Page 344 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

6 Remove the crankshaft cover.
7 Place the power end on its side with the crankshaft extension pointing upwards. Lift the crankshaft upwards
using a lifting eye adapted to 4”-8 threads in the end of the cranks haft extension. It may necessary to heat
the power end around the spherical bearing retainer (less than 250 degrees F oven or oil bath) to break the
bearing retainer away from the frame. Be careful when pulling the crankshaft roller bearings through the outer
races, as not to cratch the inner surfaces of the races. Rotating the crankshaft while pulling up aids removal.

8 Remove the bearing retainer, adapter, and spherical bearing from the crankshaft. It may be necessary to heat
the adapter and bearing to remove.
9 Remove all the roller bearing retainers (cap screws, nuts and washers) from the crankshaft.
10 Remove the bearings from the crankshaft. It may be necessary to apply low heat to remove the bearings from
the crankshaft.
11 Remove all the roller bearing retainers in the power end.
12 Remove the outer races of the bearings in the frame by tapping them out with a soft metal (brass) bar.

13 Thoroughly clean and inspect all parts for cracks, pits, or scoring and replace if necessary prior to re-assembly.
Frame bores should be clean and smooth, free of nicks and raised metal.
14 Label the three straight roller bearings and outer races as match sets for proper re-assembly.

15 For easiest assembly, place the outer bearing races in the freezer for at least 8 hours to allow the bearing
races to shrink.
16 On the inner side of the two inner main bearing rings of the frame (closest to the centreline), install three (3)
cap screws with main bearing retainer washers between the frame and bolt head. On the opposite side of
the frame, install a nut on the capscrew. The washers will act as stop for the outer bearing races during re-
assembly and center the outer bearing race in the bore of the frame.
17 One at a time, remove the outer bearing races from the freezer and install in the two inner bearing bores of
the frame by passing the race through the outer frame bores. The outer bearing races should shoulder against
the installed washer. Keep the races as level as possible during the assembly process.
18 On the inner side of the off drive outside main bearing ring of the frame, install three (3) cap s c r e w s
with main bearing retainer washers between the frame and bolt head. On the opposite side of the frame,
install a nut on the cap screw. The washers will again act as a stop for the final main bearing outer race.
19 Remove the final outer bearing race from the freezer and install in the off drive main bearing bore of the frame.
Keep the race as level as possible during the assembly process.
20 The outboard bearing bore on the input side of the frame should be left open.
21 Remove the nuts on the main bearing retainer bolts and install retainer washers and locknuts (the off drive
outside main bearing retainers in the frame can not be installed until the crankshaft cover is installed)
22 On the inner side of the two inner cheeks of the crankshaft (closest to the centreline), install three capscrews
with main bearing retainer washers between the crankshaft cheek and bolt head. On the opposite side of the
crankshaft, install a nut on the cap screw. The washers will act as a stop for the main bearings during re-
assembly and center the bearing on the crankshaft.

23 One at a time, heat the straight roller bearings (less than 250 degrees F oven or oil bath) and install on the two
inner cheeks of the crankshaft by passing the bearing over the outer crankshaft cheeks. The roller bearings
should shoulder against the installed washer. Keep the bearings as level as possible during the assembly
process.
24 On the inner side of the off drive outside crankshaft cheek, install three cap screws with main bearing retainer
washers between the crankshaft and bolt head. On the opposite side of the crankshaft cheek, install a nut on
the cap screw. The washers will again act as a stop for the final main roller bearing.
25 Heat the final main roller bearing and install on the off drive main bearing check of the crankshaft. Keep the
race as level as possible during the assembly process.
26 The outboard bearing cheek on the input side of the crankshaft should be left open.
27 Heat and install the spherical bearing onto the drive side crankshaft cheek.

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CITS : Automotive - Mechanic Diesel - Exercise 18.5