Preventative Maintenance - BRADEN BG4A Installation Maintenance And Service Manual

REVERSING DIRECTION OF DRUM
ROTATION
For standard rotation when hoisting, the cable drum rotates
counter clock-wise (CCW) when viewed from the motor
end.
In order to reverse the direction of rotation of the cable drum,
two changes must be made on the motor end of the hoist.
standard rotation
Counterbalance Cartridge
Hoisting Port
PREVENTIVE MAINTENANCE
A regular program of preventive maintenance for your plan-
etary hoist is strongly recommended to minimize the need
for emergency servicing and to promote safe and reliable
hoist operation.
The user of BRADEN hoist products is responsible for hoist
inspection, testing, operator training and maintenance noted
below with the frequency dependent on the hoist duty cycle
and the thoroughness of the preventive maintenance pro-
gram. Field experience, supported by engineering testing,
indicates the three (3) service procedures listed below are
the MOST critical to safe, reliable hoist operation and MUST
be observed.
• Regular Gear Oil Changes – every 1000 hours, or six (6)
months.
• Use of Proper Gear Oil – recommended type and viscos-
ity for prevailing ambient temperatures.
• Periodic Disassembly and Inspection of All Wear Com-
ponents – for recommendations, refer to Bulletin PB-308.
Crane inspection records, as well as records of hoist preven-
tive maintenance, repairs and modifications, must be avail-
able for a minimum of five (5) years. These records should
include, but not be limited to, hoist model and serial number,
name and employer of repair technician, date of work and
description of work performed.
Check Valve
Lowering Port
1. Remove and reverse the positions of the counterbalance
and check valve cartridges in the brake valve block. For
standard rotation, the counterbalance cartridge is installed
in the left hand (LH) port when looking at the motor end of
the hoist. For opposite, or reversed, rotation, the counterbal-
ance cartridge must be installed in the right hand (RH) port.
NOTE: On early units with dual counterbalance cartridges,
skip this step.
2. Remove and reverse the positions of the hydraulic motor
lines connected to the brake valve. The line for powering the
motor in the hoisting direction must be installed in the port
that is in-line with the counterbalance cartridge.
reverse rotation
Check Valve
Lowering Port
1. Oil Level
The gear oil level should be checked every 500 operating
hours, three (3) months, or whenever an oil leak is detect-
ed; whichever occurs first. To check the oil level, remove
the large plug located in the center of the bearing support
endplate. The oil should be level with the bottom of this
opening. If additional oil is needed, refer to "Recommended
Planetary Gear Oil" for correct oil type.
Hoist gear oil capacity is approx. 2 pints (1 liter.)
2. Oil Change
The gear oil should be changed after the first 100 operat-
ing hours or three (3) months, whichever occurs first. The
gear oil should then be changed once every 1,000 operating
hours or every six (6) months, whichever occurs first. The
gear oil must be changed to remove wear particles that im-
pede the reliable and safe operation of the brake clutch and
erode bearings, gears and seals.
WARNING
CAUTION
!
Failure to change gear oil at these suggested minimum in-
tervals may contribute to intermittent brake slippage which
could result in property damage, severe personal injury or
death.
8
Counterbalance Cartridge
Hoisting Port
!