Introduction: Hpi Savage Roto-start One-way Bearing Fix
seized one-way bearing ? this fix will help save you money and get your savage back in action again .
Step 1: Items Needed
tools needed :
2mm,2.5mm and 3mm hex drivers /allen keys
1/2" and 6mm sockets
and a hpi savage monster truck .
parts needed :
one way bearing (part no. HF0612) with a simple ebay search you should be able to get ten for ten bucks .
Step 2: Get to the Bearing .
first we need to get the engine out . to do this remove the throttle linkage off the carburetor , simply twist and it will pop off the ball stud. next remove the fuel tank which is held in place by two R clips .disconnect the fuel lines from carburetor and tuned pipe . then loosen set screw holding the tuned pipe .
Step 3: Flip It
flip your savage over . using a 3mm hex driver/allen key remove the four screws from the engine mount . unflip your savage and the engine should be able to pull right out .
Step 4: Remove the Pull or Rotostart
using a 2mm hexdriver remove the three screw holding the rotostart / pullstart to engine ,pull to remove exposing the one way bearing .slide bearing off to remove .
Step 5: Pressing Bearing Out of Nut .
place bearing in 1/2" socket. (note : use a 1/2 inch drive socket for this ) next using a socket withe the same or slightly smaller outside diameter as the bearing(i used a 6mm). press the bearing out of the holding nut using vice .
Step 6: Pressing New Bearing in .
place new bearing in freezer for ten or so minutes. hold holding nut in pliers, gently warm with heat gun . now remove cold bearing from freezer and press together .using pliers so as not to burn your fingers.
Step 7: Rebuild
rebuild your savage . follow steps in reverse order .
1 : remember that one way bearings are just that so if you put it in backwards it wont start, to test once rotostart backplate is on turn over engine . if it doesn't turn over ,flip the bearing 180 degrees.
2 :dont forget to mesh the clutch and spur gear with a piece of paper so it doesn't bind .
3: use treadlocker on any screws the go in to metal.
Step 8: Go Race
fuel up and go race .
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