Measuring Outlet Pressures Of Solenoid Valve, Swing Ppc Shuttle Valve, And Swing Priority Selector Valve - Komatsu Galeo PC800-8 Shop Manual

SEN00912-02
Measuring outlet pressures of
solenoid valve, swing PPC
shuttle valve, and swing priority
selector valve
a Devices for measuring outlet pressures of sole-
noid valve, swing PPC shuttle valve, and swing
priority selector valve
Symbol Part Number
799-101-5002
1
790-261-1204
799-401-3200
2
02896-11009
Q
799-401-3300
3
02896-11012
799-101-5220
4
07002-11023
a Measure the outlet pressures of solenoid valve,
swing PPC shuttle valve, and swing priority
selector valve under the following condition.
k Lower the work equipment to the ground and
• Hydraulic oil temperature: 45 – 55°C
stop the engine. Operate the control levers sev-
eral times to release the residual pressure in the
piping, and then loosen the oil filler cap of the
hydraulic tank slowly to release the internal
pressure of the hydraulic tank.
1. Measuring outlet pressure of solenoid valve
1) Disconnect the hoses to be measured out of
outlet hoses (1) – (8) of the solenoid valves.
Install adapter Q2 and connect the hoses
again.
a When measuring the PPC lock solenoid
valve, remove the operator's cab under-
cover (the 2nd piece on the front side).
a If the solenoid valve side of a hose is
connected by a quick coupler, discon-
nect the other end of the hose (See the
connection diagram in "Measuring PPC
valve output pressure").
• (1): PPC lock solenoid valve
6
Part Name
Hydraulic tester
Digital hydraulic tester
Adapter (Size: 03)
O-ring
Adapter (Size: 04)
O-ring
Nipple (10 × 1.25 mm)
O-ring
30 Testing and adjusting
• (2): Travel speed shifting solenoid valve
• (3): Swing holding brake solenoid valve
• (4): Machine push-up solenoid valve
• (5): 2-stage relief solenoid valve
• (6): Travel junction solenoid valve
• (7): Swing priority solenoid valve
PC800, 850-8