TM  10-3930-638-24&P 3-31.   MAST   ASSEMBLY   MAINTENANCE a.  Carriage  Assembly. This task covers: a.  Removal b.  Disassembly c.  Cleaning PERSONNEL  REQUIRED Two  maintenance  technicians INITIAL  SETUP TOOLS Chain Hoist, 1/2 ton capacity Bar, 2 inches diameter Bar,  1-1/2  inches  diameter Bore Gage, zero to 4 inches Micrometer, zero to four inches Automotive Mechanic’s Tool Kit NSN 5180-00-754-0641 Hard Wooden Blocks (2), 4 by 4 by 12 inches MATERIALS/PARTS Cleaning  solvent  P-D-680 Clean cloths d.  Inspection/Repair e.  Reassembly f.  Installation/Replacement EQUIPMENT   CONDITION Paragraph Condition   Description Engine off, parking brake applied, and carriage assembly raised four inches (approximately) from ground and se- curely  blocked. 2-56c Forks  removed. 2-56e Side shift chains disconnected from carriage assembly. 3-248  CHANGE  2