Maintenance
and Lubication of 300 Series Strikes
Under normal usage the 300 electric strike
should be cleaned and lubricated once a year to maintain
its reliability. In applications with high usage or
dirty conditions, more frequent service may be necessary.
Lubrication points are identified in the illustration.
When servicing a 300, inspect the internal parts for
excess wear for breakage and lightly lubricate per the
instructions. Lubricate with HPG
Grease , available here.
Note: Never lubricate
any strike with oil, such lubrication collects dirt
and forms an abrasive and sticky compound that may affect
the function of the strike.
To Inspect and Lubricate the Strike: |
1. Remove the strike from the face plate, held on by
two (2) 12-24 x 3/8 HEX WASHER HEAD CAP SCS
2. Remove the upper, held on by two (2) 4-40 x 3/16
PHMS. Removal of the upper cover should be done
slowly because the locking cam spring may snap out of
place. Also, care should be taken to insure that
the locking cam spacer and locking lever spacer are
not lost.
3. Remove the cam spring spacer, cam spring and locking
lever spacer.
4. Loosen the two (2) 6-32 x 1/8 SSSC holding the solenoid,
then remove the solenoid and locking cam.
5. Remove the locking lever spring and locking lever.
In some versions of the strike, there is a recess in
the locking lever and the case for this spring.
In cases with the recess, the locking lever spring must
be compressed into the lever before it can be removed.
6. Lubricate the area in the case where the locking
lever and locking cam est. NOTE:
Do not get any lubricant on the solenoid or switches.
Lubricate the cam pin and lever pin.
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7. Check the locking angle of the keeper
and locking lever for wear. Replace the keeper
and/or lever if worn. If the keeper is disassembled
for replacement or adding of a switch, lubricate the
keeper pin.
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8. Reinstall the locking lever and a
new locking lever spring. Caution: Make sure the
locking lever spring is placed back into the recesses
of the locking lever and the case.
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9. Check the solenoid, plunger and plunger
guide for excess wear, dirt, grime or oil. If present,
wipe clean. FAIL-SAFE:
Remove the retaining ring for inspection of the plunger
guide. Reassemble the solenoid and plunger with
a new retaining ring NON-FAIL-SAFE:
Lubricate the bottom edge of the locking cam (contact
points of the solenoid plunger). |
10. NON-FAIL-SAFE:
Lubricate the slot in the locking cam.
FAIL-SAFE:
Lubricate the bottom edge of the locking cam (contact
point of the solenoid). |