71 |
PRESSURE CONTROL VALVE
(REF# 70)
74 |
78 |
73 | 76 | 79 | 75 | 77 | 80 | 81 |
85 |
82 | 84 |
83 |
TOOLS REQUIRED -1" wrench
1.Remove pressure control knob, (ref# 71) and pull P.C. stem, (ref# 74) out to the internal stop (1/16" to 1/8") thereby releasing hydraulic pressure.
2.Remove hydraulic return line, (ref# 69) from P.C. fitting, (ref# 78).
3.Place 11/16" wrench on P.C. seat, (ref# 83). Turn
4.Place complete valve in vise and remove seat from body, (ref# 79).
5.Remove ball, (ref# 84), retainer, (ref# 82), and spring, (ref# 80) from body. Inspect ball for nicks or cuts and replace if damaged. Inspect seat at sealing edge, for signs of wear. A good condition seat will have a very small beveled at the sealing edge. The larger the bevel the more wear has taken place. Inspect retainer for wear. The retainer has a small locating hole in it. The hole should be flush or slightly beveled. The greater the wear on the ball, seat, and retainer the poorer the static pressure will be. Replace parts individually, or use repair kit, (ref# 85).
6.Hold P.C. body vertical. Place spring into body, place retainer onto spring. Ensure retainer fits completely over spring. Retainer should rest below end of body by approximately 1/4" to 3/8". Place ball onto retainer, ensuring ball is located on center hole.
7.Thread on seat, using care not to dislodge the ball from its position on the retainer. Tighten firmly.
8.Apply pipe dope or Teflon tape to exterior threads of seat. Install into elbow. Tighten to prevent leaks and return to original position.
9.Reattach hydraulic line.
10.See "PURGING" instructions on page 16.
H.E.R.O. INDUSTRIES LTD. | 25 | 1100MD OWNERS MANUAL - “B” VERSION |
