TM 9-2320-361-34 15-51. PIPELINE CONSTRUCTION BODY MAINTENANCE (Contd) I a. Subframe Removal NOTE Perform step 1 if installing new subframe. 1. 2. 3. 4. 5. 6. 7. 8. Remove six locknuts (19), four screws (1), and two screws (3) from toolbox (20) and two brackets (2) from subframe (6). Discard locknuts (19). Remove eight locknuts (13), washers (12), four screws (4), and screws (5) from two brackets (18), brackets (7), frame brackets (14), and frame brackets (15). Discard locknuts (13). Remove six locknuts (9), four screws (17) and two screws (16) from two plates (8) and frame (11). Discard locknuts (9). Attach chains, lifting device, and guide lines to subframe (9). WARNING . All personnel must stand clear during lifting operations. A swinging or shifting load may cause injury to personnel. ● Toolbox and subframe are heavy. Ensure lifting device has a weight capacity greater than the weight of the toolbox and subframe. Failure to do so may result in injury to personnel or damage to equipment. Remove subframe (6) from toolbox (20) and frame (11) and place on wooden supports. Remove lifting device and chains from subframe (6). WARNING Toolbox is heavy. Ensure toolbox is empty before removing from frame. Support toolbox during removal. Failure to do so may result in injury to personnel. NOTE Perform step 7 if installing new subframe. Remove toolbox (20) from frame (11). Remove and inspect two fillers (10) for splitting and wear. Replace if split or worn. 15-218