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The PB Racing model car company produced the Mustang X3 quite some time ago and we have decided to republish the manual on-line as a reference. |
This will help both those who still have one of these cars as well any other modeller who is interested in cars from the past. |
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| Centre Drive With Differential |
Pack No. PB32B
In basic construction the centre differential is similar to the front and rear differentials but there are one or two additional features which require care in assembly. Please pre-grease all components before assembly.
Fit the pinion shafts (22/300) to the differential case end plate (43/109) and use the pinions themselves as a guide to keep the shafts perpendicular when you tap the pins into the end plate until about 1.5 to 2mm protrudes from the end of the pinion. |

Bigger Version |
| Now fit the special half shaft (43/232) which has a 6mm diameter shaft through the one-way roller clutch that is factory fitted to the differential end plate. The pinions should now be fitted to the shafts as shown. |

Bigger Version |
In order to properly withstand the end loads which will be imposed by the differential locking system it is ESSENTIAL to fit the 0.5mm thick thrust washer to the other half shaft (46/202) before fitting the shaft into the differential case (46/201).
See photographs. |
Completely fill the differential case with grease and fit it over the pinions previously fitted to the end plate.
Take care that the protruding ends of the pinion shafts locate in the holes provided in the differential case. Remove any excess grease and fit the hexagonal disk carrier (46/204) to the differential case using silicone sealer to seal the joint and two 4-40 UNC cap screws (22/228) to secure the assembly.
Fit the 50T ring gear to the differential flange as shown and trim off the small portions of the plastic lugs which protrude beyond the differential end plate. Secure the gear with four No.4 x 3/8" screws. |

Bigger Version |

Bigger Version |
Now fit the hexagonal driver (43/230) to the small half shaft using an M3 x 4mm grub screw (06/57). The differential locking mechanism may now be fitted as follows:-
Fit a steel disk to the hexagon (46/204), then fit the disk retainer (43/228) so that its large diameter contacts the disk. |
| Then fit four conical spring washers (Bellville washers) (22/331) taking care that they are fitted in the correct way - see photograph. The adjuster ring (42/231) should now be screwed on - the smaller (plain) diameter locates inside the last conical washer. |
The adjuster ring is drilled and tapped to accept a 3mm grub screw, this is to allow the adjuster to be locked in a position when adjusted. It is necessary to exercise considerable care when using this grub screw in order to prevent excessive damage to the adjuster thread -
do not over-tighten. |

Bigger Version |
| Further Information |
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