Mart Cyclone 30 Series, Installation, Operation And Maintenance Manual, Page: 318 / 322

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Table 5. Recommended Torque Values (except for impeller capscrew)
Bolt Size Material
Steel (or otherwise noted) 316 Stainless Steel
¼”-20 5 7
5/16”-18 11 12
3/8”-16 18 21
½”-13 39 45
5/8”-11 83 97
¾”-10 105 132
7/8”-9 160 203
1”-8 236 300
Torque the impeller cap-screw as shown below.
Impeller Cap Screw & Washer Torque Capscrew – ¼ turn
FIGURE 1: IMPELLER CAP-SCREW TORQUE METHOD
Follow these instructions for installation of the impeller cap-screw
1. Install the flange head capscrew with washer into the shaft. Hand-tighten the
screw until it is snug in the shaft and clamps the impeller washer tightly. Then,
tighten the capscrew ¼ turn (90°), approximately 80-90 ft-lbs.
2. To ensure proper seating, loosen the capscrew, re-snug and retighten the
capscrew ¼ turn (90°).
*
Use Loctite 262 Red when installing capscrew
*