PAN ASSEM. 9M3246 - Caterpillar

A motor that does not turn in freezing weather could be caused by water that has frozen inside the housing.
10. The Monarch® D.C. motor turns counterclockwise when viewed from the drive end. Check when replacing motor with new one.11. If motor fails to turn the pump, check the pump by turning drive shaft by hand. It may be locked up.Electrical Switches
Push button, toggle, rocker and manual motorstart switches.Defective switches are a common cause of electrical malfunctions. What seems to be a serious defect can often be caused simply by a faulty switch. Troubleshooting can be done by any one of three methods:1. Use a "continuity light" to test switch.2. Use a circuit "test light" to test switch.3. Remove the wires from the switch and "touch" them together in the proper order to operate the system.
All switch control stations subjected to the weather should be mounted so that the cord exits the bottom to prevent water from entering the box.
Motor start solenoid switches. When testing for a faulty solenoid switch use an Ohm meter, continuity light, or test light; and check all functions as described above. 3-Post solenoid Switch with case ground.
3-Post Solenoid Switch with case ground.
(1) '+' terminal. (2) Control circuit terminal. (3) Power cable terminal to D.C. motor.The three-post solenoid switch with case ground is wired and constructed as follows:* The large post (1) marked "Bat" must be attached to the cable leading from the battery.* The small post (2) connects to the control circuit. (Push button, rocker switch, or toggle, etc.).* The shared "Hot" lead from the control circuit must also be attached to the large post marked "Bat".* The remaining large post (3) attaches to the cable leading to the D.C. motor.Shorts, Grounding Faults, And Open Circuits
In control wiring, shorts can only occur when "hot" lines (lines connected directly to the battery) come in contact with ground. A short will either cause a fuse to blow, if there is one, or burn the wire off at its weakness point. Likely spots for shorts are switches, electrical strain reliefs, electrical junction boxes, or a control cord that has been pinched or cut.Grounding faults are much like shorts except they occur on the opposite side of the electrical component. (Valve solenoid or motor solenoid start switch). A "ground fault" will cause the coil in the motor solenoid or valve to remain energized. This type of failure can happen because switching is done in the ground wire due to construction of the motor solenoid switch. (See electrical switch section). Likely sports for "ground faults" are the same as shorts.An "open" circuit is simply a break which prohibits current flow. Likely spots for "open" circuits are the same as shorts.Solenoid Coils
Coils are used in solenoid operated valves and solenoid start switches. Failures can be caused by vibration, water, improper voltage, or corrosion. The best way to test a coil is with an ohm meter. The meter should read some value of Ohms. An infinite reading means that the coil