RING-BACKUP 1156880 - Caterpillar

Installation Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     9U-7257     Cradle     1    
B     9U-7256     Guide     1    
C     9U-7225     Camshaft Pilot     2    
D     9U-7240     Camshaft Hook     2    
H     9U-7243     Alignment Sleeve     1    
J     9S-3263     Thread Lock Compound     1    
K     8T-2998     Lubricant     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that the camshaft and camshaft bearings are thoroughly clean. Lubricate the camshaft lobes with a 50/50 mixture of Tooling (K) and clean engine oil. Apply a thin coat of clean engine oil on the camshaft bearings.
Illustration 1 g00509797
Illustration 2 g00581441
Install Tooling (A) on the cylinder head at Location (Y) .
Illustration 3 g01024862
Install Tooling (B) on front housing (7) . Do not tighten the bolts that hold Tooling (B) to front housing (7) at this time.
Use Tooling (H) to align Tooling (B) with the camshaft bearings. Tighten the bolts that hold Tooling (B) to front housing (7) . Remove Tooling (H) .Note: Tooling (H) should move freely from the bore of Tooling (B) .
Illustration 4 g00581445
Install Tooling (C) in the end of camshaft (8) .Note: Rotate the camshaft during installation. This will prevent the camshaft from binding in the camshaft bearings.
Use a suitable lifting device in order to position camshaft (8) into Tooling (B) and the cylinder head. The weight of the camshaft is approximately 39 kg (86 lb).
Illustration 5 g00581444
Illustration 6 g00581443
Note: Tooling (C) must be removed before the camshaft can be completely installed in the cylinder head.
Remove the lifting device. Rotate the camshaft during installation. Use care not to allow the end of the camshaft and Tooling (C) to drop. Use Tooling (D) to assist in aligning camshaft (8) with the camshaft bearings.
Remove Tooling (C) and finish installing camshaft (8) in the bore.
Remove Tooling (A) and Tooling (B) .
Illustration 7 g00576240
Illustration 8 g00576839
Install O-ring seals (5) and (6) in seal assembly (3) . Lubricate seal (6) with Tooling (K) .
Install seal assembly (3) . Position adapter (4) . Ensure that the dowel in adapter (4) engages the hole in the camshaft.
Position thrust plate (1) . Apply Tooling (J) to bolts (2) . Hold thrust plate (1) in position and install bolts (2) . Evenly tighten bolts (2) until seal assembly (3) and O-ring seal (5) are seated against the cylinder head.Note: Be careful in order to ensure that O-ring seal (5) stays in the groove in seal assembly (3) .End By:
Install the rocker arms and the rocker shafts. Refer to Disassembly and Assembly, "Rocker Arm and Shaft - Install".
Install the camshaft gear. Refer to Disassembly and Assembly, "Camshaft Gear - Remove and Install".
Alternative Installation Procedure
Table 2
Required Tools    
Tool    Part Number    Part Description    Qty    
E (1)     177-8001     Sleeve     1    
F     177-8002     Adapter     1    
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