SEAL-O-RING 4Z8658 - Caterpillar

Fan Speed Switch (85) - Use the fan speed switch in order to control the speed of the blower fan. The fan speed switch has five positions, OFF position, FIRST speed, SECOND speed, THIRD speed, and FOURTH speed. Turn the fan speed switch clockwise in order to increase blower fan speed. Turn the fan speed switch counterclockwise in order to decrease blower fan speed. Turn the fan speed switch fully counterclockwise in order to turn the blower fan to the OFF position. The air conditioning and heating system can perform four functions:Heating - Turn temperature control (84) clockwise in order to increase the temperature. Turn fan speed switch (85) clockwise in order to obtain FIRST speed, SECOND speed, THIRD speed, or FOURTH speed.Cooling - Turn temperature control (84) counterclockwise in order to decrease the temperature. Move air conditioner switch (83) to the ON position. Turn fan speed switch (85) clockwise in order to obtain FIRST speed, SECOND speed, THIRD speed, or FOURTH speed.Pressurizing - Move air conditioner switch (83) to the OFF position. Turn temperature control (84) to the desired temperature. Turn fan speed switch (85) clockwise in order to obtain FIRST speed, SECOND speed, THIRD speed, or FOURTH speed. The speed of the blower fan depends on the volume of air that is needed in order to keep out the dust. Pressure inside the operator station will help keep out the dust when heating or cooling is not desired.Defogging - Move air conditioner switch (83) to the ON position. Turn temperature control (84) clockwise to the maximum heat position. Turn fan speed switch (85) clockwise in order to obtain FIRST speed, SECOND speed, THIRD speed, or FOURTH speed. The speed of the blower fan depends on the volume of air necessary to remove moisture from the air in the operator station. Once the windows are free from moisture, adjust temperature control (84) to the desired temperature. Adjusting the Cab Louvers
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Four louvers are located on the heater and air conditioning unit.Louvers - Adjust the louvers in order to circulate air in the cab. Adjustments are rotating clockwise or counterclockwise and adjusting from top to the bottom.Window Wiper and Washer Control (27)
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Front Window Wiper and Washer Switch (86) - Turn the knob clockwise to turn on the front window wiper. Push the knob to activate the window washer. Spring force will return the knob when released.
Side Window Wiper and Washer Switch (87) - Turn the knob clockwise to turn on the side window wiper. Push the knob to activate the window washer. Spring force will return the knob when released.
Rear Window Wiper and Washer Switch (88) - Turn the knob clockwise to turn on the rear window wiper. Push the knob to activate the window washer. Spring force will return the knob when released.
Wiper Mode Switch (89) - Turn knob (89) to the LEFT position (90) and press switch (92) to turn on the front, side, and rear window wipers. Turn knob (89) to the RIGHT