Click here to make tpub.com your Home Page

Page Title: STARTER AND SOLENOID TROUBLESHOOTING
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

TM 10-3930-638-24&P
3-10. STARTER AND SOLENOID TROUBLESHOOTING (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Probable
Inspection
Armature
Current
Speed
Draw
Data
cause
Zero
Zero
Check internal connections and field coils for open
Open field circuit.
condition.
Inspect commutator for badly burned bars after
Open armature coils.
disassembly.
Poor brush contact.
Check for broken brush springs, worn brushes,
and high insulation between commutator bars.
Zero
Grounded terminals or fields.
High
Disconnect field coil ground connections and check
for grounded condition.
Frozen bearings.
Rotate armature by prying pinion with a
screwdriver.
High internal resistance.
Low
Low
Check for poor connections, defective leads, and
dirty commutator.
High
Excessive friction.
Low
Check for tight, dirty, or worn bearings, bent
armature shaft or loose pole shoes allowing
armature to drag.
Shorted armature.
Check armature in a growler after disassembly.
Grounded field coils or
Disconnect field coil ground connections and check
armature.
for grounded condition.
High
High
Shorted field coils.
Replace field coils and repeat bench test.
2. STARTER FAILS TO CRANK
Step 1. Disconnect and tape field coil lead at solenoid M terminal.
Connect solenoid terminals to test set-up as shown.
Close switch, adjust carbon pile for 9 Vdc indication on
voltmeter, and note ammeter reading.
a. If ammeter indicates 6.5 to 7.0 amperes, proceed
to step 2.
b. If ammeter does not indicate 6.5 to 7.0 amperes,
replace solenoid switch (para 3-13).
Step 2. Reconnect solenoid terminals to pull-in winding test
set-up as shown on following page.
CAUTION
To prevent overheating solenoid, do not close switch for more
than 15 seconds at a time.
Close the switch and adjust carbon pile for 20 Vdc indication on voltmeter.
Note ammeter reading and open switch.

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business