Discharging The Capacitors; Special Tools - Yale ERP15-20VT Service Manual

General

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 dan-
gerous operating conditions. DO NOT operate a lift
truck that needs repairs. Report the need for repairs
to your supervisor immediately. If repair is neces-
sary, 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 cov-
ers 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 electri-
cal 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 con-
troller and prevent the capacitors from discharging
properly. The proper way to disconnect the battery
is by separating the battery connectors.
1. Ensure capacitors are discharged by performing
Step 2 through Step 6 below.
2. Turn key or keyless switch to OFF position.
3. Disconnect battery by separating connectors.
2
4. Block drive wheels to prevent lift truck from moving.
5. Make sure Emergency Disconnect Switch HAS
NOT been activated.
Switch is activated, rotate switch to the right until it
pops up.
6. Press horn button. Wait 30 seconds to be sure
capacitors are fully discharged.

SPECIAL TOOLS

Special tools are necessary to properly perform some
repairs. These tools are available from your Yale
dealer. Warranty will not cover damage resulting from
work done using improper tools. Refer to Table 1.
Table 1. Yale Special Tools
1300 YRM 1330
If Emergency Disconnect
Input Seal Driver
Yale Part No.
582000161
Breather Set Tool
Yale Part No.
582000187
Wheel Stud Tool
Yale Part No.
582000162