Posted by Arthur (in NY) on Sunday, November 13, 2005 at 9:48AM :
In Reply to: M37 24 volt starter. posted by Robert N on Sunday, November 13, 2005 at 7:42AM :
This is a recording:
1. Check batteries for water. Batteries older than 5 years should probably be replaced.
2. Measure battery voltage with engine off. Measure battery voltage with engine running.
Use a digital volt-meter.
Off = 12.2 volts Running = 13.8 volts (or more), per battery.
Reminder: it is nominally (which means "in name only") a 24-volt system. Technically, it is a 28-volt system. If you don't have 28 volts getting into the batteries, they will not charge adequately.
3. Check, clean thoroughly, (with wire brush) and tighten all electrical connections: Battery posts (all 4) starter, solenoid, engine and frame grounds.
4. Perform a starter current-draw test.
Most decent repair shops have a tester to do this. Takes a minute or two.
It is extremely unadvisable (and totally unnecessary) to change to a lower-voltage starter.
Keep us posted, as you proceed through these steps, and we will be happy to help you further.
APB, OTCPG
(Old Telephone Company Power Guy)
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