Re as sem bling and In stalling the Bear ing Housing As sem bly
Fol low the pro ce dures de scribed be low when re as sem bling and in stall ing the bear ing hous ing as sem bly. Per -
form these pro ce dures in the or der in which they ap pear.
Pro ce dure 1: Parts In spec tion
Care fully in spect the pivot shaft be fore re as sem bling the bear ing hous ing as sem bly, pay ing close at ten tion to
the top of the pivot shaft and its quad ring seal ing sur face. The top of the pivot shaft must be free of burrs to
pre vent the quad ring from be ing dam aged dur ing as sem bly. Use Scotchbrite or sim i lar prod ucts to pol ish
small mars out of the quad-ring-seal ing sur face. If deep scratches re main, re place the pivot shaft.
Pro ce dure 2: Drive gear in stal la tion
Per form this pro ce dure only if you have re moved the drive gear from the cru ci ble mount ing flange.
Step 1.
Using the cor rect mount ing screws, loosely se cure the drive gear to the cru ci ble mount ing
flange, so that the gear can still be moved about slightly.
Step 2.
In sert the bear ing hous ing as sem bly into the hole in the cru ci ble mount ing flange and use the
outer sur face of the bear ing hous ing to cen ter the ring gear.
CAU TION
Take care to avoid jamming or scratching these parts during this
step, as the fit between the bearing housing and the crucible
mounting flange is very close.
Step 3.
Ro tate the bear ing hous ing un til its through-holes line up with the screws that se cure the
drive gear to the cru ci ble mount ing flange.
Step 4.
In sert the Allen driver through these holes and tighten these screws, as shown in Fig ure
5-18.
Source Disassembly
STIH-270-2PT
0101-9004-0A
5-18
Figure 5-18. Allen driver inserted through hole in the bearing housing
Bearing housing
Shaft of Allen tool
Crucible
mounting flange
