MAINTENANCE e. Check and make sure the swing bearing seal is in good condition. It is normal to see the excessive grease come out of the seal. See Figure 4.35A. M. CHECKING SLEWING RING ATTACHING BOLTS FOR PROPER TORQUE Check the slewing ring bolts torque on a new ma- chine after the first 50 hours of engine operation. Then check every 500 hours. Check the slewing ring bolts for proper torque across each other and in sequence, see Figure 4.35B. If bolts are loose, remove one bolt at the time, clean it and apply locktite #262 and torque accordingly. See the following table for torque ref- erence. MAKE SURE SEAL IS IN GOOD CONDITION FIGURE 4.35A Unit :
Kgf•m (ft•lbs) BALL 4 SLEWING RING BOLTS N. OIL LEVEL IN SWING AND TRAVEL REDUC- TION UNITS Check the oil level on swing motor reduction unit and travel reduction units on a new machine after the first 50 hours of engine operation. Then check every 120 hours. See detailed instructions in 120 hour maintenance in this section (items B, C, and D). SK32004095 LOWER FRAME FIGURE 4.35B O. INSPECTING COUNTERWEIGHT ATTACHING BOLTS FOR PROPER TORQUE Check bolts and nuts for proper torque. See Fig- ure 4.35C. CAUTION Striking counterweight against obstruction may cause loosening of bolts. Check bolts for loosening after 50 hours the first time, and every 250 hours after that. Unit :
Kgf•m (ft•lbs) FIGURE 4.35C NOTE If a counterweight bolt is found loose, remove it, clean threads, apply loctite # 242 before installing it. SK210(LC)/SK250(LC)–VI Dynamic Acera OM, 09/00 Rev.2 4-35 MODEL LOCATION TORQUE SPECIFICATION SK210-VI SK210LC-VI Inner Race 57.5 ± 5.8 (415 ± 42) Outer Race 40.0 ± 4.0 (289 ± 29) SK250LC-VI SK250NLC-VI Inner Race 57.5 ± 5.8 (415 ± 42) Outer Race 50.0 ± 5.0 (361 ± 36) MODEL TORQUE SPECIFICATION (Apply Loctite # 242) SK210(LC)–VI 130 +13 (939 +94) SK250(LC)–VI SK250NLC–VI 170 +15 (1228 +36)