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TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download

Page 134 of 953

CAUTION To ensure proper cooling of engine, upper edge of shroud must align with radiator top tank seam or damage to equipment may result. 1. Install fan shroud (16) to radiator (6) so fan shroud edge (17) aligns with tank seam (18) and secure with two retaining strips (15), eight washers (14), and capscrews (13). Tighten capscrews (13) to 6 lb-ft (8 N•m). 2. Install two support brackets (4) and insulators (5) to radiator (6) with two large washers (3), washers (2), and locknuts (1). Tighten locknuts (1) to 20 lb-ft (27 N•m). 3. Align radiator (6) to frame bracket (10), and align rear support brackets (4) to airlift brackets (22). 4. Install rear support brackets (4) to airlift brackets (22) with four capscrews (25), washers (24), and locknuts (23). Do not tighten locknuts (23). 5. Install radiator (6) and mount (9) on frame bracket (10) with large washer (11), washer (8), capscrew (12), washer (8), and locknut (7). Do not tighten capscrew (12). 3-61. RADIATOR AND FAN SHROUD ASSEMBLY MAINTENANCE (C ont’d) c. Installation TM 9-2320-280-20-2 3-112 Change 2 b. Cleaning and Inspection CAUTION Using high water pressure when cleaning engine and transmission oil cooler and radiator can cause damage. High water pressure should not be directed at cooler or radiator. 1. Remove dirt, trash, and insects embedded in radiator fins, using water and compressed air. 2. Inspect radiator adapter (19) for damage. Replace adapter (19) if damaged. 3. Inspect radiator (6) for breaks, punctures, cracks, and splits. Replace radiator (6) if broken, punctured, cracked, or split. 4. Inspect shroud bulkhead adapter (20) for damage. Replace bulkhead adapter (20) if damaged. NOTE For on vehicle fan shroud repair only, use repair kit listed in Appendix C. 5. Inspect fan shroud (16) for cracks, splits, and breaks. Repair fan shroud (16) if cracked, split, or broken. Replace fan shroud if damaged beyond repair. 6. Inspect fan drive hose (21) for cracks or damage. Replace if defective. WARNING Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with effective chip guarding and personal protective equipment (goggles/shield, gloves, etc).