MAINTENANCE L. SLEWING RING AND SWING BEARING LUBRI- CATION. 1. Slewing Ring Check the grease level and condition of the slewing ring gear grease bath on a new machine after the first 50 hours of engine operation. Then check every 120 hours. Replace the grease in the slewing ring gear bath every 2,000 hours (See 2,000 hour maintenance in this section for details) a. Locate the slewing ring grease case inspec- tion cover between the battery compartment and the boom support frame. See Figure 4.34A. b. Remove bolts and inspection cover plate. If water is present, remove the lower plate (drain plate). See Figure 4.34B. c.
Start the engine and slowly rotate the upper structure to inspect the slewing gear. d. Should any grease be needed, add N.L.G.I. Nє 2 Lithium base with MOS 2 grease only. SWING MOTOR BATTERY COMPARTMENT FIGURE 4.34A 4 INSPECTION COVER CAUTION DO NOT OVERFILL SUMP BATH. IF OVERFILLED, SUMP BATH GREASE COULD BE PUMPED INTO SWING MOTOR REDUCTION UNIT AND CAUSE SEVERE DAMAGE. USE ONLY N.L.G.I. LITHIUM BASE WITH MOS2 GREASE IN SLEWING RING GEAR SUMP BATH. IF THE SLEWING RING EVER BECOMES SUBMERGED IN WA- TER, IT IS MANDATORY THAT THE SUMP BATH GREASE BE CHANGED. REFER TO 2,000 HOUR MAINTENANCE FOR SPE- CIFIC INSTRUCTIONS. SUMP BATH DRAIN PLATE SK32004128 FIGURE 4.34B 2.
Swing Bearing Lubrication Lubricate the swing bearing on a new machine after the first 50 hours of engine operation. Then lubricate every 500 hours, or as conditions dic- tate. a. Locate the grease fitting at the front of the swing bearing. See Figure 4.34C. b. Using a grease gun filled with general pur- pose EP Grease (Refer to page 4-8), lubri- cate swing bearing with several shots from grease gun. c. Swing machine 90 ° right, and repeat step 2. See label on frame. d. Continue to swing machine at 90 ° increments and lubricating swing bearing until ring has been completely greased. NOTE Make sure to inspect the Upper and Lower Side of Swivel Valve for leakage. Repair any leakage as needed.
. FIGURE 4.34C 4-34 SK210(LC)/SK250(LC)–VI Dynamic Acera OM, 09/00 Rev.2