Rev. 4/18/2018
CART-DC, MANUAL
Copyright 2018 Vestil Manufacturing Co.
Page
12
of
15
Using the cart:
All loads applied to the tabletop must be centered and evenly distributed. Loads
should not overhang the deck, i.e. should be entirely contained within the deck area.
The capacity of the cart appears on the data label of your unit (see label 287 on p. 13).
Capacity is the maximum
net
weight the cart can support. Exceeding the capacity
could result in personal injury and/or the cart might be permanently damaged.
Elevate the tabletop by pressing the UP button on the hand control. Lower it by
pressing the DOWN button. (See MPU-DC instruction manual for detailed instructions
about the operation of the hand control and modular power unit).Transport loads with
the tabletop lowered. Elevate the tabletop to an ergonomic height when removing
loads or working on an item.
Apply the caster brakes whenever the cart is stopped (see diagram in “Inspections and Maintenance” section).
Push down on the brake lever to apply the brake. Lift the lever to release the brake.
Bleeding Air from Hydraulic System:
If the tabletop lowers extremely slowly or not at all when the DOWN button is pressed, air might be caught in
the cylinder. Air causes a safety feature called a velocity fuse to close. When the velocity fuse is closed, the
tabletop will not lower. To correct this issue, bleed air from the system. A bleeder screw is located at the top of the
cylinder (see appropriate “Exploded view” on pages 4-11). The bleeder screw includes a hose fitting for a small
diameter hose. By attaching a hose to the screw, any oil that escapes during the bleeding process can be
directed into a container for proper disposal.
Unload the tabletop.
Rotate the maintenance prop into position (see diagram in “Inspections and Maintenance” section).
Press the DOWN button until the tabletop is entirely supported by the maintenance prop.
Locate the bleeder valve located at the top of the cylinder (it looks like a grease zerk; see the appropriate
“Exploded View” on pages 4-11). Hold a rag over the valve. Open it about a half turn with a wrench (turn the
hex until air begins to escape). Oil and air will sputter from the valve.
Jog the motor a few times by briefly pressing and then releasing the UP button. If air continues to escape from
the bleeder valve, jog the motor several more times. Wait at least a few seconds (5-10) between jogs.
Close the valve once air no longer is heard or seen bubbling out of it. Just a clear stream of oil should be seen
flowing from the valve.
Remove the cover from the modular power unit. Check the oil level in the reservoir. If the surface of the oil is
lower than 1 to 1½ in. below the fill port, then add oil. Use anti-wear hydraulic fluid with a viscosity grade of 150
SUS at 100°F (ISO 32 @ 40°C) like AW-32 or Dexron transmission fluid.
Inspections and Maintenance:
Before putting the cart into regular service, make a written record of its appearance and operation. Pay
particular attention to pivot points and pivot point hardware. Cycle the tabletop up and down. Describe the motion
of the legs and roller. Describe the sound of the power unit as it operates. Also include a description of the
cylinders and pistons as they extend and retract. Each piston should extend and retract smoothly and at the same
rate as the other. This record establishes normal condition. During future inspections, compare observations to
the record to determine if a component is in normal condition. DO NOT use the cart unless it is in normal
condition.
Immobilize the tabletop with the maintenance prop
before inspecting or performing maintenance on the cart.
1. Unload the cart.
2. Raise the tabletop to its maximum height.
3. Rotate the maintenance prop into contact with the
frame (see dotted arrow).
4. Lower the tabletop until the maintenance prop
presses against the end of the frame.
(A) Before each use, check the cart for any of the following
conditions. Correct all problems before using the cart
Oil leaks;
Pinched or chafed hoses;
Deformation of legs, frame, or tabletop;
Unusual noise or binding.
(B) Monthly inspections:
Check the oil level. Oil should be 1in. to 1
1
/
2
in. below the top of the reservoir/tank (see MPU-DC instruction
manual) with the tabletop fully lowered. Check for oil leaks. Resolve the issue as described in
“Troubleshooting” on p. 13-14. Add oil, if necessary.
Maintenance
prop
End of frame
Frame
HAND CONTROL
UP
DOWN
Caster brake lever
Press lever down to
apply brake. Lift lever
to release brake.
Coil
Cord