MNL-126509
April 4, 2013 Page 25
8. Remove the Pressure Plug (3) and take out the valve parts.
9. Clean the Intake Valve and Pressure Valve Assembly, preferably with an ultrasonic cleaner and
check for wear and damage.
10. Valve Seats and Valves must not show any signs of wear or damage. Replace damaged or worn
parts.
11. Clean the Valve Head. Check that the intake and pressure valve bores are in perfect condition.
12. Using a precision straightedge, check that the underside of the valve head is flat. If necessary use an
emery cloth and surface plate to smooth out the surface.
3.1.8.5 Reassembling the Valves of the 2nd Stage.
1. Replace the Intake Valve (6) using the special valve tool to tighten it.
2. Check the intake valve functions correctly by blowing compressed air through the valve in the
direction of flow.
3. Secure the intake valve as follows: (See Figure 3-14) Peen the valve head aluminum over the screw-
in thread of the intake valve in two places opposite one another. Use a small drift pin, approximately
5 mm in diameter.
4. Insert the O-ring (4) and the Pressure Valve parts(5).
5. Check the pressure valve function and stroke by lifting the valve parts.
6. Ensure the Stud (2) is unscrewed, then screw in the Pressure Plug (3)and tighten.
7. Screw the Stud (2) in firmly, fit a new gasket and secure it with the Cap Nut (1).
Figure 3-13 Using the Special Valve Tool Figure 3-14 Securing the Intake Valve
^ CAUTION
The intake valve plate and valve spring must not be jammed.
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