Rev. 4/18/2018
CART-DC, MANUAL
Copyright 2018 Vestil Manufacturing Co.
Page
13
of
15
Check the hydraulic hoses for wear, kinks, cuts, etc. Replace damaged hoses.
Check hardware: roller bushings, axle pins and retaining rings, clevises, pivot points, fasteners, and casters
for severe wear and damage. Replace all components that are severely worn or damaged.
Inspect each leg roller for looseness and/or severe wear. Replace rollers as necessary.
Cycle the tabletop. Listen for unusual noises; watch for abnormal movement. See "Troubleshooting", p. 13-
14.
Make sure all labels are in place & in readable condition. See “Labeling diagram” on p. 13.
Clean debris from all surfaces.
(C) Yearly: Change the oil at least once a year. The oil should be changed as soon as it darkens, becomes gritty,
or appears milky. Milky appearance indicates the presence of water. Replace the oil with AW-32 hydraulic fluid or
its equivalent.
The cart should always be labeled as shown. Replace any label that is missing, damaged, or not easily readable
(e.g. faded). Contact Vestil to order replacement labels.
Troubleshooting:
NOTE:
Use this guide in conjunction with the Troubleshooting section of your MPU-DC manual. Solutions in
italics
are found in the MPU-DC manual.
Contact Vestil for assistance with issues not listed below.
Issue Explanation
Solution
1. Tabletop does not rise when
UP button pressed, but pump
is running.
a. Voltage at motor terminals too low to run
pump.
b. Hydraulic hose leaking.
c. Fluid level in hydraulic reservoir too low.
d. Load exceeds capacity/max. rated load
limit (relief valve opening).
e. Clogged suction filter.
f. Suction line leaking or loose fittings.
g. Clogged filler/breather cap on tank.
h. Lowering valve energized by faulty
wiring or stuck open.
i. Hydraulic
pump
malfunctioning.
a.
Measure voltage at motor terminals (or
as close to terminals as possible) while
pump runs under load. If voltage is
adequate, check wiring
.
b. Correct as appropriate.
c.
Add fluid.
The system uses HO150
hydraulic fluid. Replace the hydraulic
fluid with an anti-wear hydraulic fluid of
viscosity grade of 150 SUS at 100°F
(ISO 32 @ 40°C) such as AW-32 or
Dexron transmission fluid
.
d.
Reduce weight applied to tabletop. DO
NOT change relief valve setting!!
e.
Remove filter and clean it
.
f.
Inspect all fittings for proper fit
.
g.
Remove and clean
.
h.
Remove lowering valve and clean
.
i.
Disconnect hydraulic line from cylinder.
Put free end of hose in large container
Labeling diagram:
Label 208: Keep clear of pinch point
Label 269: Use maintenance prop
Label 206 (inside power unit housing):
Hydraulic oil specifications
Label 658:
Label 295 (on outside of
power unit housing):
Battery handling hazards
Label 287: Model & capacity
Label 212: Lock casters
Label 824: Stand clear