RING-RETAINING 3P3743 - Caterpillar

Remove & Install Camshaft
Start By:a. remove timing gear coverb. remove valve lifters Fluid Spillage ContainmentCare must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "Tools And Shop Products Guide", NENG2500 for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates.1. Turn the engine to top center (TC) compression stroke for the No. 1 piston.
Typical Example2. Remove four bolts (2) and plate (1) that hold the idler gear in place.3. Remove idler gear (3).
Typical Example 4. Remove two bolts (4) and retainer (5) that hold the camshaft to the cylinder block.5. Carefully, remove the camshaft assembly from the cylinder block.
Do not pull the camshaft gear from the camshaft. Inspect each tooth of camshaft drive gear (6) for visible cracks and chipping (spalling). Replace the entire camshaft assembly if necessary.
The following steps are for the installation of the camshaft.6. Put clean engine oil on the lobes and journals of the camshaft.7. Carefully, install the camshaft assembly in the cylinder block.8. Install the retainer that holds the camshaft in the cylinder block.9. Install idler gear (3) on its shaft. Be sure the "V" mark on idler gear (3) is in alignment with the "B" mark on the crankshaft gear. The "K" marks on the camshaft gear can be seen at the edge of the idler gear.10. Install plate (1) and the bolts that hold the idler gear in place. It will be necessary to check the timing of the automatic timing advance. See the topic, "Camshaft Timing For Fuel Injection Pump" in the Systems Operation, Testing & Adjusting Manual.End By:a. install valve liftersb. install timing gear cover