6-27
2. MAIN CONTROL VALVE
ASSEMBLY
General
Ensure that the assembly area will be clean and free of contamination.
Use a flat(within 0.2mm) work surface when bolting the valve sections together.
Use calibrated torque wrenches and instrumentation.
Additional auxiliary valve sections may be added to the main control valve in a similar manner as
indicated below.
Block subassembly
1)
(1)
Η
Θ
Ι
Κ
(
(
2)
Attach all the O-rings to the appropriate grooves between the spool sections.
Stack the valve sections such that all the work ports are facing up, the spool ends are all in the
same direction, and they are resting on a flat(within 0.2mm), uniform surface.
Insert all the tie rods through the drilled holes in each of the housings.
Press the sections together, being carefully not to damage sealing surfaces or seals.
Install nuts to both ends of all tie rods and progressively torque in a circular pattern until reaching
a torque of 2.4~2.9kgf
Â
m(17.4~21lbf
Â
ft) on all tie rods. Periodically, make sure that the valve
remains flat while applying torque.
Η
Θ
Ι
Κ
Λ
2.4~2.9 kgf m
.
(17.4~21 lbf ft)
.
NUT
22B7HS21
