Checks With Key Switch Turned On; Operation - Yale 524150797 Maintenance Manual

Maintenance Procedures Every 8 Hours or Daily

CHECKS WITH KEY SWITCH TURNED ON

Operation

WARNING
Make sure the area around the lift truck is clear
before moving the lift truck. Always look in the
direction that you intend to move the lift truck. Be
careful when making checks or servicing the lift
truck.
Make sure a properly charged battery of the correct
voltage is installed and connected. Turn the key switch
to the ON position. Move the directional butterfly
switch on the control handle head to test for proper
forward and reverse travel operation.
WARNING
Use the battery power disconnect to shut down the
truck only in an emergency.
The key switch (or toggle switch) is a two position
switch located on the right side of the dash display.
The first position is OFF (marked "O"). The second
position is ON (marked "I"). The key switch should be
used as the primary means of shutting down the truck.
WARNING
Always wear the proper protective equipment
including eye protection and petroleum-resistant
gloves when handling hydraulic oil. Thoroughly
wash oil from exposed areas of skin as soon as
possible.
Completely lower the forks to relieve hydraulic
pressure before disassembling any part of the lift
pump or disconnecting any hydraulic hoses.
The hydraulic oil is hot at normal operating
temperatures. Be careful when draining the oil.
Never put your hands on pressurized hydraulic
components. Highly pressurized hydraulic oil
escaping through pin-hole leaks can be injected
into the skin. Visually inspect to find hydraulic
leaks.
CAUTION
Protect the hydraulic system from dirt and
contaminants when
system.
12
servicing the hydraulic
Never operate the pump without the proper
amount of oil in the hydraulic system. Operating
the hydraulic pump with low oil levels will damage
the pump.
1. Raise the forks slowly without a load. Check for
smooth operation and mechanical interference.
Mechanical interference is caused by damaged or
worn linkage or shafts or by incorrect adjustment
of the tension rods.
2. Check for damaged or worn linkage bushings or
shafts.
3. Check for missing or loose shaft pins.
4. Check load wheels and support bearings, shafts,
and shaft pins for wear, damage, or missing parts.
WARNING
If any function does not operate or operates
incorrectly, remove the truck from operation and
attach a DO NOT OPERATE tag to the control
handle. Remove the key and disconnect the
battery.
Test the lift truck operation in an area that is clear
of personnel and equipment.
5. Check the operation of the key switch. Functions
should not operate with the key in the OFF
position. Turn the key to the ON position. Lower
the control handle to the operating (BRAKE OFF)
position. The horn, hydraulic functions, traction
functions, and brake should be operational.
6. Check the operation of the brake switch. Release
the control handle to allow it to return to the
vertical position. Rotate the directional control
(butterfly) switch without lowering the control
handle. The traction system must not operate
under these conditions.
7. Check the operation of the directional control
(butterfly) switch. Lower the control handle to
release the brake. Slowly rotate the directional
control (butterfly) switch in either direction. The lift
truck must accelerate smoothly. Rotate the switch
in the opposite direction. The lift truck must stop
smoothly and then change direction. Check the
control handle return spring. The control arm
should return to the full vertical position when the
control handle is released.
8000 YRM 1666