Zephyr ZGS-11000-2 v2 Operation And Maintenance Manual page 15

Manual RHGSE Operation and Maintenance Manual
Caution: Failure to stop the hoist before the hook comes out of the Rotatub may cause
damage to the RHGSE and the wire rope. Pay close attention to the number of turns in the
Rotatub as the hook approaches the up limit position.
6.8) Adjusting the load
Reeling in (retracting) under maximum load
If a maximum load is desired turn the Load Adjuster clockwise until the
RHGSE just starts to lift off the ground and then back off the adjuster 1/16
of a turn. Do not operate the RHGSE with it lifted off the ground. Always
place one foot on the RHGSE when adjusting to a high load.
Using Load Indication System
The load indication is for reference only
A load cell is included in the system to allow the operator to monitor and
adjust the load applied to the rescue hoist cable.
Load adjuster
The maximum load the RHGSE can apply to the wire rope is a function of its own weight and
any additional ballast weight that may be added such as when the Rotatub is full of water. The
RHGSE weighs 580 lbs (264 kg) when it is dry, it will start to lift off the ground at approximately 580
lbs (264 kg). To verify or adjust the load indication system place one foot on the RHGSE and retract
the load at a moderate speed and increase the load with the load adjuster until the GSE just starts to
lift off the ground. Adjust the display by turning the screw to adjust the span of the display to display
580 lbs or 264 kg as the cable is being retracted.
Normally the RHGSE will only be extended and retracted once during the course of a preflight,
post flight or a daily hoist inspection. However in the case where a new wire rope has been installed it
might be cycled repeatedly to condition the wire rope. In this situation the load should be set at
approximately 100 lbs (46 kg) and then increased to the maximum load in order to condition the wire
rope properly. The brake disc should be allowed to cool after 2 or 3 consecutive cycles. When
conditioning a new cable go slow to allow the cable to acclimate itself to the rescue hoist drum.
Zephyr International llc
Load adjuster
Load cell
Page 15 of 40
ZOM-11000-2 v2 rev E
Load indicator display
United States Patent # 7,429,031 B1