Assembly Instructions / Turbochargers A131-R, A136-R
4 Installing the turbocharger / 4.5 Fastening the turbocharger with a standard nut
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HZTL455311P0044_EN
Rev. A
April 2023
4.5
Fastening the turbocharger with a standard nut
u
Fit the nuts and tighten them according to variant 1 or 2 in the table below.
Product
Through hole in
bearing casing [mm]
Fixing screws [mm]
Variant 1: Tightening
torques [Nm] **)
Variant 2: Hydraulic
pre-tensioning
forces [kN]
A131-R
Ø 17
M16
280
110
A136-R
Ø 21
M20
560
175
Table 8: Tightening torque for standard nuts
**) When the turbocharger is mounted on the engine support, the bolt threads and screw heads must
be lightly oiled (assumed friction coefficient
µ
= 0.12 for tightening torque)
u
Remove the lifting gear.
4.6
Connecting the turbocharger
u
Connect the cable to the speed sensor (86515).
u
Connect all exhaust gas, water, blow-by and air lines according to the instructions of the engineb-
uilder.
Version with compressor wheel cooling
CAUTION
Failure of compressor wheel cooling
Any prolonged failure of the compressor wheel cooling will shorten the replacement
interval of the compressor wheel.
u
Make sure there is an uninterrupted supply of cooling air during operation.
Fig. 11: Connecting the compressor cooling air intake
u
Remove the lock from the connection for the compressor wheel cooling (01) and fit the cooling air
line.
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Summary of Contents for Turbocharger A131-R
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