TUBE AS 9V6691 - Caterpillar

Diesel engine exhaust contains products of combustion which may cause personal injury.Always start and operate the engine in a well ventilated area, and, if in an enclosed area, vent the exhaust to the outside.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
Drive the machine to a smooth, horizontal surface.
Illustration 1 g02867536
Move propel lever (1) to the NEUTRAL position.
Move parking brake switch (2) to the ON position.
Illustration 2 g02867537
Use throttle control switch (3) in order to operate the engine in ECO mode or in low idle. Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.
Illustration 3 g02867539
Move engine start switch (4) to the OFF position.
Illustration 4 g02867540
Slowly remove cap (5) from the hydraulic tank. Listen for escaping pressure. The cap is not vented.
Reinstall cap (5).
Illustration 5 g02867543
If there was pressure in the hydraulic tank, open the engine compartment. Replace breather (6).