5-10. Engine Installation

TM 5-4940-228-14 5-10. Engine Installation (Fig. 5-1). a. If a new engine is used, prepare it as follows: (1) Refer to TM 5-2805-257-14 and depreserve as instructed, install nipple and fuel filter. (2) Install deflector (20) on engine (21) ex- haust flange with two each bolts (19), washers (18) and nuts (17). (3) Bolt front bracket (15) and rear bracket (16) on to engine (21) by using twelve each bolts (13) and washers (14). (4) Rotate engine (21) shaft until key way is up, insert key (11), slide sheave (9) and bushing (10) on to engine (21) shaft. Start bushing bolts, but do not tighten. b. Place engine (21) over mounting slots on plat- form (70), install four bolts (7), washers (6), and nuts (5). Do not tighten nuts since engine (21) will require movement during alignment. c. Push engine (21) towards compressor (35), place both belts (8) over compressor (35) and engine (21) pulleys, Pull engine (21) back, away from com- pressor (35), to put tension on belts (8). Snug any two mounting bolts (7) to prevent engine (21) from moving. d. Align engine sheave by loosening both bush- ing (10) bolts and sliding sheave to line up with compressor pulley. Tighten both bushing bolts. e. Hold engine (21) back, away from compressor (35), while tightening all four bolts (7) and nuts (5). Correct belt tension is 3/8 to 5/8 inch (1 to 1.5 cm) depression in the center of each belt (8) when de- pressed with your thumb with a moderate pressure (about 20 lbs) (9 kg). f. Attach fuel line (12) to engine (21), clamp fuel line (12) to rear engine mount (16). g. Place belt guard (4) on platform (70) and line up mounting holes. Install and tighten two bolts (2) and four nuts (1). 5-11. Removal of Compressor (Fig. 5-1). a. Remove belt guard (4) by removing four nuts (1) and two bolts (2). Lift belt guard (4) off platform (70). b. Loosen nuts (5) and bolts (7) on bottom of en- gine (21) brackets (15 and 16), Slide engine (21) to- wards compressor (35) and remove both belts (8). c. Remove unloader pilot line (27). d. Loosen all three pulsation chamber (57) nuts (53) and bolts (55) four or five turns. e. Remove compressor (35) mounting nuts (32) washers (33) and bolts (34). f. Disconnect union (28) nut between compressor (35) and pulsation chamber (57). Remove com- pressor (35) from platform (70). 5-12. Compressor Installation (Fig. 5-1). a. Place compressor (35) over mounting holes on platform (70), line up union (28) and hand tighten union nut. b. Install and tighten compressor (35) mounting bolts (34) and washers (33) and nuts (32). c. Tighten pulsation chamber (57) mounting bolts (55) and nuts (53). Tighten union (28). d. Install unloader pilot line (27). e. Install belts (8) on to engine (21) sheave and compressor (31) pulley. f. Pull engine (21) back away from compressor (35) while tightening all four engine (21) mounting nuts (5) and bolts (7). Correct belt tension is 3/8 to 5/8 inch (1 to 1.5 cm) depression in the center of each belt (8) when depressed with your thumb with a moderate pressure (about 20 lbs) (9 kg). g. Place belt guard (4) on platform (70) and line up mounting holes. Install and tighten two bolts (2) and four nuts (1). 5-6