Measuring Intake Air Pressure (Boost Pressure) - Komatsu Galeo PC800-8 Shop Manual

SEN00786-02
Measuring intake air pressure
(Boost pressure)
a Measuring instruments for intake air pressure
(boost pressure)
Symbol Part No.
A 799-201-2202
a When installing and removing the measuring
instruments, take care not to touch a hot part of
the engine.
a Measure the intake air pressure (boost pres-
sure) under the following condition.
• Engine coolant temperature: Within operat-
ing range
• Hydraulic oil temperature: 45 – 55°C
1. Open the engine compartment cover on the
counterweight side.
2. Remove intake air pressure pickup plug (1).
3. Install nipple [1] of boost gauge kit A and con-
nect gauge [2].
6
Part Name
Boost gauge kit
4. Run the engine at a medium or higher speed
and drain the oil from the hose.
a Insert the connecting parts of the gauge and
hose about a half and open the self-seal on
the hose side repeatedly, and the oil will be
drained.
a If Pm kit (799-401-2301) is available, the air
bleed coupling (790-261-1130) inside the kit
can also be used.
a If oil is left in the hose, the gauge does not
work. Accordingly, be sure to drain the oil.
5. Set the working mode switch to P mode and turn
the heavy lift switch ON.
6. Run the engine at high idle and measure the air
supply pressure (boost pressure) when the
boom RAISE circuit is relieved.
7. After completing the measurement, remove the
measuring equipment and set to the original
condition.
30 Testing and adjusting
PC800, 850-8