TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 (67 and 68) and nuts (67) and remove bearing (71) with fan hub. (9) Separate fan hub from bearing (71). c. Replacement. (1) Install fan hub on bearing (71). (2) Install bearing (71) on fan mount frame (87) with bolts (66), washers (67 and 68) and nuts (69), (3) Install fan blades on fan hub using bolts (77) and washers (78). (4) Install fan guard (76) and secure with bolts (72), washers (73 and 74), and nuts (75). (5) Install key on bearing shaft (70) and slide fan sheaves (60) onto shaft. (6) Install fan belts (59) on fan sheave (60) and motor pulley (61). (7) Adjust fan motor mount (65) adjusting screw to provide about 1/2 inch belt play. Tighten adjusting screw. (8) Install belt guard (58) using screws (55), nuts (57), and washers (56). (9) Reconnect leads to fan motor (59). 7-7. RADIATOR REPLACEMENT, Code B.  Remove and replace radiator as follows: a. Removal. (1) If generator set has a housing kit installed, remove panels and shutter assembly in accordance with Chapter 15, (see figure 7-3). (2) Drain coolant from radiator, remove clamps (22, 29, 32, 6, 7 and 13) and disconnect hoses (25, 33, 12, 8 and 16). (3) Turn off all power and tag and disconnect electrical leads to fan motor (76). (4) Remove fan guard (68, figure 7-3) by removing hardware (69, 70, and 71). (5) With hoist attached by fan motor (76) taut, remove bolts, nuts and washers (47 thru 50) from top portion of support leg (72). (6) Carefully slide fan motor and fan blade out of unit. (7) Remove fan by taking out key (13, figure 7-4) out of keyway on shaft (31). (8) Remove motor stool (74) by removing screws (66) and nuts (67). (9) Remove cross beam (73) by removing hardware securing it to support legs (72). (10) Remove two support legs (72) by removing screws (47), washers (48 and 49), and nuts (50). WARNING The following steps involve removing parts that support the radiator and secure it to the skid base.  For safety, attach a taut hoist line to radiator before proceeding to prevent accidental tipping over of radiator when the radiator becomes free standing. (11) Remove two support tubes (41) by removing screws (38), washers (39) and nuts(40). (12) Remove fan cowl (65) by removing screws (42), washers (43) and nuts (44). Brackets (45 and 78) will also be removed as they are secured with the same hardware. (13) Remove screws (47), washers (48 and 49) and nuts (50) that secure radiator to skid base. 7-7