BELT-SERPENTINE 2403374 - Caterpillar

Put 9S3263 Thread Lock on the threads of all studs before installing in the block:(1) Thickness of spacer plate ... .5142 .0010 in.(13.061 0.025 mm)Torque for two bolts through rear of each spacer plate (1) into the block ... 35 5 lb.ft.(45 7 N m)Thickness of gasket between spacer plate (1) and block ... .008 .001 in.(0.20 0.03 mm) There must not be any fuel, water, oil, gasket adhesive or any other material on the bottom of the plate, top of the block and both sides of gasket during assembly.For height of liner over spacer plate (1), make reference to CYLINDER LINER PROJECTION.(2) Torque for studs ... 20 3 lb.ft.(25 4 N m)(3) Bore in block for main bearing with standard outside diameter ... 5.6345 .0005 in.(143.116 0.013 mm) Bore in block for .025 in. (0.64 mm) oversize (larger than standard outside diameter) main bearing ... 5.6595 .0005 in.(143.751 0.013 mm)(4) Dimension (new) from center of main bearing bore to top of block below spacer plate (top decks) ... 19.478 .002 in.(497.74 0.05 mm)(5) Dimension (new) from center of main bearing bore to bottom of block (pan rails) ... 8.000 .001 in.(203.20 0.03 mm)Make reference to issue of SERVICE MAGAZINE, May 15, 1975 (Form No. SEBD1512) for ENGINE REBUILD PROCEDURES on D346, D348 and D349 engines. (6) Clearance between the main bearing caps and their respective slots must be .0018 in. (0.048 mm) tight to .0012 in. (0.030 mm) loose. Torque for main bearing studs ... 170 20 lb.ft.(230 25 N m)Torque for nuts holding caps for main bearings:Tighten bearing nuts in sequence ... A, B, C, Da. Put 5P960 Grease or crankcase oil on threads and washers.b. Tighten all nuts in correct sequence to ... 60 5 lb.ft.(80 7 N m)c. Put mark on each nut and ends of studs.d. Tighten all nuts in correct sequence from mark ... 120°(7) Torque for bolt holding piston cooling tube ... 35 5 lb.ft.(45 7 N m)Minimum permissible clearance between piston and piston cooling tube ... .025 in.(0.64 mm) Be sure that the correct piston cooling tubes are installed. The procedure for checking the clearance is in Special Instructions (GEG02495).