160GR Natural Gas Booster Instruction Manual
Mayekawa all rights reserved. Subject to change without notice. Lat revised in October 2007
p.45
fix the cramp up to the specified torque, by gradually and evenly tighten them in diagonal.
If the bolts are tightened to the specified torque one by one, the cramp will not be fixed
evenly. Alternate to tighten the 4 bolts to reach the specified torque.
c
）
Attach the gasket. Join the unloader cover with the outer-rim of the unloader thrust
bearing cramp, and fix them with the hexagon socket head screws.
8.13 Mechanical Shaft Seal
a
）
Before installation, clean the area where the shaft seal will be installed. Especially, the
ribbed part of the seal ring (collar) of the mechanical seal needs to be checked for scars.
b
）
After the press fitting of the oil seal into the seal retainer, screw the eyebolt in the seal
retainer. Install them in the speed up gear casing cover. When installing the seal cover,
make sure the direction of the cover. The drain hole of the oil should be located on top.
Make sure the cut area of the seal retainer reaches all the way to the pin by moving the
seal retainer to the left and right with the eyebolt.
c
）
Insert the seal cover
“
O
”
ring (49). This
“
O
”
ring tends to be forgotten. Make sure it is
inserted.
d
）
Install the sleeve for the oil seal. Make sure it is all the way in, and tighten it with fixing
screws.
e
）
Install the shaft seal assembly. Push the
“
O
”
ring in without damaging it. There are fixing
screws on the seal collar. Tighten them with the dent position of the shaft. While paying
attention to the sealed end face, push the seal ring to check the direction of the shaft
’
s
movement.
f
）
Install
the
“
O
”
ring and
静止環
on the seal cover. Attach the seal cover gasket to the
seal cover, keeping it at the 90 degree to the shaft. When installing the seal cover gasket,
join the
給油孔
position of the seal cover and speed up gear casing cover with the
notched area of the gasket.
g
）
When the seal ring and the fix ring of the mechanical seal come in contact with each
other, there will be the spring force. While holding the seal cover from behind the rings,
gradually and evenly tighten 2 bolts in diagonal first. Then, tighten the rest of the bolts.
9. Procedures to Adjust End Clearance
I. When the end clearance is beyond the specified value
It means that the moving distance of the rotor is too big, when the thrust bearing is tightened
by the bearing cramp. Shorten the moving distance by following the instructions below.
a
）
One way to do it is to adjust the thickness of the thrust adjusting washer by the surface
grinding.
When conducting the surface grinding, use a high-precision surface grinder to make sure
the parallelism is maintained. After the grinding is completed, check the parallelism by
measuring the thickness of the washer all around with a micrometer.
b
）
Another way to do it is to insert a shim with the right thickness between the thrust bearing
spacer and the outer-ring of the bearings. The thickness of the shim is, as in the first
method, determined by the difference between the actual measurement and the
