Guardian Technologies 4582 & 4987 Manual De Usuario

Page 49

measure  at  the  battery  terminals  during  cranking.  If  battery
voltage is below 11 volts DC, recharge/replace battery. If bat-
tery or cables are still suspected, connect an alternate battery
and cables to the generator and retest.

2. Use  a  battery  hydrometer  to  test  the  battery  for  (a)  state  of

charge and (b) condition. Follow the hydrometer manufacturer's
instructions carefully.

RESULTS:
1. Clean battery posts and cables as necessary. Make sure bat-

tery cables are tight.

2. Recharge the battery, if necessary.

3. Replace the battery, if necessary.

4. If battery is good, but engine will not crank, refer back to Flow

Charts.

PROCEDURE:
1. Set voltmeter to measure DC voltage.

2. Disconnect Wire 16 from the Starter Contactor located on the

Starter motor.

3. Connect  the  positive  meter  test  lead  to Wire  16  previous-

ly  removed.  Connect  the  negative  meter  test  lead  to  frame
Ground.

4. Place  the  Start-Run-Stop  Switch  to  Start.  12 VDC  should  be

measured.

5. Reconnect Wire 16 to the Starter Motor.

RESULTS:
Refer back to flow chart.

PROCEDURE:
1. Carefully  inspect  the  starter  motor  cable  that  runs  from  the

Battery  to  the  Starter  Motor.  Cable  connections  should  be
clean  and  tight.  If  connections  are  dirty  or  corroded,  remove
cable and clean cable terminals and studs. Replace any cable
that is defective or badly corroded. Set the voltmeter to mea-
sure  DC  voltage.  Connect  the  positive  (+)  meter  test  lead  to
the Starter Contactor stud that the battery cable is connected
to.  Connect  the  negative  (-)  meter  test  lead  to  a  clean  frame
ground. Battery voltage should be measured (see Figure 6-28,
STEP 1 TEST POINT).

CONNECTING 

DIAGRAM

BATTERY

12V

STARTER

SWITCH

PERMANENT MAGNET

30

50

16

STARTER

CONTACTOR

STARTER

MOTOR

TEST POINT

TEST POINT

2. Set the voltmeter to measure DC voltage. Connect the positive

(+) meter test lead to the Starter Contactor stud that has the
small jumper wire connected to the Starter. Connect the nega-
tive (-) meter test lead to a clean frame ground. Set the Start-
Stop  Switch  to  START.  Battery  voltage  should  be  measured
(see Figure 6-28,

STEP 2 TEST POINT).

RESULTS:
1. If battery voltage was not measured in Step 1, repeat Test 22.

2  If battery voltage was measured in Step 1, but not in Step 2,

replace the Starter Contactor.

4. If battery voltage was measured in Step 2 but the engine still

does not crank, refer back to the Flow Chart.

CONDITIONS AFFECTING STARTER MOTOR 
PERFORMANCE:
1. A binding or seizing condition in the Starter Motor bearings.

2. A shorted, open or grounded armature.

a. Shorted,  armature  (wire  insulation  worn  and 

wires touching one another). Will be indicated by 

low or no RPM.

b. Open  armature  (wire  broken)  will  be  indicated 

by low or no RPM and excessive current draw.

c. Grounded  armature  (wire  insulation  worn  and 

wire touching armature lamination or shaft). Will 

be  indicated  by  excessive  current  draw  or  no 

RPM.