TUBE AS 4903525 - Caterpillar

Removal Procedure
Disconnect all hoses, tube assemblies and wire leads from the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove" Steps 1 through 7.
Illustration 1 g01335809
Illustration 2 g01335810
Loosen bolts (4) and (6) in reverse numerical order. Refer to Illustration 2. Note: This will help prevent distortion of the exhaust manifold.
Remove center bolts (4) from exhaust manifold (3). Remove outer bolts (6) and spacers (5) from exhaust manifold (3). Note: Support the manifold as the bolts are removed.
Remove the assembly of exhaust manifold (3) and turbocharger.
Remove exhaust manifold gaskets (1).
Remove the turbocharger from exhaust manifold (3). Refer to Disassembly and Assembly, "Turbocharger - Remove" Steps 8 through 15.
If necessary, remove studs (2) from exhaust manifold (3). Installation Procedure (Top Mounted Exhaust Manifold)
Table 1
Required Tools
Tool Part Number Part Description Qty
A - Guide Stud
(M10 by 100 mm) 4
B - Loctite 575 1
Illustration 3 g01335810
Illustration 4 g01335809
Ensure that the exhaust manifold is clean and free from damage. If necessary, replace the exhaust manifold. Clean the mating surface of the cylinder head.
If necessary, install studs (2) to exhaust manifold (3). Tighten the studs to a torque of 18 N m (13 lb ft).
Install the turbocharger to the exhaust manifold. Refer to Disassembly and Assembly, "Turbocharger - Install" Steps 1 through 14.
Install Tooling (A) to the cylinder head in positions (X). Refer to Illustration 3.
Position two new exhaust manifold gaskets (1) onto Tooling (A). Note: Ensure that the word TOP is outward and upward.
Align exhaust manifold (3) with Tooling (A). Install the exhaust manifold to the cylinder head.
If bolts (4) and (6) have been previously used, the bolts should be thoroughly cleaned. Tooling (B) should be applied to the first two threads of the bolts. Note: Do not apply Tooling (B) to new bolts.
Install bolts (4) finger tight. Install bolts (6) and spacers (5) finger tight.
Remove Tooling (A). Install remaining bolts (4) finger tight. Install remaining bolts (6) and spacers (5) finger tight.
Tighten bolts (4) and (6) to a torque of 44 N m (32 lb ft). Tighten the bolts in the sequence that is shown in Illustration 3.
Connect all hoses, tube assemblies and wire leads from the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Install" Steps 16 through 24.