COVER-BASE 4556923 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-0520 Driver Gp 1 Start By:
Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g01027207
Rotate the crankshaft until the number one piston is at the top center position. Timing mark (4) for camshaft idler gear (2) should be in line with timing mark (5) for crankshaft drive gear (6).
Remove the bolts that fasten plate (1) to idler shaft (3). Remove plate (1).
Slide camshaft idler gear (2) from idler shaft (3).
Use Tooling (A) and a suitable press to remove the bearing from camshaft idler gear (2).
Remove the bolt and idler shaft (3) from the cylinder block. Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 1P-0520 Driver Gp 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g01027207
Position idler shaft (3) on the cylinder block. Install the bolt that holds idler shaft (3) to the cylinder block. Tighten the bolt to a torque of 70 15 N m (51 11 lb ft).
Use Tooling (A) and a suitable press to install the bearing in camshaft idler gear (2). Install the bearing until the bearing is 0.40 0.25 mm (0.016 0.010 inch) below the front face of camshaft idler gear (2).
Install camshaft idler gear (2) on idler shaft (3). Align timing mark (4) for camshaft idler gear (2) with timing mark (5) for crankshaft drive gear (6).
Position plate (1) and install the bolts. Tighten the bolts to a torque of 70 15 N m (51 11 lb ft). End By:
Install the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Install".