Chapter 5 Maintenance and Inspection
UD-series Screw Compressor
5.5 Reassembly
5-63
shaft, push the inner ring of the bearing.
Otherwise, the bearing may be damaged.
Push into
the stepped part of the indicator cam and use the stop ring to prevent it from coming off.
If the
outer diameter of the indicator cam is larger than the inner diameter of the bearing retainer,
install the bearing retainer before installing the bearing.
b
）
Install the oiled V-ring on the unloader cover.
One ring of the V-ring set is made of rubber for
better sealing.
Insert the tip of the V part of the V ring into the unloader cover.
c
）
Assemble the spring and spring retainer. Insert the indicator camshaft assembled in a) into the
V-ring and tighten the ball bearing to the unloader cover with the bearing retainer.
d
）
Make sure that the cylindrical cam rotates smoothly, and then attach the "O" ring (part number
75) to the unloader cover.
e) With the unloader push rod in the unloaded position, align the groove of the indicator cam with
the pin of the push rod and push in the unloader cover to assemble.
Tighten the unloader
cover with the oil port for unloader operation facing up and tighten it with the hexagon socket
head cap screw to fix it.
Figure 5-27 Development view of the Unloader cover
№
Part name
Q’ty
74
Unloader Cover
1
75
"O" ring
1
76
Hexagon socket head cap screw
8
77
Unloader indicator cam
1
78
Ball Bearing
1
79
Retaining Ring
1
80
Thrust Bearing Gland Spacer
1
81
Hexagon Socket Head Cap Screw
3
82
V ring
1set
83
Spring
1
84
Spring Retainer
1
597
Spring Washer (type 400)
3
