MNL- 0345
Page 24 Section 3 Base Edition
6. Observe the correct sequence when reassembling.
7. After finishing all maintenance work on the valves, turn the compressor manually using the flywheel
and check whether all items have been correctly installed.
8. 30 minutes after restarting the compressor, stop the unit, let it cool down to ambient temperature, and
retighten valve studs and cap nuts. Otherwise the gasket set may cause a leak.
9. Remove and check the valves every 1000 operating hours.
10. Replace the valves every 2000 operating hours to avoid fatigue failure.
11. Use an assembly tool (BAUER P/N: 011365) for all work on valve heads (See Figure 3.1-15).
3.1.5.4 Changing the 1st Stage Valves.
See Figure 3.1-11
3.1.5.4.1 Removal Procedure.
1. Unscrew and remove cap nuts (4) and washers (3).
2. Remove Valve Head Assembly (1) from studs in cylinder.
3. Remove Valve (2) and unscrew and remove center screw (6) and washer (5).
3.1.5.4.2 Installation Procedure
4. Fasten new Valve (2) with center screw (6) and washer (5).
5. Place assembled Valve Head (1) on studs in the cylinder.
6. Install washers (3) and cap nuts (4) and tighten to the torque value listed in the Appendix.
Figure 3.1-11 1st Stage Valve and Head
1
2
3
5
6
3
4
3
4
3
4
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