Arb RD107 Manuel d'utilisateur télécharger pdf (Page 11)

3 Bench Measurement

3.1 Measurement for Pre-Load Shimming

When fitting an ARB Air Locker, a variable shim pack (supplied) is

used in conjunction with the original bearing on the right hand side of

the differential (as pictured in Fig.11.) in order to achieve the correct

ring and pinion backlash and carrier bearing pre-load once the Air

Locker has been installed. Because of this, the original shim from this

side will not be reused.

The original bearing type and shim type are used on the left hand (ring

gear) side of the Air Locker (as pictured in Fig.5.). Measurements will,

however, need to be taken to determine the correct shim thickness for

this side in order to reproduce a similar backlash and pre-load to that

of your existing differential.

The large spacer on the outside of the ring gear side shim must be

retained and re-fitted when the Air Locker is installed.

NOTE : Keep the shims separated so that they can be

identified as to which end of the differential they came

from.

c Secure the differential to a work bench.

c Remove the bolts that hold the ring gear in place.

c Using a plastic or copper hammer, tap in a circle around the ring

gear to separate it from the differential carrier.

c Remove the original bearings from the differential center using a

bearing puller.

c Using a caliper or similarly accurate measurement method

(i.e., able to take accurate measurements within 0.04mm [0.0015”]),

hold the bearing cup in place and measure the distance from the

shoulder of the bearing journal to the ring gear mounting face

(shown as ‘A’ in Figure 4.) and record this measurement as ‘A’.

c Measure the thickness of the shim (not the spacer) removed from

the ring gear side of the differential carrier (shown as ‘B’ in Figure

4.) and record this measurement as ‘B’.

c Measure the distance from the Air Locker bearing shoulder to the

ring gear mounting face (shown as ‘C’ in Figure 5.) and record this

measurement as ‘C’.

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Arb RD107 Manuel d'utilisateur Page 11