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RE: (ET) Trouble with batteries, speed control, and mower???
- Subject: RE: (ET) Trouble with batteries, speed control, and mower???
- From: "Elie, Larry (L.D.)" <lelie ford com>
- Date: Tue, 25 Jul 2000 11:05:26 -0400
- Sender: owner-elec-trak cosmos5 phy tufts edu
From: G McPherson [mailto:lifesmith hotmail com]
Sent: Tuesday, July 25, 2000 8:35 AM
To: elec-trak cosmos5 phy tufts edu
Subject: (ET) Trouble with battreis, speed control, and mower???
;1. The power pack appeared to be fully charged but when I checked the
;their specific gravity would range from 1125- 1175. The spread
;me a little but the low level concerned me more. No plates were exposed
;the electrolite was generally low. I charged it for a few hours with no
;appreciable change in the "fuel level" meter. When I started to use the
;tractor I noticed that it seemed listless and under powered the fuel
;meter immediately "full" to "low " and it seems to struggle under load.
;I stopped and checked for undue friction. However the wheels were free
;the brake was not dragging so put it on charge again and toped up the
;with distilled water. After a "6 to 10 " year" charge (7 hours) it only
;showed 85% full. I do not want to over charge the pack. But something
;seems amis. Are my batteries toast or just out of shape? Do I continue
;charge them or am I facing replacing them?
Try a trickle charger on either pairs (if it is 12V) or singles (for 6V)
HOURS until the reading with a DVM is within .2V each battery. Within 1V
even 1/2V is NOT that close in charge (a battery to first approximation is
non-linear integrator, but that's another story). Check the specific
to see if they are equal. I suspect they are not fully charged.
;2. The Speed Control lever would shift from forward to reverse normally
;would not accelerate to a higher speed at all just "on or off" All the
;graduated speed control had disappeared. Could this be related to the
;battery level or are there switch contacts that need to be cleaned?
No, it sounds like contacts or relays/contactors. Low batteries may let
back-up and not go forward, but I haven't seen this.
;3. When I inspected the mover I discovered that one of the blades was a
;little stiff and when I tried it under power the motor would heat up. Is
;this a lubrication issue (if so where do I lubricate?) or could the
;or bearing be worn or damaged? What are the possibilities and how should
Bearing replacement time. A little stiffness is ok as long as the
hold enough charge to let you mow your whole lawn; it is after all, taking
more current than it should. If it doesn't turn fast enough, or, if the
power use is too high, the bearings need to be replaced. I only use true
sealed (not just shielded) bearings.