Zephyr ZGS-11000-2 v2 Operation And Maintenance Manual page 27

Manual RHGSE Operation and Maintenance Manual
7.10) Vertical drive belt replacement
Lower the lower capstan head enough that the vertical drive belt can be removed and replaced.
7.11) Drum drive belt adjustment
Loosen the two screws, located underneath the base, which hold the
Anglegear assembly to the base. Turn the drum belt adjusting screw so as to
tighten the drum drive belt, such that a small deflection of approximately 1/16
an inch is obtained with moderate hand force.
7.12) Drum drive belt replacement
Loosen the two screws that hold the Anglegear assembly to the base. Turn
the drum belt adjusting screw so as to loosen up the drum drive belt to
remove and replace.
Loosen these screws to adjust or replace the
drum drive belt
7.13) Adjustable platen adjustment
In order to accommodate the variation in speed of the cable as it wraps in the Rotatub and around the Spooler a
simple clutch is used. If the clutch is too tight the cable will ride up the spooler too quickly and may come out of
the Rotatub. If it is adjusted too loose then the cable will back up in the Rotatub and not wrap up on the spooler
properly. In addition, if the cable is wrapped too tightly around the spooler it cannot relax in the Rotatub thus
trapping the twist between the RHGSE and the Rescue hoist.
The above pictures show that as the cable is wrapping at the bottom of the spooler it is going at maximum speed
V3 which is above the speed as it is coming off the capstans -V1. As the cable starts to climb up on the spooler
it starts to slow down due to the reduced diameter V2. However, cable speeds V3, and V2 must be equal to V1
to collect the cable and not allow it to back up in the Rotatub. Therefore, the adjustable platen is slipping the
most when the cable is at the bottom of the spooler. If the platen slips at too high a torque the cable will ride up
the spooler and may come out from under the large guide roller.
This manual contains proprietary information and is not to be copied or disclosed without written permission from Zephyr International LLC
Rotatub
Copyright 2002-2015
ZOM-11000-2 v2 Rev G
Drum drive belt adjusting screw
AngleGear Assembly
Spooler
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