4
-
17. REPLACEMENT OF HIGH-SPEED VALVE
(Figure 4-17)
WARNING: ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
•
Shut down turntable, welding power source, and
robot control,
and disconnect input power
employing “lockout/tagging procedures” before
inspecting or servicing.
Lockout/tagging procedures consist of removing plug
from receptacle, padlocking line disconnect switch in
open position, removing fuses from fuse box, or shut-
ting off and red-tagging circuit breaker or other discon-
necting device.
MOVING PARTS can cause serious injury.
•
Keep clear of pinch points.
PRESSURIZED HYDRAULIC FLUID
can cause
serious injury.
•
Release hydraulic fluid pressure according to Sec-
tion 4-73 before touching any hydraulic com-
ponents.
Hydraulic fluid pressure is present even though elec-
trical power is disconnected.
1.
Release pressurized fluid from accumulator (see
Section 4-13).
2.
Disconnect hydraulic hose from lower fitting on
valve.
3.
Loosen upper fitting, and disconnect valve from
manifold block.
4.
Remove screw from rear
of electrical plug, and
disconnect plug from solenoid.
5.
Remove hydraulic fittings from valve.
6.
Clean threads on fittings, apply teflon tape to
threads, and install fittings in proper locations on
replacement valve.
7.
Connect plug
to replacement valve solenoid, and
secure with screw removed in Step 4.
8.
Connect valve to upper fitting on manifold.
9.
Connect hydraulic hose to lower fitting on valve.
10.
Manually run the program for rotating mounting
plate
using
the
BLOCK
FORWARD
CON-
TINUOUS mode
to check
high-speed valve
operation. Make necessary adjustments follow-
ing proper procedures (see Sections 3-5 and
4-5).
11.
Reinstall front cover on turntable chassis.
Locking
Pin
Figure 4
-
18. Location Of Locking Pin Cylinder
OM-890 Page 30