BUSHING 2136683 - Caterpillar

The 5P6524 Engine Timing Indicator Group has all the tools needed to check for piston top center (TC) on most Caterpillar diesel engines. The adapters have internal threads on the dial indicator end, so a collet can be installed to better hold the dial indicator in position. Make reference to the chart on page 2 for the tools needed for a particular engine. The 1P540 Flow Checking Tool Group supplies pressurized fuel to the fuel injection pump to determine injection timing. The group consists of a fuel tank with a hand pump for field use, a pressure regulator valve (serviced by 5P2413 Air Regulator Assembly) to permit use of shop air, a fuel pump outlet tube and connecting hoses. A 6V2023 Flow Checking Adapter Group is available for use instead of 7M1999 Tube Assembly, when flow checking an engine. This new adapter group must be used for those engines that have a reverse flow check valve in the fuel injection pump. 1 For engines that have the fuel injection nozzle under the valve cover, remove the valve cover and loosen glow plug conduit (1) to clear No. 1 fuel line. On all engines No. 1 piston TC, compression stroke, is the reference point for all timing procedures. On all engines, remove nut (2), No. 1 fuel injection line (3), the fuel injection valve body, and the nozzle assembly from precombustion chamber (4), or the adapter on direct injection engines. 2 Install the correct adapter (5). Tighten the adapter FINGER TIGHT ONLY to prevent damage to the nozzle seat. Put a small amount of clean oil on the correct rod (6) and put the rod in the adapter. Install 3P1565 Collet (7). 3 Install 9S215 Dial Indicator (8), with the correct contact point, and find top center (TC) compression position according to the procedure given in FINDING TOP CENTER (TC).Finding Top Center (TC)
1 Install the 5P6524 Timing Indicator Group; see the previous topic.2 Slowly turn the crankshaft in the direction of normal rotation until a maximum reading is observed on the dial indicator. Adjust the indicator in or out until the revolution counter is at +.300" (7.6) (black numbers). Tighten the collet (not too tight) and zero the outer bezel of the dial indicator.3 Slowly rotate the crankshaft in the same direction (normal rotation) until the dial indicator moves past +.280" (7.1). Now rotate the crankshaft in the opposite direction, moving the piston up, to +280" (7.1). Temporarily mark an accessible rotating member (flywheel, vibration damper, or crankshaft pulley) in relation to a stationary pointer or mark. CAUTION: Do not use a hammer or punch to mark the vibration damper (or any other marking method that could cause damage to the vibration damper).4 Continue to rotate the crankshaft in the direction that is opposite of normal rotation, past the maximum reading and past +.280" (7.1). Now rotate the crankshaft in the normal direction of rotation, moving the piston up, to +280" (7.1). Make a second temporary mark