TM 5-3805-261-20 HORN AND BACK-UP ALARM MAINTENANCE. 7-105. Back-up Alarm Switch.  (Sheet 1 of 4) This task covers: a. Removal b. Cleaning c. Inspection d. Installation INITIAL SETUP: Applicable Configurations Personnel Required All Construction equipment repairer MOS 62B Tools General Mechanic’s Tool Kit: Automotive (NSN 5180-00-177- Reference 7033) TM 5-3805-261-10 Snap ring pliers 7/8" open end wrench, cut to Special Environmental Conditions 4-3/4" long. None Test Equipment None General Safety Instructions None Materials/Parts Dry cleaning solvent, Torques Item 14, Appendix C Except for special torques shown, Clean cloths, Item 39, all fasteners are tightened to Appendix C standard torques.   Refer to Small tags, Item 41, Appendix E. Appendix C Thread sealant, Item 60, Appendix C Troubleshooting References None Equipment Condition TM 5-3805-261-10 Vehicle parked on level ground. Parking/emergency brake applied. Equipment lowered to the ground. Engine stopped. Master disconnect switch off. Paragraph 7-112 Disconnect positive cable on right side. Paragraph 13-15 Operator’s panel console sides removed. Go to Sheet 2 7-255