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39
Maintenance
01.4IB.50026A
proper rating and press the “CLOSE”
push button on the control box. The
mechanism will charge the main closing
spring and stop. Disconnect the control
cord from the power source before
proceeding.
With the main closing spring charged,
turn the latch adjusting screw upwards
until the latch is released and the
grounding switch closes. Unscrew the
adjustment screw 2½ turns and lock
in position with the locking nut. The
latch adjusting screw is accessible from
beneath the ground and test device
through a clearance hole in the base
pan. The locking nut is accessible from
above the base pan, on the left side of
the main mechanism.
After completing the adjustment of the
close latch, reconnect the closing coil.
4) Electrical Operation
After any necessary mechanical
maintenance and lubrication is done,
operate the ground and test device
electrically several times to ensure that the
electrical control system works properly.
Refer to
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1) Routine Maintenance
Lubricate the blades as shown in
Examine the contact areas, both moving
and stationary, for evidence of overheating,
pitting, cracking or other damage. Any
damaged parts should be replaced.
2) Moving Contact Adjustments
There are two factory adjustments of the
moving contacts which are described in this
section. No adjustment of these settings
is required for routine maintenance, but
they may need to be adjusted after major
overhaul or replacement of contact parts.
Do not adjust these settings unnecessarily.
a. Initial Kick-Off Spring Height
Adjustment
The initial height setting of the kick-off
springs is measured with the ground
making switch open. The height from
the back side of the impact snubber
and the insulating support is 21/₈”.
This height is adjusted by grasping
the impact snubber and turning the
1/₄-20 hex head bolt. Turning the bolt
clockwise will decrease the gap, and
turning the bolt counterclockwise will
