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706 starter revisited

A

Anonymous-0

Well-known Member
An update on my 706 starter. I took it apart and cleaned thoroughly with electric motor cleaner. I loosened the contact stud on the solenoid, turned it, and re-tightened. Still no luck.
The brushes look to have a lot of life left. The commutator is making good contact with the brushes.
When I short across the solenoid, the starter head pops out but the gear will not turn.
Anything else to try before taking to a starter rebuild shop?
Thanks.
 
Do the brush springs seem to have enough pressure to keep the brushes tight on the commutator? Can you turn the armature by hand? Are the brush lugs tight where the screw goes through them?
 
Jumping the terminals at the starter shows that the pull in winding is good but that still does not check for the switch energizing the starter. You need to jump across the battery cable stud to the stud going into the starter. That will test whether the problem is in the solenoid or in the starter. If the battery cable stud has already been turned once then your turning it again would not have corrected the problem
 
Rtkman.Heck of a lot of tension on the brush holder spring assembly. I would pull the starter apart and check the armature with a volt ohm meter to see if there is a section (or sections) that are Dead. Ground the volt ohm meter (ground clip it to the end of the steel shaft side.Rum the other VOM Hot around the armature ,watching to make sure there is NO CONTINUITY SHOWING ON THE GAUGE. if there is, good by armature assembly. Son is sending a service bulletin to help.Regards,LOU
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sure seems like the hold in winding on solenoid. buy a solenoid and problem should be fixed.
 
Success,
I took it apart (again), pulled the solenoid cap off and rotated bolt to have good contact, also emery clothed the washer, checked the brushes and noticed they were only making half contact so I used a die grinder to shape the brush to fit the commutator better. Then put it all back together and it whirled away.
I"m not sure what the fix was but it spins my 282 like never before. Thanks for all the input.
 
(quoted from post at 10:41:13 02/27/11) sure seems like the hold in winding on solenoid. buy a solenoid and problem should be fixed.
Click to expand...

A bad hold in winding will not keep the starter motor from engaging. The pull in winding and the hold in winding work together to pull the plunger into the solenoid. Once contact has been made between the battery stud and the motor stud the voltage is the same on both ends of the pull in winding so it will no longer act as magnet.

What will happen if the hold in winding is bad is when contact is made and the pull in winding drops out, the spring will push the plunger out which will disengage the contacts so the pull in winding will again pull the plunger back in to engage the contacts. You will hear the starter chattering but if it spins it will not have enough power to crank the engine.

On the other hand, most likely a new solenoid would cure the problems he has.
 
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