Volvo DH10A 245 Service Manual page 119

Radial clearance, checking
9708
7600
118
Checking, cont.
A damaged shaft with scored bearing surfaces must not
be refitted. Minor scratches are acceptable.
A damaged turbine or compressor wheel must always
be replaced. Do not try to straighten out a deformed
blade. The housing should be replaced if it has cracks
or has been exposed to overheating.
Very often the best alternative is to replace the entire
compressor (exchange unit) if, e.g., the shaft, housing
or some blades are damaged.
Axial clearance, rotor .................... 0.10–0.16 mm
Radial clearance at
compressor wheel, max. ............ 0.635 mm
new bearings .............................. 0.37–0.56 mm
Throw, at shaft smallest diameter .. max. 0.015 mm
Throw, turbine wheel rear ............. max. 0.16 mm
To note when assembling
– Oil the bearing bushings and piston rings with
straight engine oil.
– Make doubly sure that the piston ring seals
centre correctly against the bearing bushings.
– Tightening torque for thrust bearing three bolts
is 4.5 Nm (0.45 kpm). Torque wrench 999
9708 and adapter 998 7600.
– Tightening torque for compressor wheel lock
nut 17 Nm (1.7 kpm). NOTE! L-H thread.
– Tightening torque for turbine housing bolts
13.6 Nm (1.4 kpm) and compressor housing
bolts 5.7 Nm (0.6 kpm).
Repair kit
1. –
2. Bearing bushing
3. Thrust bearing
4. Lock ring
5. Circlip
6. Screw
7. Screw
8. Lock washer
9. O-ring
10. Piston ring seal