SkyTrak 6036 Service Manual User Manual

Page 276

Section 10.

Electrical System

10-82

Model 6036 S/N 9B0499 and Before

Trouble

Probable Cause

Remedy

Reference

Cab Heater for Enclosed Cab—CAB HEATER SWITCH

Blower fan motor
doesn’t run.

See para. 10.4

See para. 10.12.1

See para. 10.12.2

1. Check circuit breaker.

2. Check continuity through

blower switch in high and
low positions.

3. Check motor and fan for

mechanical binding.

4. Open heater ground at

mechanical support.

Replace circuit breaker if
open.

Replace switch if defective.

Realign motor and fan as
required to relieve binding.

Check ground at mechanical
support for presence of tooth-
type washer.

Cab Heater for Enclosed Cab—HEATER FAN MOTOR AND COIL

Blower fan motor
doesn’t run.

1. Check circuit breaker.

2. Check motor and fan for

mechanical binding.

3. Check continuity through

blower switch in high and
low positions.

4. Open heater ground at

mechanical support.

Replace circuit breaker if
open.

Realign motor and fan as
required to relieve binding.

Replace switch if defective.

Check ground at mechanical
support for presence of tooth-
type washer.

See para. 10.4

See para. 10.12.2

See para. 10.12.1

See para. 10.12.2
and item 3, Fig.
10.67

Hydraulic Pump for Emergency Braking and Steering—GENERAL

Hydraulic pump
fails to operate
when engine oil
pressure is low.

1. Low oil pressure switch is

defective.

2. Circuit breaker is stuck in

open position.

3. Defective hydraulic pump

motor.

4. Hydraulic pump is

defective or “frozen”.

Refer to troubleshooting
instructions for oil pressure
switch.

Replace circuit breaker.

Repair or replace hydraulic
pump motor.

Repair or replace hydraulic
pump.

See para. 10.13.1

See para. 10.4

See para. 10.13.2
or 10.13.3

Hydraulic pump
operates when
engine oil
pressure is
normal.

1. Low oil pressure switch is

defective.

2. Short circuit in wiring.

Refer to troubleshooting
instructions for oil pressure
switch.

Remedy cause of short circuit.

See para. 10.13.1

See para. 10.3