GASKET 2J6774 - Caterpillar

1 There are no identification marks or part numbers on the former or the new valve springs. The easiest way to tell the springs apart is to measure the outside diameter of the springs. The diameter of new spring (1) is 39.60 (1.56"0). The diameter of former spring (2) is 36.60 (1.44"0). The valve spring itself must be measured and not the valve spring retainer. Both the former and new retainers have the same outside diameter. A visual identification of the valve springs and components can be made if a careful inspection is made. Former valve spring (2) has a smaller outside diameter than former retainer (3), also retainer (3) fits down over the top of spring (2). New retainers (4) may have different thickness as shown but they do not fit down over the top of spring (1). This inspection will tell what type of spring is in the engine.***3208 Engine serial number 79V1 - 79V8713 Tools Needed For Valve Spring Installation
1 Use a grinder to remove section (A) from 8S2277 Adapter Assembly (1) to the dimensions shown. Remove adapter (2) from 7F4291 Compressor Assembly (3). Grind the head off rivet (4) and remove spacer (5). 2 Use a grinder to remove the corners and make a radius around the end of spacer (5) as shown. Install spacer (5) in compressor assembly (3) with 1D4533 Bolt (6) and 2D6235 Nut. Install adapter (1) with S1615 Bolt (7), 4F7957 Bolt (8) and two 2D6235 Nuts. Bolt (7) must be on the same side that had section (A) removed. Do not tighten bolts (7) and (8) enough to bend adapter (1). 3 Remove valve cover (9). Inspect the valve springs and retainers (10) to tell if it is necessary to install the new size valve springs; see the procedure on page 2. Remove rocker shaft (11) and fuel injector nozzles (12). The former fuel nozzle clamp assemblies must not be used again. 4 For engines that need new valve springs, but do not need the modifications shown in step 8, page 7, rotate the engine until the number one cylinder is at TDC (top dead center). In this position, number four will also be at TDC. Install compressor assembly (3) on the exhaust valve with 1D4540 Bolt (13) and 4B5270 Flat Washer. Lift up on the handle to compress the valve spring. Use 8S2293 Magnet Assembly (14) to remove the two valve spring locks. Slowly lower the handle until the compression is removed from the valve spring. Remove the valve spring, retainers, washers and spring seat from each valve stem. All the former parts must be removed from the valve stem. Keep only the two valve spring locks; they will be used again. All the other parts must not be used again. Install new 1W9897 Washer (15), 1W4259 Spring (16) and 1W4260 Retainer (17). Put the locks in 5S1322 Valve Keeper Inserter (18). Do not mix the former parts with the new parts. Carefully compress the