Alfa Laval Contherm 6X11, Instruction Manual

Page: 90 / 124

8 Inspection & Maintenance
Table 8-23. Recommended Demineralizing Procedures
Cylinder Material Action
All Stainless Steels 1. Rinse.
2. Acid wash 2.0 to 2.2 pH, 120
°
F to 140
°
F (49
°
C to -60
°
C) for 30 to 45 minutes.)
3. Rinse.
4. Neutralize (Use a mild general cleaner).
5. Rinse.
Nickel 1. Rinse.
2. Acid wash (2.25 to 2.25 pH, 110
°
F to 120
°
F (43
°
C to -49
°
C) for 30 to 60 minutes.)
3. Rinse.
4. Neutralize (Use a mild general cleaner).
5. Rinse.
8.8 Hydraulic Pump and Stack Valve Assembly
Hydraulic pump fluid should be inspected, replenished and replaced at a frequency specified in the service manual (found in
appendix) for optimal life and reliability.
This remaining section provides the procedure for disassembling and reassembling the Contherms
™
Stack Valve Assembly
(P/N 7401305). The Rotor Lifting System’s Stack Valve Assembly is a hydraulic directional control valve used to lower or raise
the Contherms
™
rotor assembly. Compression fittings for both supply and return lines, along with fittings for connections to
the Contherms
™
hydraulic lift cylinder assembly, are located on the stack valve assembly. A detailed description of the Stack
Valve Assembly is provided in Chapter Five, Installation, and Chapter Six, Operation.
Figure 8-14 identifies all components of the Stack Valve Assembly and provides parts location information.
Maintenance of the Stack Valve Assembly consists of replacing the assembly’s O-rings. The Stack Valve Assembly can be
configured with either one or two center sections. Each center section contains a single handle for raising or lowering the
rotor assembly of a corresponding Contherm
™
.
The procedure for replacing O-Rings in the Contherms
™
Stack Valve Assembly is provided in Table 8-24. Refer to Figure 8-14
for parts location and identification information while performing this procedure.
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