Isuzu N-Series. Manual — part 642
TURBOCHARGER 6G-1
ENGINE 4J SERIES
SECTION 6G
TURBOCHARGER
Contents
TURBOCHARGER. . . . . . . . . . . . 6G-2
Main Data and Specifications . . . . . . . 6G-2
GENERAL DESCRIPTION . . . . . . . . ...6G-3
DISASSEMBLY. . . . . . . . . . . . . .6G-5
Component . . . . . . . . . . . . . . 6G-5
Disassembly Steps . . . . . . . . . . . 6G-6
INSPECTION AND REPAIR . . . . . . . . .6G-7
REASSEMBLY. . . . . . . . . . . . . ..6G-9
6G-2 TURBOCHARGER
TURBOCHARGER
Main Data and Specifications
IHI: Ishikawajima-Harima Heavy Industries., Ltd.
Model
IHI RHF 4H
IHI RHB 5
Turbine type
Mixed-flow
Radial-inflow
Compressor type
Centrifugal
Maximum permissible speed
rpm
180,000
Wastegate opening pressure
kPa (mmHg)
109
± 4.4 (815 ± 33)
120
± 4.8 (898 ± 36)
Weight
N (kg/lb)
41 (4.2/9.3)
45 (4.6/10.1)
TURBOCHARGER 6G-3
GENERAL DESCRIPTION
The turbocharger internal mechanism consists of the turbine wheel, the compressor wheel, and the radial bearings.
These parts are supported by the bearing housing.
The turbocharger external mechanism consists of the compressor housing air intake port and the turbine housing air
exhaust port.
The turbocharger increases air intake efficiency. This results in increased engine power, reduced fuel consumption,
and minimal engine noise.
The turbocharger operates at very high speeds and temperatures. Part materials have been carefully selected and
machined to extremely high precision.
Turbocharger servicing requires great care and expertise.
If reduced performance is noted, check the engine for damage or wear. If there is no apparent engine damage or
wear, trouble with the turbocharger is indicated.
N6A3600E
6G-4 TURBOCHARGER
Identification of Unit
The turbocharger nameplate gives the date of manufac-
ture and other important information required to identify
the unit when service inquiries are made.
The turbocharger nameplate has the following informa-
tion stamped on it.
1. Turbocharger Specification Number, Production
Year and Month
2. Production Date, Serial Number
3. ISUZU Parts Number
Turbocharger Servicing
1. Refer to TROUBLESHOOTING in this Manual to
determine whether or not turbocharger repair or
overhaul is required.
2. The following procedures should also be per-
formed (either with the turbocharger on the vehicle
or removed from the vehicle but not disassembled)
to determine whether or not turbocharger repair or
overhaul is required.
• Visual checks
• Clearance measurements
• End play measurements
Refer to INSPECTION AND REPAIR
3. The turbocharger compressor and turbine housing
may be removed from the center housing and ro-
tating assembly (CHRA) for further visual inspec-
tion.
Refer to DISASSEMBLY and REASSEMBLY.
Precautions
Turbocharger servicing requires great care and exper-
tise.
Faulty turbocharger servicing procedures can result in
serious damage to pistons, valves, cylinder liners, and
other important engine parts.
ISUZU does not recommended the performance of any
servicing procedure not specified described in this Man-
ual.
Contact your nearest IHI service facility to have the tur-
bocharger assembly repaired or overhauled.
The identification plate and assembly number will be re-
quired by the service facility.
A list of IHI Turbocharger Service Network locations is
given at the end of this Section.
N6A3601E
N6A3602E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст