BYPASS GP-FILTER 9T4945 - Caterpillar

Service the air cleaner only with the engine stopped. Engine damage could result.
Illustration 1 g00587441
The engine filter element indicator (1) for the tractor is located on the front of the hydraulic oil reservoir. Use a towel to remove the dust which has collected on the indicator.Examine the indicator. The machine may be operated when the indicator is yellow. The machine should not be operated when the indicator is red. The air cleaner will need to be cleaned or the air cleaner will need to be replaced.Once the air cleaner has been checked, the indicator should be reset. Push in on the bottom of the indicator (2). The indicator will return to the yellow color.Note: See the Operation and Maintenance Manual, "Engine Air Filter Primary Element - Clean/Replace". See the Operation and Maintenance Manual, "Engine Air Filter Secondary Element - Replace".