Show Posts
76
Generators / ST head prep
« on: April 26, 2007, 12:51:23 AM »
I don't think anyone ever started a thread on how to srip clean and service and ST head.
Right out of the crate my ST head required a little massage, and I'm still waiting for the replacement end bell from ALTPRO.
So far I've stripped it down and cleaned it. I light wash of the stator with a soft bristle brush with some Xylene and a good soaking with cans of Glyopal 1201A. I noticed a bristle from a brush gummed to the nuckle on the connection end of the stator. This confirms my theory that "Jinlong" ( or what ever the name ) aplied some air dry varnish rather than dipped. Some varnish on one of the lead wires, is tough but flexable so I guess the quality is ok. Once I aplied the first can and let it soak warmed the stator up with 10 amps threw the main winding with a variac. Noticed some wigle in the coil ( buzz ) but after the secons soaking this disapeared as the glyptal was drawn into the stator core and windings by heat and vibration.
Never let the core get to hot to touch of you do this!
Never pour spray anything into an energized winding!
Will provide a picture of the scares on my arm too drive home the point about working on live/near live windings.
Other materials:
Mylar slot liner.
Glass tape for coil seperation.
Glass sleaving ( and rubberized sleave for connections threw to the dog house )
Bambo slot wedges ( kinda cool, don't see much of that around here lol )
Real cheap solder joints. I'd say they were heat fused rather than silver soldered as I used to do.
Bearings are open type and a little rough to the touch, might be dirt or they could be damaged and or junk....
Maching and castings are unspectacular but better than Rajkot on a good day. Gross weight of the head is a light 178 pounds. Castings are thin but free of defects. A little fugly around the feet but I need to remove more paint in that area.
Pictures to come when I have time.....
Right out of the crate my ST head required a little massage, and I'm still waiting for the replacement end bell from ALTPRO.
So far I've stripped it down and cleaned it. I light wash of the stator with a soft bristle brush with some Xylene and a good soaking with cans of Glyopal 1201A. I noticed a bristle from a brush gummed to the nuckle on the connection end of the stator. This confirms my theory that "Jinlong" ( or what ever the name ) aplied some air dry varnish rather than dipped. Some varnish on one of the lead wires, is tough but flexable so I guess the quality is ok. Once I aplied the first can and let it soak warmed the stator up with 10 amps threw the main winding with a variac. Noticed some wigle in the coil ( buzz ) but after the secons soaking this disapeared as the glyptal was drawn into the stator core and windings by heat and vibration.
Never let the core get to hot to touch of you do this!
Never pour spray anything into an energized winding!
Will provide a picture of the scares on my arm too drive home the point about working on live/near live windings.
Other materials:
Mylar slot liner.
Glass tape for coil seperation.
Glass sleaving ( and rubberized sleave for connections threw to the dog house )
Bambo slot wedges ( kinda cool, don't see much of that around here lol )
Real cheap solder joints. I'd say they were heat fused rather than silver soldered as I used to do.
Bearings are open type and a little rough to the touch, might be dirt or they could be damaged and or junk....
Maching and castings are unspectacular but better than Rajkot on a good day. Gross weight of the head is a light 178 pounds. Castings are thin but free of defects. A little fugly around the feet but I need to remove more paint in that area.
Pictures to come when I have time.....