Table of Contents
Advertisement
HIGH REACH DEMOLITION EQUIPMENT 27M
REMARK
Before replacing plug 1, stop the engine and release residual
pressure in the piping, while monitoring oil temperature.
q Loosen the hexagonal socket headed plug (indicated in figure
1 for paragraph 5 above), using an Allen wrench.
q Run the engine at half throttle speed.
q Set the boom control lever to DOWN to purge air from the
plug.
q Raise and lower the boom several times until oil continuously
come out (no bubbles emerge).
q When air purging ends, tighten the plug.
3. Re connection.
q Reconnect the boom PPC hoses of the control valve so that
there is no oil leakage.
REMARK
Before executing this work, stop the engine and release residual
pressure in the piping, while monitoring oil temperature.
PURGING AIR FROM HYDRAULIC DRIFT PREVENTATIVE VALVE PPC
CIRCUITS OF MID LINK AND ARM CYLINDER.
REMARK
Purge air in accordance with section "Purging air from hydraulic
drift preventative valve PPC circuit of boom cylinder."
1. Connection of hydraulic drift preventative valve PPC circuits
of mid link and arm cylinders.
q For details of hose connections of the long boom PPC circuit,
see the parts list.
1 - Mid Link Safety Return Line.
2 - Boom Safety Return Line.
3 - Arm Safety Return Line.
2. Installation to mid link cylinder.
q Connect hose 5 in Figure 2 to hose 6 in Figure 3, then purge
air.
3. Installation to arm cylinder.
q Connect hose 2 in Figure 2 to hose 8 in Figure 4, then purge
air.
PURGING AIR PROCEDURES
Figure 1. Line on machine main body
7
7-43
Advertisement
Chapters
Table of Contents
