TM 10-4320-344-24
Table 3-1.
Direct Support Troubleshooting Table.
(Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. NO OR LOW SUCTION OR DISCHARGE PRESSURE. (Continued)
Step 5.
a .
b .
Step 6.
a .
b .
AC
Step 7.
a.
b.
Step 8.
a .
b .
Step 9.
a .
b .
Step 10.
a.
b.
Step 11.
a.
b .
Disconnect governor control box from governor (paragraph 3.8.6).
Using
multimeter set to 200 ohm scale, check continuity from A to A and C to
c .
(Model 609-A)
If reading is more than 1 ohm replace governor control box (paragraph
3 . 8 . 6 ) .
If reading is 1 ohm or less go to step 6.
Remove cover from governor control box.
Place jumper between TP1 and
TP2 .
Turn
vdc scale,
connector.
If reading
If reading
3 . 8 . 6 ) .
power switch to ON position.
Using multimeter set to 20
measure voltage between pins A and B on the three pin
(Model 609-A)
is 9.6 vdc go to step 7.
is not 9.6 vdc replace governor control box (paragraph
input impedance of meter must be 5,000 ohms per volt or greater.
Disconnect 10 pin connector from governor control box.
Using
multimeter, measure AC voltage between pins I and J while cranking
motor.
(Model 609-A)
If reading is 1.5 volts go to step 11.
If reading is not 1.5 volts go to step 8.
Turn power switch to OFF position.
Using multimeter set to 200 ohm
scale, check pins C and J on 10 pin connector that could cause pin J to
be grounded.
(Model 609-A)
If reading is 1 ohm or less repair or replace wiring as necessary
(paragraph 2.17).
If reading is more than 1 ohm, go to step 9.
Using multimeter set to 200 ohm scale, check continuity between C and
D, C and E, C and G, and C and H on 10 pin connector.
(Model 609-A)
If reading is 1 ohm or less repair or replace wiring as necessary
(paragraph 2.17).
If reading is more than 1 ohm go to step 10.
Using multimeter, check governor control box connector for shorts
between C and D, C and E, C and G, C and H, and C and J.
(Model 609-A)
If reading is 1 ohm or less replace governor control box (paragraph
3 . 8 . 6 ) .
If reading is more than 1 ohm go to step 11.
Using multimeter set to 200 ohm scale, check leads I and J from 10 pin
connector to magnetic pick-up unit.
(Model 609-A)
If reading is 1 ohm or less replace magnetic pick-up unit (paragraph
3 . 8 . 5 ).
If reading is more than 1 ohm repair or replace wiring as necessary
(paragraph 2.17).
3-6
NOTE