Assessments - 3, GPA: 3.7
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Release pressure. The Fuse Holder will be flush with the rim of the Fuse Holder Socket. REV 10b Troubleshooting Problem Possible Causes Likely Solutions Motor and Electrical Lathe will not start or a breaker trips on startup. Cord not connected.1. No power at outlet. 2. Fuse has blown. 3. Chuck Guard safety interlock not 4. in place. PC Board (182) faulty.5. Power Switch (178), Forward/6. OFF/Reverse Switch (181) and/ or Speed Control Knob (180) not working. Internal damage or wear. (such 7. as wiring or motor.) Check that cord is plugged in.1. Check power at outlet. If outlet is unpowered, 2. turn off tool and check circuit breaker. If breaker is tripped, make sure circuit is right capacity for tool and circuit has no other loads. Check for short, replace fuse (see Maintenance 3. section of this manual). Rotate Pin (251) so it seats in Plate (252). 4. Inspect PC Board, have replaced if needed.5. Check and replace as needed. 6. Have technician service tool.7. Lathe stalls. Incorrect workpiece material 1. (metal). Drive Pulleys slipping on shaft.2. Removing too much material per 3. pass. Use metal suited for Lathe. 1. Tighten or Replace Pulleys (27,148).2. Remove less material per pass.3. Lathe operates slowly. Extension cord too long or wire size too small. Eliminate use of extension cord. If an extension cord is needed, use shorter/heavier gauge cord. See Extension Cords in GROUNDING section. Performance decreases over time. Accessory dull or damaged. 1. Carbon Brushes (318) worn or 2. damaged. Keep cutting accessories sharp. Replace as 1. needed. Replace Carbon Brushes (See Maintenance 2. section of this manual). Excessive noise or rattling. Pulley setscrews missing or 1. loose. Motor fan hitting cover.2. Belt (if equipped) too loose 3. (slipping) or too tight (bearing damage). Internal motor damage or wear. 4. Check Pulley keys and setscrews. Replace or 1. tighten as needed. Tighten fan cover or replace as needed.2. Properly tension belt. 3. Have technician service tool.4. Follow all safety precautions whenever diagnosing or servicing the tool. Disconnect power supply before service. REV 10b Problem Possible Causes Likely Solutions Overheating. Motor overloaded. 1. Forcing machine to work too fast.2. Accessory dull or damaged. 3. Incorrect RPM or feed rate. 4. Gear setup is too tight, gears 5. bind. Blocked motor housing vents. 6. Motor being strained by long or 7. small diameter extension cord. Reduce load on motor. Loosen drive Belt (see 1. Maintenance section of this manual). Allow machine to work at its own rate.2. Keep cutting accessories sharp. Replace as 3. needed. Check that RPM feed rate chart for appropriate 4. rates for operation. Adjust gears so there is a small amount of play 5. and the gears move freely and smoothly when the Chuck is rotated by hand. Wear ANSI-approved safety goggles and NIOSH-6. approved dust mask/respirator while blowing dust out of motor using compressed air. Eliminate use of extension cord. If an extension 7. cord is needed, use one with the proper diameter for its length and load. See Extension Cords in GROUNDING section. Tool Performance Whole unit vibrates excessively while in use. Workpiece unbalanced.1. Loose or damaged belt(s).2. Drive Pulleys not aligned.3. Worn or broken gear.4. Chuck loose or unbalanced. 5. Spindle bearings worn.6. Re-center workpiece.1. Tighten or replace the belt. 2. Align Drive Pulleys (27, 148).3. Inspect gears and replace if needed.4. Tighten Nuts (6) or have a qualified technician 5. rebalance Chuck. Have a qualified technician replace bearings.6. Uneven surface finish. Incorrect RPM or feed rate for 1. job. Dull or incorrect tool for job.2. Gibs need adjustment. 3. Tool positioned too high.4. Adjust RPM and/or feed rate. 1. Sharpen and/or change tool.2. Tighten Gibs (99 and/or 106) (See Gib 3. Adjustment in Maintenance Section). Lower position of tool.4. Unable to remove tapered tool from Tailstock. Quill not fully seated in Tailstock or taper was inserted without first removing debris. Turn quill handwheel until taper is forced out of quill. In the future make sure that the quill is fully seated in the tailstock and that the tool is wiped free of debris before installing. Cross Slide, Compound Slide and/or carriage feed do not move smoothly. Gibs need adjusting. 1. Handwheel or crank handles are 2. too loose. Leadscrew worn or needs 3. adjustment. Loosen or tighten the Gib screws (99 and/or 106) 1. (See Gib Adjustment in Maintenance Section). Tighten Handwheel and/or crank handle. 2. Tighten Leadscrew fasteners or have lead screw 3. replaced by a qualified technician. Follow all safety precautions whenever diagnosing or servicing the tool. Disconnect power supply before service. REV 10b Problem Possible Causes Likely Solutions Difficulty moving Cranks of Cross Slide, Compound Slide and/or Carriage Handwheel. Debris jammed around Gibs. 1. Gibs adjusted too tight. 2. Bedways need lubrication.3. Remove Gibs, clean Gibs and all adjacent are...