TM10-3930-660-20 7-8. ENGINE COOLING FAN GUARDS -   REPLACE  (Cont‘d) INSTALLATION 1. INSTALL RIGHT-HAND FAN GUARD (5). a. Through left-hand engine access door, position right-hand fan guard (5)  on  radiator  shroud  (6). b. Secure right-hand fan guard (5) to radiator shroud (6) with four flatwashers (4), four new lockwashers (3) and four screws (2) . 2. INSTALL LEFT-HAND FAN GUARD (1). a. Through left-hand engine access door, position left-hand fan guard (1)  on  radiator  shroud  (6). b. Secure left-hand fan guard (1) to radiator shroud (6) with four flatwashers (4), four new lockwashers (3) and four screws (2). c. Secure left-hand fan guard (1) to right-hand fan guard (5) with flatwasher (4), new lockwasher (3) and screw (2). 3. IF REMOVED, INSTALL STE/ICE PULSE TACHOMETER, PARA. 8-30. 7-23