CHICAGO PUMP HBB - Recommended Torque Value of Fasteners; Parts List and Cross-Sectional Drawings

Instruction 2111.80B 04/05 16
placing impeller on shaft.
10. Adjust impeller (18) axially with set screws to have a clearance between impeller and suction cover
(24) of .005 to .010 inches. When the pump is in a vertical position, loosen cap screws (3) until
impeller rubs on suction cover, then tighten cap screws (3) 1/4 to 1/2 turn until the proper clearance is
reached. Cap screws should be alternately tightened in equal increments to assure satisfactory impeller
clearance. Tighten cap screws (37) to secure bearing retainer (36).
TABLE 4
Recommended Torque Values of
Fasteners in Foot-Pounds
LOW
CARBON
STEEL
304
ST'N STL
SILICON
BRONZE
316
ST'N STL
1/4-20 5.4 6.3 5.7 6.6
5/16 - 18 10.8 11.0 10.3 11.5
3/8 - 16 17.7 19.7 18.3 20.6
7/16-14 28.2 31.3 29.1 32.8
1 /2 - 13 38.8 43.1 40.0 45.2
9/16 - 12 51.1 56.8 52.7 59.4
5/8 - 11 83.3 92.5 85.8 96.7
3//4 - 10 104.9 127.5 118.0 131.8
7/8 - 9 159.9 194 178.3 202.5
BOLT/SIZE
1 " - 8 236.0 286.7 265.4 299.6