Blohm + Voss Oil Tools GraySpin Mark 40, Technical Documentation Manual

Page: 24 / 64

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24
Drive Rollers
To remove one or both of the drive rollers
the following procedure should be used:
1. Remove chain (See Chain Removal)
2. Remove one or both pressure arm
assemblies. This is accomplished by
removing the locking capscrew and pulling
the cylinder pin. (Review the pipe size
adjustment in The Installation Section)
Remove arm pivot pin and arm.
3. Remove top and bottom bearing caps of the drive
rollers by unfastening the (8)
1/2
” hex head capscrews.
The bearing caps, drive roller, shaft and sprocket are
ready to be removed.
4. Remove the lowest snap ring from the shaft. It is not
necessary to remove the sprocket. The drive rollers are a
light press fit on the shaft. Press the bottom of the shaft
down through the drive roller. If a press is unavailable
(field repairs) use a large diameter brass punch and tap
the shaft through the pressure roller.
5. To install new drive rollers reverse the above procedure. Prior to installation of the rollers
on the drive-shaft, liberally coat both surfaces with an anti-seize compound.
Idler Sprocket
Removal of the idler sprocket assembly is accomplished as
follows:
1. Remove the chain (see Chain Installation)
2. On the Mark 10, the valve-to-motor hose should be
disconnected from the motor and positioned rearward away from
the sprocket.
Figure 14
Figure 15
Figure 16