TM 5-6115-593-12 TO 35C2-3-463-1 adjustment bolt (see figure 4-28) to increase belt tension. NOTE All three belts should have same tension. If  not,  remove  and  replace  belts  as  a  set of three. (4) Replace guard (3), screws (1), and nuts (2). c. Fan Belt Replacement (Code A).  To remove fan belts proceed as follows: (1) Remove  two  halves  of  belt  guard  (3, figure  4-28)  by  removing  six  screws (1) and nuts (2). (2) Loosen   motor   mount   adjusting   bolt and relieve tension on belts.  Remove by manually rotating fan. 3) Install new belts, and adjust for proper tension. (4) Replace belt guard. d. Motor.  Inspect motor for loose mounting, signs of overheating, or other damage.  Run the generator set  and  determine  that  the  motor  is  operating  by observing   that   the   fan   is   rotating.      Check   for excessive noise. e. Sight Indicator and Valves.  (See figure 4-27) (1) Inspect   Code   B   sight   indicator   (38)   and Code   A   shut-off   valves   (28)   for   leakage, loose connection, or loose mounting. (2) Inspect sight indicator for cracking. f. Hoses. (1) Inspect all hoses (8, 12, 16, 24, 25, 27, and 33) for loose mounting or loose connections, leakage, cracking, or rot. (2) Replace hoses as follows: CAUTION Be   sure   engine   has   been   shut   down sufficiently  long  to  allow  engine  coolant to     cool     off     before     changing     hoses. Loosen and then remove radiator cap. (a) Drain   coolant   into   clean   container   using coolant  drain  cock  (see  figure  4-2).    Save coolant for reuse. (b) To  remove  hose  (8),  remove  clamps  (3,  4, 6,  and  7).    Remove  hose  (9)  from  radiator assembly. (c) To  remove  hose  (12),  unscrew  fittings  (11) from nipples (10). (d) To  remove  hose  (16),  remove  clamp  (13), unscrew fittings (15) from reducers (18). (e) To remove hose (24), remove clamps (22), then remove hose (24) from pipe connection (23). (f) To remove hose (25), remove clamps (22), then remove hose (25) from pipe connection (23) and then radiator assembly. (g) To    remove    overflow    hose    (27),    remove clamp (26), then remove hose from radiator assembly. (h) To  remove  hose  (33),  remove  clamps  (29 and   32),   then   unscrew   hose   from   fittings (34). (i) Install hose (33) by attach- ing hose (33) to fittings  (34).    Secure  with  clamps  (29  and 32). (j) Install overflow hose (27) by attaching hose (27)  to  radiator  assembly,  then  secure  with clamp (26). (k) Install hose (25) by attach- ing hose (25) to radiator  assembly,  then  to  pipe  connection (23).  Secure with clamps (22). 4-81