11
3.
VENT PLUG
The vent plug is located in the drum support as shown. It is
important to keep this vent clean and unobstructed. When-
ever gear oil is changed, remove vent plug, clean in solvent
and reinstall.
Do not paint over the vent or replace with a solid plug.
4.
HYDRAULIC SYSTEM
The original filter element should be replaced after the first 50
hours of operation, then every 500 operating hours or three
months, or in accordance with the equipment manufacturer’s
recommendations.
5.
WIRE ROPE
Inspect entire length of wire rope according to wire rope
manufacturers recommendations.
6.
MOUNTING BOLTS
Tighten all hoist base mounting bolts to recommended
torque after the first 100 hours of operation, then every 1,000
operating hours or six months, whichever occurs first.
7.
WARM-UP PROCEDURES
A warm-up procedure is recommended at each start-up and
is essential at ambient temperatures below +40°F (4°C).
The prime mover should be run at its lowest recommended
RPM with the hydraulic hoist control valve in neutral allow-
ing sufficient time to warm up the system. The hoist should
then be operated at low speeds, raised and lowered, several
times to prime all lines with warm hydraulic oil, and to circu-
late gear lubricant through the planetary gear sets.
8.
INSPECTION
A.
Bearings and Gears
– Refer to sections
HOIST DISASSEMBLY, page 16, and
PLANET CARRIER SERVICE, page 20 of this
service manual.
B.
Brake Cylinder
– Refer to MOTOR
SUPPORT – BRAKE CYLINDER SERVICE,
pages 22 and 23.
C.
Brake Clutch
– Refer to BRAKE CLUTCH
SERVICE, page 26.
9. RECOMMENDED PLANETARY GEAR OIL
Use of the proper planetary gear oil is essential to reliable
and safe operation of the brake clutch and obtaining long
gear train life.
For simplicity, BRADEN has listed one readily available
product in each temperature range which has been tested
and found to meet our specifications.
Failure to properly warm up the hoist, particularly under
low ambient temperature conditions, may result in tem-
porary brake slippage. This is a result of high back pres-
sures attempting to release the brake, which could result in
property damage, severe personal injury, or death.
Failure to use the proper type and viscosity of planetary
gear oil may contribute to intermittent brake clutch slip-
page which could result in property damage, severe per-
sonal injury, or death. Some gear lubricants contain large
amounts of extreme-pressure (EP) and antifriction addi-
tives which may contribute to brake clutch slippage and
damage to brake friction discs or seals. Oil viscosity with
regard to ambient temperature is also critical to reliable
brake clutch operation. Our tests indicate that excessive-
ly heavy or thick gear oil may contribute to intermittent
brake clutch slippage. Make certain that the gear oil viscos-
ity used in your hoist is correct for your prevailing ambient
temperature.
