for wear; replace if necessary.
• Remove the cross shafts, bevel gears and shims for the carrier.
• Clean and inspect all parts; replace as needed.
• Check all ball bearings. Clean or replace as necessary.
• Remove pins from outdrives. Remove outdrives, regrease and reinstall.
• Lube all shafts and gears with LOSA3066 or LOSA99203 assembly grease
and reassemble.
• Load cross shafts with gears into the carrier with extra grease. Apply the
rubber gasket to the carrier and reinstall ring gear.
• Lube ring and pinion with grease and reassemble diff into diff housing.
• Reinstall into chassis with “TOP” on housing facing up.
For Viscous Differential
Instead of grease you can use silicone fluid in the
differential for a limited slip feel as desired for
racing. Simply fill the diff up to the top of the gears
before replacing the ring gear. (Be sure to reinstall
the gasket). You may have to replace the O-rings
on the outdrives at the same time you change to
this type of differential if the old ones are worn.
A popular silicone fluid for your model is Losi
10,000cs (LOSA5282) and is available from your
local hobby dealer.
Page 11
Fig 1. Fig 2. Fig 3.
IMPORTANT:
Always reinstall the
thin gasket.