TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 4-31. OIL PRESSURE REGULATOR AND RELIEF VALVE REPLACEMENT (Cent) b. Repair (1) Regulator Valve WARNING Firmly secure spring during removal. A spring loaded mechanism ejects parts at high speed If released In injury may result. (a) (b) Clamp regulator assembly in a vise with soft jaws. Compress spring (13) and remove retaining pin (14) from regulator body (15). .Remove spring seat (16), spring an uncontrolled manner. Personal (13), and valve (17) from regulator body (15). WARNING 13 16 (2) Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding - and personal protective equipment (goggles/ shield, gloves, etc). (c) (d) (e) (f) (9) (h) Clean all parts with fuel oil and dry with compressed air. Inspect parts for wear and damage. Regulator valve must move freely in valve body. Replace valve and valve body if parts are scored and cannot be cleaned with crocus cloth. Replace a pitted or fractured spring. Assemble valve assembly by first applying engine oil to outer face of valve (17) and slide it into regulator body (15), closed end first. Install spring (13) and spring seat (16) into regulator body (15). While compressing spring, install retaining pin Relief Valve WARNING (14) above spring seat (16). ● ● + . Firmly secure spring during removal. A spring loaded mechanism ejects parts at high speed If released In an uncontrolled manner. Personal injury may result. (a) Clamp relief valve assembly in a vise with soft iaws. CornDress.@rms(18 and 19) and ● . . remove retaining pin (20) f~om relief valve body (21). “ “ - ‘ ‘ (b) Remove spring seat (22), springs (18 and 19), two inner spring seats (23), and valve (24) from relief valve body (21 ). e 4-122