fpm

Note: Troubleshooting chart is to be used in conjunction with wiring schematic for the truck.

7.1 Dead Truck

7.11 Emergency disconnect contactor will not close.

7.111 Conditions for test: Battery plugged, battery fully charged, key switch in start position.

Check for battery voltage at:

1.

2. Negative 0 volts, fuse 3 side for fuse 3 repair open wiring from battery to

Positive side of fuse 3 0 volts, replace fuse 3

3.

4. Positive side of key switch 0 volts - repair open wiring from fuse 3 to key switch -

Negative of key switch (start position) 0 volts - replace key switch

Positive side of contactor coil 0 volts - repair open wiring for key switch to contactor coil

Negative of contactor coil 0 volts, replace contactor coil, check for mechanical binding of contactor Battery volts - repair open wiring from con- tactor coil to battery negative

7.12 Bmergency disconnect contactor closes, but drops out when key switch is returned to run position.

7.121 Condition for test: Battery plugged in, key switch in run position.

Check for battery volts at:

1. Negative side of key switch 0 volts, replace key switch

2. Positive of emergency disconnect push button 0 volts, repair open wiring from key switch to disconnect push button

3. Negative side of emergency disconnect push button 0 volts, replace push button

5.

6.

4. Positive side of emergency disconnect interlock switch 0 volts, repair open wiring from push button to interlock switch

Battery volts, turn key switch to start posi- tion, check interlock switch for proper mecha- nical operation

5. Disconnect wire #ll from negative side of interlock switch with key switch in start position and contactor closed, check for bat- tery voltage at this terminal. 0 volts, eplace interlock switch.

7.21 No lift

7.21 Condition for test: battery plugged in key switch in run position, emergency disconnect contactor closed, foot pedal switch closed, platform gates. switched closed.) lift switch activated to lift.

Check for battery voltage at:

1. Positive side of foot switch 0 volts, repair open wiring from emergency disconnect push button positive side

2. Negative side of foot switch 0 volts, replace foot switch

3* Positive side of platform gate switch wire 835 0 volts, repair open wiring from foot switch to gate switch

4 Negative of gate switch 0 volts, replace gate switch

5 Positive side of second gate switch wire #20 0 volts, repair open wiring from first gate switch to second gate switch

6. Negative side of second gate switch 0 volts, replace second gate switch

7 Positive side of lift switch 0 volts repair open wiring from second gate switch to lift switch

8. Negative side of lift switch 0 volts, replace lift switch

9. Positive of liftpump contactor coil 0 volts, repair open wiring from lift switch to contactor coil

7.2 Lift

10. Negative side of contactor coil 0 volts, check contactor for mechanical binding, replace contactor coil Battery volts, repair open wiring to battery negative .

7.22 No high speed lift, low speed lift okay

7.221 Condition for test: Battery plugged in, emergency disconnect contactor closed, key switch in run position, foot pedal switch closed, gate switches closed, lift activated for high speed lift, lift platform raised minimum of 4 inches.

Check for battery voltage at:

1. Positive side of platform lift chain tension switch 0 volts, repair open wiring from gate switch to platform chain tension switch

2. .Negat:ive

0 volts, of platform chain .tension switch replace-chain tension switch _.

3. Positive side of staging chain tension switch 0 volts, repair open wiring

4. Negative side of staging chain tension switch 0 volts, replace staging chain tension switch

5. Positive side of high speed lift switch 0 volts, repair open wiring from staging chain tension switch to high speed lift switch

6. Negative side of high speed lift switch 0 volts, replace high speed lift swjtch

7. Positive of lift pump valve coil 0 volts, repair open wiring from high speed lift switch to lift pump valve coil

8. Negative side of lift pump valve coil 0 volts, replace valve coil

Battery volts, repair open wire to battery negative

7.3 Steering

7.31 Steering pump will not run, lift okay.

7-311 Condition for test: Battery plugged in, key switch in run position, emergency disconnect con- tactor closed.