SWITCH-PRESSURE 3836237 - Caterpillar

Type 1
Prepare the machine for maintenance. Refer to Operation and Maintenance Manual, "Prepare the Machine for Maintenance".
Illustration 1 g02042673
Machines that are equipped with the electric start use an electric motor on the automatic lubrication pump.
Illustration 2 g02042676
Machines that are equipped with the air start use an air motor on the automatic lubrication pump.
Remove plug (1) for the vent port if the reservoir is not equipped with a permanent vent.Note: If the reservoir is not properly vented, pressure will cause the wiper seal on the follower assembly inside the reservoir to fail when the reservoir is filled. Grease on the top side of the follower assembly may prevent the autolube system from functioning properly. Also, grease on the top side of the follower assembly may damage the autolube system.
Fill the autolube reservoir through fast fill port (2).
Fill the reservoir until grease appears at the outlet for the vent port.Note: Level indicator (3) can also be used to determine when the reservoir is full.Note: Refer to Operation and Maintenance Manual, Capacities (Refill) for the capacity of the autolube reservoir.
Install plug (1) in the vent port if the reservoir is not equipped with a permanent vent.The automatic lubrication reservoir provides lubrication for many components. There are five banks of injectors on the machine.If any of the remote lines become damaged, install a fitting in place of the remote line. Lubricate the item at the fittings until the remote line can be replaced.Type 2
Prepare the machine for maintenance. Refer to Operation and Maintenance Manual, "Prepare the Machine for Maintenance".
Illustration 3 g06274933
Place a suitable container under hose (2).
Remove the plug from port (1) and connect the filler hose.
Begin filling the automatic lubrication reservoir.
Indicator light (4) will illuminate when the reservoir is full. When the indicator light is illuminated, no more grease can be added to the reservoir. Stop the filling.Note: Indicator light (4) only indicates when the tank is full. For information on the tank level indicators refer to Operation and Maintenance Manual, Fast Fill Center.
Open valve (3) to relieve the pressure. Some grease may be purged through hose (2).Note: When relieving pressure, remove the plug from port (5) and hook up a gauge to check pressure of the system. Pressure must be below 1380 kPa (200 psi) in order for system to be filled at next service.
Close valve (3).
Remove the filler hose and reinstall the plug into port (1).
Remove the pressure gauge and reinstall the plug into port (5).Note: The filter is equipped with a bypass mechanism that will prevent the filter element from collapsing if the element is plugged. If not serviced, the system could reach the bypass pressure and dump grease out through the bypass hose which is located next to hose (2).