There are now seven DBZ locos back in service. It is planned to swap out the DFZ locos at Albany with DBZ class over the Anzac long weekend.
At Chullora Bogie Maint Centre we used to have a row of six cradles to sit the wheel sets on . We used to bring a set of traction motors in via overhead crane and fit one half of the split suspension bearings into it . The other halves went into the keeps or outer halves . The motors were lifted into place and the keeps mounted up with four long through bolts . The axle then supported the motor .
The keeps had oil wells in them and into these went the wick pads on spring loaded plates , the suspension bearings had windows through them so the pre soaked wick pad wiped directly on the axle journal .
Then the two piece , upper plus lower , gear cases were fitted with cotton seals and silicon sealant and partly filled with tubes of crater grease .
The quickest easiest ones to do were the Mk2 80 class and 85s 86s . These used roller bearings in tunnels that bolted directly to the traction motors . 442 Mitsubishis may have had them as well , was doing this 25 years ago so details escape .
46s were the most awkward , messy hand tied wicks and huge ungainly motors .
I imagine that plain journal bearings, the shaft could be repaired for scoring or wear between the axles without pushing the wheels off? With roller bearings the wheels would have to come off for a bearing replacement. Or is that not a big deal to push the wheels off? I cant see split race bearings being in there.
Did this kind of work happen in a clean part of the shop?
As a lathe operator I would prefer a shaft without wheels on it so maybe its a non issue.
Are these weapons defective or old or just not required ?
Why the scrapping ?
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