5. To replace pump-piston assembly:
A. Note position of pump-piston shell with respect to
pump-link assembly.
B. Unscrew shell far enough to expose piston pin.
C. Push pin out and discard pump piston.
D. Install new piston and adjust the pump-piston shell
to its approximate original position.
otee:
N
After re-assembling the recloser must be tested;
refer to TESTING Section, preceding in this manual.
Head assembly
Disassembly
Disassembly of head mechanism should normally not be
required. Should it become necessary, follow these steps:
1. Trip recloser open by pulling down the manual
operating handle.
otee:
N
Figure 12 shows head assembly as it will appear after
vacuum interrupting structure, series-trip solenoid,
hydraulic mechanism, and insulating stringers have
been removed. Bushing removal is required for
further head tear down.
Cap screws
Spacers
Self-locking
nut
Figure 12 . Head operating mechanism
2. Remove self-locking nut and four hex cap screws
shown in Figure 12. Note locations of washers
and spacers.
3. Lift operating mechanism assembly enough to expose
pivot point, see Figure 13. Remove C-ring and pin to
free operating mechanism.
C-Ring
Figure 13 . Removal of operating mechanism
4. Carefully unhook lockout spring, operating lever spring
and counter spring, see Figure 14.
Lockout
spring
Lockout cam and link
assembly
Adjustable
lockout lever
Operating
lever
Manual trip
lever
Lockout
lever
Operating lever
spring
Counter
Return spring
Lockout spring
lever
Spacer
Spacer
Figure 14 . View of head mechanism
Types V4L and V4E single-phase maintenance instructions
12
MAINTENANCE INSTRUCTIONS
MN280055EN May 2017