8
7.2 Inspection
▪
Spool valve assembly
Seal ring [Fig.7.5]
Measure the outside diameter of the seal ring, and if it is
outside the usable range, replace the Spool valve assembly.
If the seal ring is worn out or cracked, replace Spool valve
assembly.
Usable range of Seal ring
Part to measure A
φ
12.58 mm and over
Part to measure B
φ
17.88 mm and over
▪
Sleeve [Fig.7.6]
Measure the inside diameter, and if it is outside the usable
range, replace the Sleeve.
Usable range of Sleeve
Part to measure A
φ
12.66 -
φ
12.79 mm
Part to measure B
φ
17.96 -
φ
18.09 mm
▪
O ring, Packing
If the O ring is worn out or cracked, replace it.
<NOTE>
▪
Spool valve assembly and Sleeve must be replaced complete
set. Unable to replace individual component.
7.3 Installation
For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly.
Tightening torque for Valve body assembly attaching
5 N
･
m
<NOTE>
▪
Make sure there is no dust on the seal surface and it is not
damaged.
▪
Fill the packing mounting part of the spool with grease and
reinstall the packing.
8. Retightening of Tie rods
▪
The torque should be applied on the occasion of
(1) Right before the pump to use.
(2) There are any leaks of material on daily inspecting a
pump.
<
NOTE
>
▪
Tighten the bolts that balance should be equal from both
side on diagonal line with even torque.
▪
Retighten the Out chamber and then the manifold in this
order. [Fig.8.1]
Retainer bolts from the
out chamber
Retainer bolts from the
manifold
AN
10 N
･
m
AT
20 N
･
m
AH, AS
20 N
･
m 10
N
･
m
Fig.8.1
Fig.7.5
Fig.7.6