Hyster A970 - Serial Number Data; Discharging the Capacitors

SERIAL NUMBER DATA
The serial number code for the lift truck is on the
Nameplate and stamped into the front face of rear
bulkhead. See Figure 1.
1. SERIAL NUMBER
Figure 1. Stamped Serial Number
DISCHARGING THE CAPACITORS
WARNING
DO NOT make repairs or adjustments unless you
have been properly trained and authorized to do
so. Improper repairs and adjustments can create
dangerous operating conditions. DO NOT operate
a lift truck that needs repairs. Report the need for
repairs to your supervisor immediately. If repair is
necessary, attach a DO NOT OPERATE tag on the
steering wheel and disconnect the battery.
Disconnect the battery and allow the capacitors to
discharge before opening any compartment
covers or inspecting or repairing the electrical
system. DO NOT place tools on top of the battery.
If a tool causes a short circuit, the high current
flow from the battery can cause personal injury or
property damage.
Some checks and adjustments are performed with
the battery connected. DO NOT connect the
battery until the procedure instructs you to do so.
Never wear any metallic items on your fingers,
arms, or neck. Metal items can accidentally make
an electrical connection and cause injury.
Before performing any tests or adjustments, block
the lift truck to prevent unexpected movement.
The capacitor in the transistor controller(s) can
hold an electrical charge for about 10 seconds
after the battery is disconnected. To prevent an
electrical shock and personal injury, discharge
the capacitor(s) before inspecting or repairing any
component in the drive unit compartment. Make
certain that the battery has been disconnected.
DO NOT short across the motor controller
terminals with a screwdriver or jumper wire.
Make certain the Emergency Disconnect Switch
has not been activated. This will isolate the
controller and prevent the capacitors from
discharging properly. The proper way to
disconnect the battery is by separating the battery
connectors.
1.
Ensure the capacitors are discharged by
performing Step 2 through Step 6 below.
2.
Turn the key or keyless switch to the OFF
position.
3.
Disconnect the battery by separating the
connectors.
4.
Block drive wheels to prevent lift truck from
moving.
5.
Make sure the Emergency Disconnect Switch
HAS NOT been activated. If the Emergency
Disconnect Switch is activated, rotate the
switch to the right until it pops up.
6.
Press horn button. Wait 30 seconds to be sure
capacitors are fully discharged.
General 8000 SRM 1541
2