SAFETY
Control of Hazardous Energy
8
MA-1055-103
03 Rev. 9/07
Capacitance
Due to capacitance voltage present in the traction mo-
tor controller and lift motor controller, whenever per-
forming maintenance which may permit contact with
the bus bars and associated power cables, discharge
the capacitors.
• Move truck to a secure non-traffic maintenance
area with a level floor.
• Lockout or tagout truck as described in Lockout -
Tagout in this section.
• Disconnecting the battery will discharge the capac-
itors. Once the dash display flashes, the capacitors
are discharged. Two alternative methods of dis-
charging these capacitors are to disconnect the
battery and hold the key switch in the "start" posi-
tion for 10 seconds or disconnect the battery and
connect a 200 ohm, 2 watt resistor between the
positive and negative terminals on the controller.
• Turn key switch to "OFF", remove key.
Hydraulic
AVOID HIGH PRESSURE FLUIDS – Escaping fluid
under pressure can penetrate the skin causing serious
injury. Relieve pressure before disconnecting hydraulic
lines. Tighten all connections before applying pres-
sure. Keep hands and body away from pin holes which
eject fluids under high pressure. Use a piece of card-
board or paper to search for leaks. Do not use your
hand.
Any fluid injected into the skin under high pressure
should be considered as a serious medical emergency
despite an initial normal appearance of the skin. There
is a delayed onset of pain, and serious tissue damage
may occur. Medical attention should be sought imme-
diately by a specialist who has had experience with this
type of injury.
When maintenance is to be performed on the hydraulic
system, make certain the hydraulic system is not under
pressure by:
• Move truck to a secure non-traffic maintenance
area with a level floor.
• No load on forks.
• Completely lower load engaging means (mast) or,
if required for maintenance, block mast sections at
the appropriate height as described in Mast of this
section.
• Lockout or tagout truck as described in Lockout -
Tagout in this section.
• Depressurize hydraulic reservoir by momentarily
opening cap on reservoir before disconnecting any
hydraulic lines or components.
• Operate hydraulic levers to remove any hydraulic
pressure that may be present.
Figure 16927
Crown 2006 PF15396-4 Rev. 9/07
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