Maintenance - Section 4 08/07 OM4016 Page 4-10 Lubrication and Service 250 HOURS SERVICE (continued) 6. HYDRAULIC TANK BREATHERS - Remove breathers, disassemble breathers remove filter ele- ment, clean in solvent. Dry with air pressure and reassemble then reinstall. 7. DIFFERENTIAL CASE - Check oil level. Use lube key "B". 8. DIFFERENTIAL CASE BREATHER - Remove breather. Wash to flush out the dirt from inside. Rein- stall after cleaning. 9. FINAL DRIVE CASE - Check oil level in R.H. and L.H. case. Use lube key B". 10. DRIVE SHAFTS - Inspect drive shafts for any abnormalities: loose joints, worn splines or bearings, unusual vibration of shaft. Refer to Section "F", Driv- elines and Adapter.
Notify the proper maintenance personnel, if any discrepancies are found. Use lube key "D" chart. 11. PARKING BRAKE - Measure brake pad for proper wear and thickness. Refer to Section "J", Brake System, "Brake Circuit Checkout And Adjust- ment", for proper inspection, procedures and tools. 12. CAB AIR FILTER (Outside) - Inspect and clean or replace filter element. Refer to Section "N", Filter Maintenance for procedure. (In extremely dusty con- ditions, more frequent maintenance may be required.) 13.
HEATER/AIR CONDITIONER FILTER The filter element is a wire mesh screen which can be removed by releasing latch (1), opening door (2) at the lower left corner of the heater/air conditioner cabinet in side the operator cab, and pulling screen (3) out toward center console (4). Check wire mesh screen and clean as necessary. Wash the screen with mild soap and water. Rinse completely and allow to air dry. COMMENTS CHECKED INITIALS