D342 INDUSTRIAL & MARINE ENGINES Caterpillar


Turbocharger (T1870)

Usage:

(1) End play for shaft ... .0065 ± .0025 in.(0.165 ± 0.063 mm)

(2) Bore in the bearing ... .6268 to .6272 in.(15.921 to 15.931 mm)

Diameter of journal for the bearing ... .6250 to .6254 in.(15.875 to 15.885 mm)

(3) Torque for bolts holding compressor housing ... 105 ± 5 lb.in.(121.06 ± 5.8 cm.kg)

(4) Torque for bolts holding (turbine housing) ... 175 ± 15 lb.in.(201.8 ± 17.3 cm.kg)

(5) Torque for bolts holding turbocharger to manifold ... 40 ± 4 lb.ft.(5.5 ± 0.6 mkg)

(6) Install impeller as follows:

a. Get temperature of impeller to ... 350°F(177°C)

b. Install impeller on shaft.

c. Tighten nut to ... 150 lb.in.(172.9 cm.kg)

d. Let impeller cool to below ... 150°F(70°C)

e. Loosen nut and put lubricant on threads:

f. Tighten nut to ... 30 lb.in.(34.6 cm.kg)

g. Tighten nut an added ... 90°

(7) Clearance between ends of oil seal ring ... .001 to .006 in.(0.03 to 0.15 mm)

(8) Torque for bolts holding thrust plate ... 35 ± 5 lb.in.(40.4 ± 5.8 cm.kg)

(9) Bore in housing ... .9827 to .9832 in.(24.961 to 24.973 mm)

Outside diameter of the bearing ... .9780 to .9785 in.(24.841 to 24.854 mm)

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