Quantcast 4-15.  RELIEF VALVE ASSEMBLY REPLACEMENT

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4-14.  TRIGGER ASSEMBLY REPLACEMENT
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TM-9-5130-338-12P Forward Repair System (FRS) Model M7 Manual
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4-16.  RELIEF ADJUSTMENT SCREW REPLACEMENT
TM 9-5130-338-12&P 4-15.  RELIEF VALVE ASSEMBLY REPLACEMENT. This task covers: a.  Removal b.  Inspection c.  Installation INITIAL SETUP Tools Equipment Conditions Tool kit, general mechanic's (SC 5180-90-CL-N26) Hydraulic impact wrench disconnected from power Wrench, 1-1/2-in.-comb (5120-00-227-8834) source. Hydraulic impact wrench secured in vise with soft-jaw Materials/Parts caps; impact head assembly facing upward. Cloth, cleaning (Appx. C, item 5) Trigger assembly removed (see para. 4-14). Oil, lubricating (Appx. C, item 13) Packing, preformed (Appx. F, item 5) Packing, preformed (Appx. F, item 8) Solvent, dry-cleaning (Appx. C, item 16) a. Removal. WARNING Exercise  extreme  care  when  removing  spool  cap  (1)  due  to  spring  force.    Injury  to  personnel could occur if spring force is released quickly. 1.  Remove needle roller (2), spool cap (1), and two preformed packings (3 and 4).  Discard preformed packings. NOTE Do not attempt to remove valve sleeve (5). 2. Remove valve spool (6), relief seat (7), relief poppet (8), two springs (9 and 10), and spring rest (11) from main housing (12). b. Inspection.  Inspect valve spool components in accordance with paragraph 4-19. c. Installation. CAUTION Damage  to  equipment  could  occur  if  valve  spool  components  are  not  alined  properly  during Installation. 1. Insert relief seat (7) into valve spool (6) until notches in relief seat engage strut of valve spool. 2. Install spring (10), spring rest (11), spring (9), relief poppet (8), and valve spool (6) with relief seat (7) in main housing (12). 3. Lubricate two new preformed packings (3 and 4) with clean lubricating oil and install preformed packings. 4-14

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