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Manual abstract: user guide MARES MR 22DEALER MANUAL
Detailed instructions for use are in the User's Guide.
[. . . ] DEALER MANUAL
FIRST
STAGE
D MR 22 FIRST STAGE SERVICE
· Disassembly
1. Remove all hoses from the first stage except the hose attached to the DFC port (port equipped with depressor) and replace with port plugs. Remove the hose protector (46) using two wrenches (817) unscrew the hose (26) from the second stage (Fig 12).
46
FIG. Remove the first stage cover (81-71-76-80) using hex wrench (83) (Fig. [. . . ] Place the poppet spring (8) over the poppet stem. Insert new backup ring (5) into poppet retainer (4). Insert o-ring (6) into poppet retainer (4). Place poppet retainer (4-5-6) in position over spring. Place o-ring (71) on first stage cover (81). Press locking head (80) into spring (76). Insert the locking head and spring in the first stage cover.
NOTE
THE LOCKING HEAD MUST BE FACING THE OPEN END OF THE FIRST STAGE COVER. A SMALL PLASTIC ROD CAN BE USED TO PRESS THE LOCKING HEAD AND SPRING INTO THE FIRST STAGE COVER (FIG 21).
12. Install first stage cover and tighten with hex wrench (83). Insert the poppet pin (12) through the center hole in the first stage body. Place the poppet button (13) over the poppet pin and depress it a few times to ensure that the poppet will move freely. Insert first stage disassembly tool (85) into a 3/8" LP port. Place spring base plate (15) on diaphragm. Place shock ring (69) onto retaining nut (17).
FIG. Lightly lubricate the sealing edge of retaining nut (17) and tighten into the first stage body until snug , (19-22 Ft/lb. Lightly lubricate the base of the diaphragm spring (16) then place it on the base plate. Place the regulating nut (18) over the diaphragm spring. Using tool (813) tighten regulating nut 2-3 turns.
NOTE
DO NOT OVER TIGHTEN REGULATING NUT. THIS WILL CAUSE INTERMEDIATE PRESSURE TO INCREASE AND INTERFERE WITH LATER ADJUSTMENTS. Place o-ring (71) on yoke retainer nut (7). Place filter spring (61) into yoke retainer nut. Place the sintered filter (22) onto the filter spring. [. . . ] Expand the clamp ring until it will slide over the flange of the second stage body. Place the second stage diaphragm on to the second stage body making sure the metal disk is against the demand lever. Position the clamp ring over the flange of the second stage and the flange of the purge cover. Rotate the clamp ring so the split end is facing the second stage hose. [. . . ]
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