Volvo DH10A 245 Service Manual page 14

Inlet and exhaust systems
Turbocompressor
For engine DH10 245, 285
Designation ................................ HX 40 W – 8594 Z
Cooling ...................................... Water-cooled
Lubricating system .................... Pressure-
Wastegate opening pressure ...... 155 kPa engine
With control rod travel on
wastegate ................................... 1±0.3 mm
Check value ............................... 0.4–1.5 mm
Axial clearance, rotor ................ 0.04–0.09 mm
Radial clearance at compressor
wheel .......................................... 0.33–0.50 mm
For engine DH10A 345, 350, 360
Designation ................................ GT 4288 N
Lubricating system .................... Pressure-lubrication
Maximum speed (all) ................. approx. 1400–1800 r/s
Measuring with bus stationary
Accelerator pedal in idle position:
Reference voltage ...................... 4.5–5.0 V
Control rod travel ...................... 0.3–0.6 V
Turbo pressure (voltage) ............ 1.30–1.50 V
Accelerator pedal in full throttle position:
Reference value ......................... 62–70% of U ref
lubrication
speed 4.04 volts
at 2000 r/min
(setting)
(81 000–108 000
r/min)
Measuring during driving
Accelerator pedal in full throttle position and
engine at max. load: See Performance Check
Starter pre-heater
Output ........................................ 3500 W
Pressure-drop indicator
Red indication at mm VP .......... 580–720
Exhaust-pressure governor
Control pressure with warm-up
and exhaust pressure braking . 750 kPa
Cooling system
Type ........................................... Overpressure closed
Pressure valve opens at .............. approx. 50 kPa
Coolant
Anti-freeze
Type ........................................... C
Consists of ................................. Glycol with
Colour ........................................ Blue-green
Volvo art no. 1 kg ...................... 1128700-9
5 kg ...................... 1129701-7
235 kg .................. 1129702-5
2
(0.5 kp/cm )
rustproofing
13