Loader Bobcat 773. Manual - part 74

ALTERNATOR (Cont’d)

Rotor Continuity Test

Touch the probes to the slip rings [A].

The ohmmeter should read between 3.065–33.85 ohms.

If there is no continuity replace the rotor.

Rotor Ground Test

Touch one probe to one of the slip rings and the other
probe to the rotor shaft [B].

There should be no continuity.

Replace the rotor if there is continuity.

Rectifier Continuity (Diode) Test

NOTE: In the diode tests there should be continuity

in one direction only. If the diode being
tested shows no continuity or continuity in
both directions, replace the rectifier
assembly.

Touch the probes to the terminals (Item 1) [C] of each
diode and read the meter.

Reverse the probes to check the diode in the other
direction.

There should be continuity in one direction only.

Touch one probe to the diode (Item 1) [D] and the other
probe to the connected heatsink and read the meter.

Reverse the probes to check the diode in the other
direction.

There should be continuity in one direction only.

A

P–01365

C

P–01373

1

1

1

D

P–01370

1

1

1

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773 BICS Loader

Service Manual

B

P–01378

ALTERNATOR (Cont’d)

Rectifier Continuity (Diode) Test (Cont’d)

Touch one probe to the diode (Item 1) [A] and the other
probe to the connected heatsink and read the meter.

Reverse the probes to check the diode in the other
direction.

There should be continuity in one direction only.

Assembly

Reverse the order of disassembly.

Do not assemble the rear case half.

Place the rotor in soft jaws when tightening the shaft nut.
Tighten to 50 ft.–lbs. (68 Nm) torque [B].

Install the rear case half and the remaining parts.

A

P–01390

1

1

1

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B

P–01808

STARTER

Removal And Installation

Stop the engine and open the rear door.

Remove the negative (–) and positive (+) cables from the
battery.

Remove the starter mounting bolt (Item 1) [A] and
disconnect the ground wires from the starter.

Remove the lower mounting bolt (Item 1) [B]. Remove the
negative (–) battery cables and frame ground cable from
the starter (Item 2) [B].

Disconnect the engine harness power wires and positive
(+) battery cable starter solenoid terminal (Item 3), [B].

Disconnect the white wire (Item 4) [B] from the S terminal
on the starter solenoid.

Remove the mounting bolt (Item 5) [B] from the starter.

Remove the starter from the engine.

Installation:  Tighten the three mounting bolts to 25–28
ft.–lbs.  (34–38 Nm) torque.

Reverse the removal procedure to install the starter.

STARTER (DELCO REMY)

Checking the Starter

The key switch must be in the OFF position.

The battery must be at full charge.

The cable connections on the battery must be clean and
tight.

Connect a jumper wire between S terminal and BAT
terminal [C].

If the starter turns but does not turn the engine, the starter
drive has a defect.

Connect a jumper wire between the M terminal and the
BAT terminal [D].

If the starter turns, the defect is in the solenoid.

If the starter does not turn, the starter is defective.

A

P–03879

1

C

A–01991

Cranking

Motor

Bat

S

M

D

A–01992

Cranking

Motor

Bat

S

M

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Service Manual

B

P–03875

5

4

3

1

2

D–02119

STARTER (DELCO REMY) (Cont’d)

Parts Identification

  1.

Screw

  2.

Solenoid

  3.

Bolt

  4.

Lever

  5.

Washer

  6.

Nut

  7.

Plug

  8.

Washer

  9.

Housing Drive

10.

Washer

11.

Bushing

12.

Ring

13.

Stop

14.

Drive

15.

Drive Support

16.

Support

17.

Drive Shaft

18.

Washer

19.

Washer

20.

Washer

21.

Screw

22.

Brush

23.

Frame Assy.

24.

Gasket

25.

Pin

26.

Armature Support

27.

Bolt

28.

Spacer

29.

Bearing

30.

Armature

31.

Bearing

32.

Spring

33.

Holder Assy.

34.

Brush

35.

Screw

36.

O–ring

37.

Frame

38.

Washer

39.

Screw

40.

Bolt

41.

Ring

1

2

3

4

5

6

10

11

12

13

14

15

16

17

18 20

19

26

25 24

27

23

22

21

21

22

28 29

30

31

32

35

34

34

33

36

37

40

38

39

41

7

8

9

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Service Manual