Closing Spring Removal; Lubrication; Method For Cleaning Bearings - Siemens FCV-500 Instructions Manual

for loose connections and frayed or damaged insulation. The "close latch check switch", "trip
latch check switch" (if possible), and "mechanical interlock" switch should be checked for
mounting tightness. The satisfactory operation of each switch element should be assured with a
continuity meter and manual manipulation of the switching element, and adj usted if necessary.
10, 000
After operations, the operating mechanism should be given a general overhaul and all
wom parts replaced. Excessive wear will usually be indicated when adjustments can no longer
be satisfactorily made. The general overhaul will require disassembly of the operating mechanism.
All bearings and surfaces receiving wear should be examined carefully and relubricated in
accordance with lubrication instructions which follow.

Closing Spring Removal

The removal of closing springs will be necessary in order to pennit general overhaul of the
breaker. These springs may be removed as described on Page

Lubrication

NOTE: The lubricant supplied with the accessories is intended to be used exclusively on the
contacts and must not be used on any part of the circuit breaker mechanism.
Recommended circuit breaker lubrication points are shown in Figure 4a and
18)
(Fig. outlines two methods of lubrication. Refer to this chart for recommended lubricant and
points of application. The first method requires no disassembly and is suggested for the prevention
of problems which could be created by severe environmental or operating conditions.
The second method follows procedure similar to that performed on the breaker at the factory.
Follow this procedure only in case of a general overhaul or disassembly.

Method for Cleaning Bearings

Needle and roller bearings are factory lubricated for life and should not require attention.
However, the best of greases are affected by time and atmospheric conditions and may require
service.
To lubricate these bearings when parts are disassembled, the following procedure is recommended.
Clean in solvent, wash in alcohol, spin in light machine oil, drain and repack with Beacon
P-3 25 grease.
DO NOT REMOVE NEEDLE BEARINGS FROM
THE RETAINING PART
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10.
17.
The chart