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30 TESTING AND ADJUSTING
TEST BOOST PRESSURE
Tools for testing boost pressure
Symbol
Part No.
-
799-201-2202
A
1
799-401-2311
2
799-101-5160
-
799-401-2301
B
1
790-261-1130
k
Place the machine on a level ground, and then lower the work equipment completely to the ground in
a stable posture. Set the lock lever to LOCK position, and then stop the engine.
k
Parts and oil are still very hot immediately after the engine is stopped. It may cause burn injury. Wait
for the temperature to go down, and then start the work.
Check this item under the following conditions.
•
Engine coolant temperature: 60 to 100 °C
•
Hydraulic oil temperature: 45 to 55 °C
For testing the boost pressure to perform troubleshooting, refer to this section.
METHOD FOR TESTING BOOST PRESSURE ON MACHINE MONITOR
1.
Start the engine.
2.
Select and display "Pre-defined Monitoring" (01/11) by referring to "SET AND OPERATE MACHINE MONI-
TOR".
3.
Set the engine coolant temperature and the hydraulic oil temperature so that it is within the testing condition
range.
4.
Select and display the following monitoring items on "Pre-
defined Monitoring" (02/11) and (3/11) or "Monitoring Se-
lection Menu".
Monitoring code: 36500 "Charge Pressure"
Monitoring code: 37400 "Ambient Pressure"
5.
Set the working mode to P ("Power Mode").
6.
Turn off the auto-deceleration.
7.
Turn the swing lock switch to ON position.
REMARK
If the swing lock switch is turned on, the main relief valve
is set for high-pressure relief.
8.
Turn the fuel control dial to MAX (High idle) position.
9.
Test the boost pressure when the oil pressure is relieved in
arm IN circuit + one-touch power maximizing is ON by op-
erating the work equipment control lever.
For standard values, see the absolute pressure in STAND-
ARD VALUE TABLE, "STANDARD VALUE TABLE FOR
ENGINE".
PC500LC-10R
Part name
Boost gauge kit
Gauge
Nipple
Pm kit
Coupling
TEST BOOST PRESSURE
Q'ty
Remarks
1
1
Pressure range-760 to 1500 mmHg
1
Size: R1/8
1
1
30-21
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