2205B0JE-DA-J-N_2014.05.
5 Maintenance and Inspection
Screw Compressor J-series
5.4 Disassembly and Assembly of the Compressor
5-33
Bearing
cover
1.
Remove the two upper hexagon socket head cap screws (M12×50, M12×70, and M20×70) and
attach safety bolts.
2.
Remove the rest of the hexagon socket head cap screws (M12×70, M12×50, and M20×70).
3.
To pull out the parallel pins, insert hexagon socket head cap screws (M12 and M20) into the
service holes and tighten the hexagon socket head cap screws so that the gap between the
bearing cover and the bearing head expands in parallel.
Even though screwing the forcing bolts evenly, when the gap between bearing cover and
bearing head does not open parallel and parallel pins are fixed unevenly, use a plastic hammer
to adjust the gap evenly.
If the parallel pins are not pulled out, use a slide hammer.
4.
Using the lifting equipment, remove the bearing cover.
5.4.9.3 Precautions for Installation
O-ring
(P300/P375/P480)
1.
After disassembly, replace the existing O-rings with new ones.
Oil
seal
1.
With the lip of the oil seal facing down, set the
oil seal on the retainer for oil seal.
2.
Using an appropriate tool such as a plastic
block, insert the oil seal fully into the retainer
for oil seal by tapping.
Oil seal sleeve/oil seal/retainer for oil seal
1.
Lubricate the oil seal sleeve with lubricant.
2.
Insert the oil seal sleeve into the retainer for oil seal.
3.
Attach eyebolts (M8) to the retainer for oil seal and install both the retainer and the oil seal sleeve
as an assembly into the bearing cover.
4.
When installing the retainer for oil seal assembly into the bearing cover, face the cutout of retainer
upward and align the cutout of retainer to the spring pin on the bearing cover.
Mechanical seal assembly
1.
Install the mechanical seal ring by aligning the hexagon socket set screw positions and the drilled
holes of the male rotor shaft.
