Komatsu 4D98 Series Shop Manual page 110

6. Turbocharger (for 4TNE106T)
8.6
Reassembly Procedure
Y
_CircliD
(1) Preparation for reassembly
@ Prepare general tools, special tools, liquid
gasket,(Three Bond No.1 207) and Locktite
No.242 before reassembling the
turbocharger.
@ Always replace the following parts with
Lubricating oil inlet
new ones:
n
l
Turbine side seal ring 1
pc.
l
Compressor side seal ring (large) 1
pc.
l
Compressor side seal ring (small) 1
pc.
l
M3 machine screws 3 PCS.
l
M3 machine screws 4 PCS.
(2) Reassembly
Lubricating oil inlet
(2.1) Floating bearing installation
@ Use the snap ring pliers and install inner
B
circlip 16 on bearing housing 15.
@ Install floating bearing 5 in bearing hous-
ing 15.
@ Use the snap ring pliers and install outer
circlip 16 on bearing h&sing 15.
Note-l) The circlip joint shall be posi-
1 For all other than above
1
tioned as shown in the figure at
right above.
22
bating metal ._
n
5
.Match
UP
Contact
!iWbCe ,
The rounded side of the circlip shall face the bearing.
Note-Z) Apply lubricating oil on the floating bearing before reassembly.
(2.2) Turbine shaft installation
@I Fit the seal ring onto turbine shaft 1.
@ install heat insulating plate 20 on the turbine side of bearing housing 15.
@I Apply lubricating oil on the journal portion of the turbine shaft and insert the shaft from the
turbine side of bearing housing 15.
Note) Careful/y operate so as not to damage the floating bearing by the turbine shaft.
The seal ring joint shall be positioned on the lubricating oil inlet side affer center-
ing with the turbine shaft.
(2.3) Thrust bearing installation
@ Fit thrust bushing on turbine shaft 1.
@ Apply lubricating oil on the bearing portion of thrust bearing 6 and install it in bearing
housing 15.
@ Apply Locktite on the threaded portion of M3 Torx T machine screw 17 for thrust bearing
installation, and use Torx torque driver for installation by tightening to the specified
torque.
Tightening torque: 13 fl kgf-cm (1.3 + 0.1 N-m)
8-14