TM 5-4310-451-14 5-15.  ENGINE AND AIR COMPRESSOR REPLACEMENT. This Task Covers: a Removal b Installation Initial Setup: Equipment Conditions: Equipment Conditions (Con’t): • Batteries disconnected (see paragraph 4-60) • Ether line disconnected from blower inlet tube (see • Wheels chocked paragraph 5-14). • Engine coolant drained (see Lubrication Instructions, • Tachometer drive disconnected at engine (see Chapter 3, Section I) paragraph 4-77). • Center roof panel removed (see paragraph 5-85) • Governor linkage removed from governor and air • Radiator housing side braces removed (see para- compressor (see paragraph 4-40). graph 571) • Discharge temperature switch disconnected from • Lift bail removed (see paragraph 5-97) air compressor discharge housing (see paragraph • Center bottom cover removed (see paragraph 4-81) 4-79). • Rear bottom cover removed (see paragraph 4-81) • Air compressor discharge temperature lead discon- • Fuel tank-to-engine fuel line removed (see paragraph neted (see parag 4-34). • Pressure regulating valve removed  (see para- • Fuel return line removed (see paragraph 4-37) graph 4-87). • Radiator hoses removed (see paragraphs 4-49 and • Air compressor main oil filter lines disconnected 5-105). (see paragraph 4-101). • Alternator electrical lead disconnected (see para- • Air compressor disconnected from oil separator graph 4-51) (see-paragraph 5-102). • Starter electrical lead disconnected (see paragraph • Fan assembly removed (see paragraph 4-47). 4-54). Materials/Parts: • Engine temperature gage line removed (see para- •   Four locknuts graph 4-77) • Cold stop valve leads disconnected (see para- Tools/Test Equipment: graph 4-49) • General mechanic's tool kit • Engine fuel stop control solenoid disconnected (see • Field automotive shop set paragraph 5-66) • Suitable lifting device • Governor control assembly line disconnected (see paragraph 4-40) Personnel Required: Three • Emergency stop cable disconnected from engine governor (see paragraph 4-39) a. REMOVAL CAUTION Engine and air compressor must be removed as a complete unit.  If engine and air compressor are separated before removal, major damage to engine, air compressor, and trailer can result. 1. Position suitable lifting device over engine (2) and air compressor (1).  Attach lifting sling to engine and around air compressor.  Take up slack in lifting sling and lifting device. 2. Remove two locknuts (8) from screws (3) at front engine mounts (5).  Discard locknuts. 5-18