Maintenance Safety - Demco 9CCRTB14 Operator's Manual

Working on hydraulic
systems
DANGER:
Clear area around tractor
of bystanders before
raising tub.
DANGER:
Do not preform
maintenance on tub body
without physically blocking
body and cylinders to
prevent lowering.
WARNING:
can have enough force to penetrate the skin. Hydraulic
fluid may also infect a minor cut or opening in the skin.
If injured by escaping fluid, see doctor at once. Serious
infection or reaction can result if medical treatment is
not given immediately. Make sure all connections are
tight and that hoses and lines are in good condition
before applying pressure to the system. Relieve all
pressure before disconnecting the lines or performing
other work on the hydraulic systems.
Tub and frame
inspections

Maintenance Safety

Before performing maintenance
between the frame rails, park
tractor on a level surface, tub
fully dumped, then hydraulic hoses
uncoupled.
If service requires the tub to be
partially dumped follow the proper
safety procedures.
1. Make two tub braces using 1/4" x
3" x 3" angle iron.
2. Raise tub and insert angle iron
over cylinder rod on each end.
(See Photo)
3. After tub is secured in raised
position:
a. Disengage the PTO; relieve the
pressure from the hydraulic
system by jogging control valve
both directions to relieve
pressure from the system.
b. When working on hydraulic
systems, EXTREME caution
must be used to avoid injuries
from high pressure or hot oil.
c. Never attempt to work on
loaded trailer.
Hydraulic fluid escaping under pressure
An important phase of truck box upkeep and maintenance is the inspection
and repair, if any, of all structural steel members of the truck box frame
and tub. It is readily apparent that the frame and tub must be one solid unit
to carry the load safely and quickly without danger of accident or further
damage to the trailer. This also prevents subsequent major repair, cost and
trailer down time.
The need for a complete frame and tub inspection stems from various
reasons:
• Truck box loaded to maximum rated capacity, or greater.
• Rough handling may also cause structural failures of varying
degrees. The failures are the results of metal fatigue due to flexing,
twisting, distortion.
Frame and tub failure will show up in the steel frame members as weld
cracks, cracked and loosened steel sections.
To detect any fractures before they become major failures:
• Once a month thoroughly inspect the truck box for any sign of failure
and correct any defects.
• It is desirable to have the truck box completely washed down so all
the joints and welds may be closely viewed.
Angle Iron
1/4" x 3" x 3" Angle Iron
(20" Min. Length)
11