Wood’s Powr-Grip MRTA611LDC - Manual (Page 24)

Rev 14.0/5-13 22 MRTA6-DC: #35072
M
AINTENANCE
S
CHEDULE
Unless specified elsewhere in this INSTRUCTIONS manual, the lifter does not require
maintenance on a routine basis. Instead, maintenance must be performed whenever a
deficiency is indicated by routine inspections or tests. Any maintenance warranted must be
performed before resuming normal operation of the lifter.
B
ATTERY
T
EST
The lifter is equipped with a battery gauge to help the operator evaluate
whether the battery has adequate energy for lifting. Factors such as the
condition of the battery, the time required to execute a lift, and the
porosity of the load combine to determine how much battery energy is
needed.
It is the operator’s responsibility to evaluate these
conditions and to make sure the battery has sufficient energy to
complete a lift safely. Check the battery energy before every lift and
also at the end of each day's use, to decide whether a charge is needed
(see B
ATTERY
R
ECHARGE
to follow). 14 Never use the lifter when battery
energy registers lower than 50% (that is, when only red lights are illuminated), regardless of the
estimated energy requirement.
WARNING: Never use lifter if battery energy is lower than 50% of capacity.
While the valve handle is in the “APPLY” position (power on), the battery gauge automatically
monitors battery energy. However, the battery gauge shuts off temporarily while the vacuum
pump is running, to prevent an inaccurate reading. When the pumping cycle is completed, the
battery gauge requires a few moments to stabilize before it displays an accurate energy reading
again.
While the valve handle is in the “RELEASE” position (power off), the battery energy can be
checked manually using the battery test button. If the lifter has not been used since the battery
was charged, the battery gauge may falsely indicate an energy level that is higher than actual,
due to a “surface charge” on the battery. After the pump runs for approximately one minute, the
surface charge dissipates, allowing the operator to take an accurate energy reading.
B
ATTERY
R
ECHARGE
Only use a battery charger supplied by or approved by Wood's Powr-Grip; other chargers may
reduce battery life. Charge the battery as soon as possible after any extended use of the lifter,
or whenever the battery gauge indicates diminished energy (see B
ATTERY
T
EST
preceding).
Temperatures above 70° Fahrenheit [21° Celsius] require the battery to be charged more
frequently.
CAUTION: Charge the battery only while the valve handle is in “RELEASE” position
(power OFF). Operating the lifter when the charger is connected to an AC power source could
result in permanent damage to the charger.
14
The battery charger must be disconnected from its AC power source in order to test the battery energy; otherwise, the energy
reading on the battery gauge would not be accurate.