Cat SX2 layshaft/slipper very loose

[chickentikka25]

Hi guys,

This is driving me nuts so can I ask for some help from SX2 owners please??

I've just built a new SX2, which came with the upgraded metal layshaft kit (in the box, from Schumacher) which has a slightly different assembly method to the manual, and in fact the instructions came as an addendum to the manual.

When I first built it the slipper assembly wasn't holding itself together until I fitted the other side of the housing, installed bearings etc at which point it's fine, no play, no broken parts, turns the belts freely when turning by hand etc. I'm not missing any parts from the slipper either.

I've tightened the slipper to the max, (ie spring fully compressed), but under load (from a 10.5 with partial throttle) there's masses of slip - as in, car moves but would burn itself out if I ran it for too long.

Before I take it apart again, has anyone got any tips from building one of these? It's been built exactly as per the addendum, and I'm not new to these, it just seems as though I'm missing a step/large dollop of glue(!) somewhere.

Any ideas??

Thanks....

[bigred5765]

as long as the screw on the slipper side is tightened up real tight before you assemble the slipper shaft Assembly and build as per instructions it will be fine no need to over tighten the slipper spring (full compressed is wrong)make sure its not the diffs slipping and if problems still persist post close up pics and or explain how you built it IE step buy step

[Getpip]

Is this the version that uses pinion gears on layshaft?
It isn't possible to preassemble the slipper assembly with this arrangement if I remember correctly.
Check to make sure the back slipper plate is properly seated, the little square engaged in the square on the shaft and that you have the various spacers installed in the correct order.

[bigred5765]

Originally Posted by Getpip

Is this the version that uses pinion gears on layshaft?
It isn't possible to preassemble the slipper assembly with this arrangement if I remember correctly.
Check to make sure the back slipper plate is properly seated, the little square engaged in the square on the shaft and that you have the various pacers installed in the correct order.

it is possible you build it with the layshaft removed then slot it fully assembled back in the car make sure u dont forget the spacer

[Getpip]

Originally Posted by bigred5765

it is possible you build it with the layshaft removed then slot it fully assembled back in the car make sure u dont forget the spacer

Yes but the rear plate is not fixed and remains loose until it is tightened against the front plate from the other end of the shaft by the m3 nut behind the pinion. (So all you can actually assemble is the slipper spring and front plate)
This is only true of the late model cars that use pinion gears in the gearbox.

[bigred5765]

thats been like that on all sx models only difference is bearing to support spur gear and metal cogs on sx3
ill do a vid to show you it can be done

[Getpip]

Originally Posted by bigred5765

thats been like that on all sx models only difference is bearing to support spur gear and metal cogs on sx3
ill do a vid to show you it can be done

Ah ok, but I thought the earlier cars used conventional gears and that the slipper was mounted with the adjustment on the gear side.
The SX3 is slightly different, than my SX2 at least, in that the slipper assembly can indeed be pre-assembled.
Nevertheless on my SX2 I have always found it easiest to assemble the shaft with just the back slipper plate mounted as it is easier to fit the shaft whilst keeping the plate correctly seated.
One can then fit the spur, pads and front plate with it all in situ. If I try to do it with the spring fitted it pushes the back plate away and stops it seating correctly. (Which is what I fear may be happening to Mr Tikka)