CONNECTING RODS, PISTONS, RINGS & SLEEVES - CONT

CONNECTING RODS, PISTONS, RINGS & SLEEVES - CONT - TM-5-3820-256-24-5_241

CONNECTING RODS, PISTONS, RINGS & SLEEVES - CONT - TM-5-3820-256-24-5_243

TM-5-3820-256-24-5 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
Page Navigation
211

SERVICE MANUAL CONNECTING RODS, PISTONS, RINGS & SLEEVES Section 5 Figure 9. - Bearing Crush When the assembly is drawn up tight, the bearing is compressed, assuring a positive contact between the bearing back and bore as shown in Fig. 10. Figure 10. - Bearing Crush after Bolts are Torqued 3. To obtain correct "crush" torque bolts alternately and evenly to 1 55 N-m (11 5 Ibf-ft). 4. Main and Connecting Rod bearings are designed with the "spread" (width across the open ends) slightly larger than the diameter of the crankcase bore or connecting rod bore into which they are assembled as shown in Fig. 11. The width across the rod bearing not in place is approximatly 0.64 mm (0.025 in.) more than when the bearing is installed. This condition is originally designed into the bearing causing it to spread outward at the parting line when "crush" load is applied by torquing the bolts. Some "snap" may be lost in normal use, but the bearing need not be replaced because of a nominal loss of this condition. Figure 11. - Bearing Spread Illustration 5. Bearing spread causes the bearing to fit snugly which requires a force to seat it. CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 13

Privacy Statement
Press Release
Contact