9
The gear oil should be changed whenever the ambient
temperature changes signifi cantly and an oil from a dif-
ferent viscosity range would be more appropriate. Our
tests indicate that excessively heavy or thick gear oil may
contribute to intermittent brake slippage. Make certain the
gear oil viscosity used in your hoist is correct for your pre-
vailing ambient temperature.
NOTE: If the oil sampling/analysis has not been performed
as required, tear-down inspections will be required. Refer
to Hoist Disassembly section of this manual.
The GH30B-FF hoist has an oil seal which separates the
primary housing gear oil from the free-fall housing gear oil.
The free-fall end is fi lled to the center of the sight gauge
shown on the drawing. The motor end is fi lled until oil
drains out of the level plug shown on the drawing. Wire
rope must be spooled off the drum to allow access to the
drum drain plug. Rotate the drum until the drain plug is at
the lowest point.
To change the gear oil, remove the drain plugs shown on
the drawings below from each end of the hoist and the
drum and collect a sample from each housing for oil analy-
sis. Removing the vent plugs will speed the oil drain. When
the oil has drained, install the drain plugs.
Refi ll the hoist with the recommended gear oil and install
the fi ll plug.
3. The vent plugs are located in the free fall housing cov-
er and motor adapter. It is important to keep the vent
plugs clean and unobstructed. Whenever the gear oil is
changed, the vent plugs should be removed, cleaned
in solvent and reinstalled. Do not paint over the vent
plugs or replace with a solid plug or grease fi tting.
Failure to use the proper type and viscosity gear oil may
result in loss of load control, property damage, injury or
death.
OIL FILL
VENT
FREE FALL
OIL LEVEL
SIGHT GAUGE
OIL DRAIN
FREE FALL END
E PORT
OIL DRAIN
PRIMARY HOUSING
OIL LEVEL
VENT
OIL FILL
BRAKE RELEASE
PORT
MOTOR END
FREE FALL
BRAKE RELEASE PORT
DRUM OIL
DRAIN PLUG
OIL DRAIN
PRIMARY HOUSING
OIL LEVEL
VENT
OIL FILL
BRAKE RELEASE
PORT
MOTOR END
February 2012
Serial Number 1200211 and Up
2008 till February 2012
