Losi LST XXL User Manual - Manual (Page 9)

Page 9
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)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 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. Popular
silicone fluid for your model is Losi 10,000cs (LOSA5282) and
is available from your local hobby dealer.
Fig 1. Fig 2. Fig 3.
IMPORTANT:
Always reinstall
the thin gasket.