Thirteen in .NET

Painting QR Code ISO/IEC18004 in .NET Thirteen

Thirteen
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Figure 13.27 Removing cylinder.
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Corbin mortise locksets (7000, 7500, 8500 series) Troubleshooting
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Problem 1: With door open, latchbolt doesn t extend or retract freely. Check for binding against the rose. Adjust the knob. Loosen the roses or trim on the door. If the bolt now operates freely, the roses or trim must be realigned. A knob aligning tool is recommended. Check installation templates for proper position (Fig. 13.28). If the bolt does not operate properly with trim and roses loosened, remove the lockset from the door. If the lockset operates properly when removed from the door, use a chisel to make the mortise larger so the lockset enters freely. Problem 2: With door closed, latchbolt doesn t extend or retract freely or door won t latch at all. Open the door. If the latchbolt still doesn t operate properly, see Problem 1. Problem 3: Latchbolt stubs on the strike lip. Bend the strike slightly back toward the jamb. Wax or paraffin makes an excellent lubricant, as does silicone spray (Fig. 13.29). Problem 4: Deadbolt doesn t enter the strike. This is probably due to misalignment of strike and bolt, particularly in cases where door sag has taken place. Both latchbolt and deadbolt holes in the strike must be filed or the strike repositioned. Do not force the thumbpiece if the deadbolt doesn t extend and retract in the strike freely (Fig. 13.30). Problem 5: Removing the cylinder. Loosen the cylinder locking screws in the face of the lockset. If the scalp covers the set screws, remove the scalp. Unscrew the cylinder. When replacing, be sure the locking screws are firmly seated (Fig. 13.31). Problem 6: Key does not operate the latchbolt or deadbolt. Loosen the cylinder locking screws. The cylinder is in the wrong position in the door so the cylinder cam does not engage the locking mechanism properly. Turn the cylinder a whole turn to the left or right until it works properly. The keyway must always be in position to receive the key with bitting (notches) up. Tighten the cylinder locking screws. Problem 7: Key turns hard when retracting the deadbolt. If the bolt operates freely with the door open, check the bolt-strike alignment. Check the scalp to be sure it is not binding the bolt or that paint over the bolt is not causing the bind.
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Figure 13.28 Checking latchbolt.
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Figure 13.29 Bending strike.
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Figure 13.30 Filing strike.
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Figure 13.31 Removing cylinder.
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Thirteen
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Problem 8: Key works hard in the cylinder. Lubricate the cylinder with powdered graphite or place graphite on the key and move it back and forth slowly in the keyway. Never use any petroleum lubricants (Fig. 13.32). Problem 9: Key breaks in the lock. Remove the cylinder from the lock. Insert a long pin or wire into the back end (cam end of the cylinder). Move it back and forth until the broken key stub is forced out through the front of the cylinder. Clean the cylinder with ethyl acetate and lubricate it with graphite before reinstalling (Fig. 13.33). Problem 10: Thumbpiece trim doesn t retract latchbolt completely or doesn t extend bolt completely. Check for binding at inside trim; or, if the outside thumbpiece trim
is used in conjunction with the inside panic device, check to see if it is operating properly and is not dogged down. Remove the thumbpiece and check the position of thumbpiece in relation to the latch trip at the bottom of the mortise lock case. When properly installed, the top of the thumbpiece should be up against the bottom of the latch trip but not lifting it (Fig. 13.34). If the bolt doesn t retract fully when the thumbpiece is pushed down, the thumbpiece is too low on the door. Move the trim up as needed. If the bolt doesn t extend completely when the thumbpiece is released, the thumbpiece is too high on the door. Move the trim down as needed. If the trim is fixed and cannot be moved, carefully bend the thumbpiece tail up or down.
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