Factory Cat 29 Operator's Manual & Service Book - page 31
Models 29 & 35: Troubleshooting Guide
For each symptom, run through steps in order shown.
Electrical Problems
5.
Traction Circuit Runs Fine, And one or more, but not all of the Following Work
Properly: Vacuum Motor; Brush Motors.
Check each defective circuit as follows:
A.
Vacuum Motor.
1.
High Solution Tank Shutoff. There is a shutoff inside the tank so that when the
tank is full the motors will not blow solution out the top of the machine. The shutoff
uses a mechanical float switch. It can be accessed by removing the top of the
recovery tank.
2.
MicroSwitches. On electric squeegee lift machines, the vac motors shut off when
the squeegee is raised. The squeegee has two microswitches on it, one to turn the
vac on and the other to turn the vac off. Check these out. They are situated on the
squeegee's mounting bracket.
3.
Wiring from Central Command. Check continuity between the motors and the
Central Command's output to the vac motors.
.
Page 27
B.
Brush Motors.
Check first to be sure the problem is electrical. It is possible the plastic "clutchplate' on the
brush is damaged.
Note too that if there is too much pressure applied to the brushhead on an abrasive or dry
surface, the motors will not have enough power to start, and so will kick off the circuit
breaker inside Central Command. This will reset itself when power to the brushes is turned
off for more than 30 seconds. Just raise the brushhead.
Microswitch. There is a microswitch on the brushhead that turns the motors
on. It must be checked out. It is situated on the brushhead on the right hand
side.
Access it through the brush access door.
5.
Machine Works Well Otherwise, But Insufficient Tractive Power.
A.
Is operator used to the machine? Is it developing its normal power?
B.
Machine has lost most of its power--power loss came on very suddenly.
Batteries are down. Central Command will automatically reduce available
power when battery voltage drops below 18 to 20 volts. Recharge Immediately.