Loader Bobcat 773. Instruction - page 101

W–2004–1285

Check for correct function after adjustments,
repairs or service. Failure to make correct
repairs or adjustments can cause injury or
death.

BOBCAT INTERLOCK CONTROL SYSTEM (BICS

)

(Cont’d)

Troubleshooting Guide (Cont’d)

The following troubleshooting guide is provided for
assistance in locating and correcting BICS system
problems It is recommended that these procedures be
done by authorized Bobcat Service Personnel only.

SEAT SENSOR

Seat indicator light does not come ON with operator in seat..

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11

Seat indicator light stays ON when operator out of seat.

2, 3, 6, 10, 11, 12, 13, 14

Intermittent indicator light during operation.

11, 15, 16, 17, 18

1.

Check to make sure power indicator light is ON.

2.

Check for debris under and around seat.

3.

Look for any obstruction around seat.

4.

Check to make sure seat rail lowers when weight is in seat.

5.

Raise cab and check for magnet collar movement when weight is added to seat.
(Magnet collar should extend approximately 3/8’’ beyond the sensor assembly
with weight in the seat).

6.

Use sensor tester to check operation of sensor and controller. Follow instructions
on tester.

7.

Check to make sure the magnet guide pin is in place.

8.

Check for contamination on magnets such as metal particles or for shipping plate
over magnets.

9.

Check to make sure both magnets are in collar.

10.

Check for binding of magnet collar or bushing with hex head on other side for
binding.

11.

Check for correct mounting. One spring for standard seat. Two springs for
suspension seats. Thick washers should be under front seat mounting rails on
both sides.

12.

Check for loose hardware mounting magnet collar. Check to make sure the
magnet collar bushing is threaded on all the way so it is contacting seat rail.

13.

Check to make sure seat rail raises when weight is removed from the seat.

14.

Raise cab and check for magnet collar movement when weight is removed from
seat. (Magnet collar should extend approximately 1/8 inch beyond the sensor
assembly without weight in seat.)

15.

With smaller operators that operate with the seat forward some mounting
alterations may be required. (See solution suggestions 16, 17 and 18.)

16.

Adjust suspension seat to lightest weight setting.

17.

Check to make sure the seat rails move up and down freely when weight is added.

18.

Add washer between the bushing the magnet collar assembly slides on and the
seat rail. This will reduce the amount of seat travel required to activate the system.
Must check, with seat moved all the way back, that indicator light does not stay
on with operator out of seat. If light does not go out with operator out of the seat,
the washer must be removed.

PROBLEM

SOLUTION #

SOLUTION SUGGESTIONS

Revised Jan. 99

–8–10–

773 BICS Loader

Service Manual

W–2004–1285

Check for correct function after adjustments,
repairs or service. Failure to make correct
repairs or adjustments can cause injury or
death.

BOBCAT INTERLOCK CONTROL SYSTEM (BICS

)

(Cont’d)

Troubleshooting Guide (Cont’d)

The following troubleshooting guide is provided for
assistance in locating and correcting BICS system
problems. It is recommended that these procedures be
done by authorized Bobcat Service Personnel only.

SEAT BAR SENSOR

1.

Check controller power indicator light . It must be ON.

2.

Check sensor wire connection.

3.

Use the BICS sensor tester (MEL1428) to check sensor and controller.

4.

Check for loose hardware.

5.

Check keyed bushing to make sure magnet collar rotates with seat bar.

6.

Check magnet collar magnets for contamination such as metal particles.

PROBLEM

SOLUTION #

Indicator light does not come ON when seat bar is lowered.

1, 2, 3, 4, 5, 6

SOLUTION SUGGESTIONS

Revised Jan. 99

773 BICS Loader

–8–11–

Service Manual

SEAT SENSOR

Seat Sensor Test

Use Sensor Tester (MEL1428) for the following
procedure:

Disconnect the short adatper test leads if connected.

Revised Jan. 99

Raise the operator cab. (See Page 1–1.)

Disconnect the seat sensor connector (Item 1 – Inset)
[A].

Connect Sensor Tester (Item 2) [A] inline as shown to the
seat sensor.

Lower the operator cab. (See Page 1–1.)

Move the toggle switch (Item 1) [B] on the sensor tester
to the Absent position.

Turn the key to the ON position. DO NOT START THE
ENGINE
.

The power light (Item 2) [B] will illuminate, if the light is not
on, check the tester or wiring harness.

Sit on the operator seat.

The Sensor Test light (item 1) [C] should illuminate.

Get off the operator seat. The Sensor Test light (Item 1)
[C] should go off.

If the above tests fail, there is a problem with the seat
sensor.

Disconnect the Sensor Tester.

Replace the Seat Sensor. (See Page 8–13.)

If the above tests pass, run BICS

controller seat sensor

circuit test. (See Page 8–14.)

NOTE: Clean any debris, dirt or objects from under

or behind the operator seat before starting
the test. The rear of the seat must move up
and down.

B

P–04698

2

1

C

P–04699

1

A

P–04705

2

1

N–00960

–8–12–

773 BICS Loader

Service Manual

SEAT SENSOR (Cont’d)

Removal And Installation

Raise the loader operator cab. (See Page 1–1.)

Locate the seat sensor (Item 1) [A] beneath the operator
cab.

Remove the sensor connector (Item 1) [B] from the
holder and disconnect from the harness.

Remove the magnet collar mounting bolt (Item 2) [B] and
washer (Item 1) [C].

Installation: Tighten the bolt to 180–200 in.–lbs. (21–23
Nm) torque.

NOTE: Be sure not to lose the magnet collar

alignment pin (Item 4) [C] which is located in
the sensor (Item 3) [C] when removing the
sensor.

Remove the threaded bushing (Item 5) [C] from the seat
track mounting bolt (Item 1) [D].

Inspect all parts for damage and wear and replace if
necessary.

Reverse the removal procedure to install the seat sensor.

Remove the magnet (Item 2) [C] from the sensor (Item 3)
[B].

Installation: If the magnet collar (Item 2) [C] is tapered,
install the tapered end to the seat. If the magnet collar
(Item 2) [C] is not tapered, install as shown [C].

Remove the sensor mounting bolt (Item 4) [B] and nut.

Installation: Tighten the nut and bolt (Item 4) [B] until
light pressure is applied to the sensor (Item 3) [B].

Remove the sensor (Item 3) [C].

Be careful to not overtighten the sensor
mounting bolt and nut to prevent breakage of
the sensor.

I–2088–1095

DO NOT overtighten the magnet mounting
bolt to prevent damage to the magnet.

I–2089–1095

Revised Jan. 99

A

P–03987

1

C

P–04041

2

1

3

5

4

D

P–04044

1

773 BICS Loader

–8–13–

Service Manual

B

N–00960

2

3

4

1

Рассказать друзьям