TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Remove fan housing mounts lower into the cooling fan 1. Remove two bolts (A) and lock washers. 2. Remove two cap screws (B) and lock washers and shroud and takes the narrow lip cooling fan remove cooling fan vane from front fan housing. vane. Be sure the wide lip is not installed on the 3. Remove two bolts (C) and lock washers. front fan housing as this will interfere with the 4. Remove two cap screws (D) and lock washers and fan and cause damage to both fan and vane remove cooling fan vane from rear fan housing. housing. Install Note. When installing the cooling fan vanes, it 1. Position cooling fan vane in rear fan housing and install two cap screws (D) and lock washers. is important that the proper cooling fan vane is 2. Install two bolts (C) and lock washers. installed on the correct fan housing. The rear fan 3. Position cooling fan vane in front fan housing and housing (flywheel end) mounts noticeably higher install two cap screws (B) and lock washers. than the front fan housing and takes the wide lip 4. Install two bolts (A) and lock washers. cooling fan vane (item 3, fig. B-25). The front Figure 4-34. Removing or installing cooling fan vanes. Remove 1. Remove cotter pin, slotted nut (A), and flat washer. Discard cotter pin. 2. Remove front cooling fan and hub assembly (B) from vertical drive shaft. 3. Remove rear cooling fan and hub assembly (C) in the same manner. Install 1. Position front cooling fan and hub assembly (B) on vertical drive shaft. 2. Install flat washer, slotted nut (A), and new cotter pin securing fan and hub assembly. 3. Install rear cooling fan and hub assembly (C) in the same manner. Figure 4-35. Removing or installing cooling fans. 4-18