MVT26
October 2003 Section 3 Page 25
3.1.5.5 Changing the 2nd and 3rd Stage Valves
See Figure 3.1-12
3.1.5.5.1 Removal Procedure
1. Unscrew and remove hex nut (1).
2. Remove cap holder (2).
3. Insert two screwdrivers into the extraction grooves (4) of the valve caps (3) and lift out the valve caps
with O-Rings (5).
4. Check and replace O-Rings if required.
5. Take out valves (6 & 9).
6. Check the valve gaskets (7) and replace if required.
3.1.5.5.2 Installation Procedure
1. Fit valves(6 & 9) with gaskets (7) and replace.
2. Fit valve caps (3) with O-Rings (5) and replace.
3. Replace cap holder (2) in the proper position.
4. Screw on hex nut (1) and tighten with a torque wrench to the torque value listed in the Appendix.
Figure 3.1-12 2nd and 3rd Stages Valve Heads and Valves
1. Hex Nut
2. Cap Holder
3. Valve Caps
4. Extraction Groove
5. O-Rings
6. Inlet Valve
7. Valve Gaskets
8. Valve Head
9. Discharge Valve
CAUTION
The valve cap for the inlet valve protrudes 0.98 in (2.5 mm) out of the valve head more than the valve cap
for the discharge valve. The cap holder is designed accordingly.