Since my last thread re the 9513, I've done a little more work on the machine as time and funds have allowed. I recently replaced the bearings to eliminate an odd squeaking sound on spin which sounded a little like there was a trapped budgerigar in the drum somewhere xD. I bought Nachi Quest bearings for their known quality and [hopefully] longevity.
I also partially refurbished the speed module by replacing the 4 electrolytic capacitors present on the PCB. These are well known for drifting in value over time and throwing circuits out of spec, more specifically when operating near to their temperature limits. I felt sure that given the age of the machine, and the temperatures present inside the cabinet during a hot wash, that these would be in need of replacement by now. However, after performing the refurb, I checked the old caps with my multi-meter, and all of them were still well within spec; not bad, obviously Hotpoint used high quality components :). As a result I put them in my box of electronics for future use.
I also wanted to restore the inside of the cabinet as every single time I've been inside it, I'm witness to the grimy looking rust splatters on the chassis and rear panel. I've scrubbed, sanded and steamed the living crap out of it and still it remains. Also, the cracks where the suspension struts meet the chassis were beginning to reassert themselves (cheap epoxy failed), and were once again causing creaking during wash cycles. So I bought some metal epoxy putty, grey stone chip paint (usually reserved for road vehicles xD), and bitumen based sound deadening panels and began Stripping the machine down to the bare cabinet. The epoxy putty was used to brace the cracked metal work on the chassis; meanwhile after some further rust removal with wire wool, I sprayed the base and rear panel with the stone chip, and applied the bitumen pads to the sides and front. After reassembly, I put through a load of heavy towels and listened for rattles, creaks, squawking, banging, tapping.... Thankfully, it has [for now] done the trick, and the inside of the machine looks fresh and purposeful :).
Finally, given the worn state of the commutator in my motor, I obtained a 1000rpm version off a later model (WM22) with a newer connector type and transplanted the field coils and armature into my existing motor body. Thankfully, the connector pins are identical so it was fairly simple to remove and relocate them into the older style socket. I used an el cheapo laser tachometer to adjust the tumble speed to that suggested in the service manual, then took readings for all the various speeds. I can confirm that Hotpoint did seem to understate their spin speeds somewhat, with my original motor reaching 914rpm, and the replacement getting to a whopping 1138rpm! Nice :D.
Comes to the Rescue!
;){kind=link}
;){kind=link}