CORE AS- 1734511 - Caterpillar

Assembly Procedure For The NA 297 Turbocharger
Table 1
Required Tools
Tool Part Number Part Description Qty
A 178-0193 Torque Wrench Adapter 1
B 178-0196 Torque Wrench Adapter 1
C 177-9781 Lifting Bracket 1
F 177-9791 Shaft Locking Tool 1
H 177-9800 Brace 1
J - Socket 1
K 6V-7820 Torque Multiplier 1
M 1U-8014 Allen Wrench 6mm 1
N 177-9809 Guide Rod 2
P 177-9811 Removal Tool 1
Q 6V-9104 Wrench 30mm 1
R 1U-6683 Ring Expander 1
S 8T-5096 Dial Indicator Group 1
T - Loctite 648 -
V - Loctite C5-A Anti-Seize Lubricant 1
W - Loctite 5900 Flange Sealant -
X - Feeler Gauge 1
Check the turbocharger's nameplate for the model. Use the appropriate assembly procedure depending on the type of turbocharger. If the model or type on the turbocharger's nameplate reads C254xx-xxxxxx, use the assembly procedure for the VTC 254 Turbocharger. If the model or type on the turbocharger's nameplate reads NA 297 or Napier 297, use the assembly procedure for the NA 297 Turbocharger.
Note: The following steps are for the preparation of the bearing housing.
Ensure the cleanliness of all the components before reassembly.
Ensure that the oil drain plugs are installed in the correct position on the bearing housing.
Illustration 1 g01293400
Replace O-ring seal (46) on alternate oil manifold (47).
Secure alternate oil manifold (47) by using the capscrews. Note: The following steps are for the bearings of the end housings (turbine and compressor).
Fit the drain plug to the housing of the turbine end bearing.
Illustration 2 g01292994
Install turbine end journal bearing (41) into housing (39).
Illustration 3 g01292990
Apply Tooling (T) to the threads of antirotation screw (42). Install antirotation screw (42) into housing (39).
Illustration 4 g01292989
Install retaining ring (40) in order to secure turbine end journal bearing (41).