TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 2 Download
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, TM 9-2320-387-24-2 15-l 0. TIMING CHAIN COVER, TIMING CHAIN, AND DRIVE SPROCKETS MAINTENANCE (Cont’d) c. Installation 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Install woodruff key (8) in camshaft (71 and two woodruff keys (9) in crankshaft (10). Install crankshaft sprocket (11) and camshaft sprocket (5) in timing chain (6) and align timing marks (12). Rotate crankshaft (10) and camshaft (7) so woodruff keys (81 and (9) align with keyway slots in crankshaft sprocket (11) and camshaft sprocket (5). CAUTION Timing marks on crankshaft sprocket and camshaft sprocket must remain aligned after installation or engine damage may result. Install crankshaft sprocket (111, camshaft sprocket (5), and timing chain (6) as an assembly onto camshaft (7) and crankshaft (10). Install pump drive gear (3) on camshaft (7) with timing mark (4) at 0 degrees with washer (2) and capscrew (1). Tighten capscrew (1) to 55-66 lb-R (75-90 N-ml. Apply lubricating oil to timing chain (6). NOTE Perform step 7 only if timing chain was replaced. Using dial indicator, check deflection of timing chain (6) midway between camshaft sprocket (5) and crankshaft sprocket (11). Total deflection must not exceed 0.5 in. (12.7 mm). If deflection exceeds specification, inspect camshaft sprocket (5) and crankshaft sprocket (11) for damage. Replace either if damaged and recheck deflection. Apply a 0.094 in. (2.4 mm) bead of sealant to sealing surface on timing chain cover (171, following sealant diagram. Install gasket (19) and timing chain cover (17) on cylinder block (24) with four washers (271, capscrews (281, and short capscrew (29). Tighten four capscrews (28) and short capscrew (29) to 33 lb-R (45 Nom). Secure timing chain cover (17) to oil pan (26) with four capscrews (25). Tighten capscrews (25) to 4-10 lb-f% (5-14 Nom). CAUTION Maintain 0.040 in. (1.02 mm) minimum clearance between baffle plate and pump drive gear to avoid noise. Install baffle plate (16) in timing chain cover (17) with two capscrews (30) and nut (15). Tighten capscrews (30) and nut (15) to 33 lb-R (45 N-m). Align timing mark (21) on injection pump (20) with timing mark (18) on timing chain cover (17) and install three washers (22) and nuts (23). Align timing mark (31) on driven gear (14) with timing mark (4) on drive gear (3) and install three capscrews (13). Tighten capscrews (13) to 15-20 lb-ft (20-27 N-m). 15-22