MSD 7R SHEARS
Page 22
Section 5
Maintenance
HYDRAULIC SYSTEM
MAINTENANCE
Use the following instructions to safely perform hy-
draulic checks and maintenance on the attachment.
1.
ALWAYS
relieve all hydraulic pressure of the ex-
cavator—by working controls in both directions with
the engine off—before attempting to work on any
hydraulic component.
2.
Shut off the base machine and check the hydrau-
lic system pressure. It should be zero (0) PSI. There
is a diagnostic port on the shear manifold to check
the pressure; the 1/4” NPTF (-1/4-18) plug will need
to be replaced with an adapter fi tting for your test
gauge.
3.
Hydraulic oil becomes hot during operation.
DO
NOT
let hot hydraulic oil get in contact with the skin
as it could cause severe burns.
4.
Check all hydraulic components (hoses, fi ttings,
mounting hardware, etc.) every 80 hours.
5.
The hydraulic manifold is equipped with a diag-
nostic nipple to check the pressure coming from the
base machine. Maintaining proper operating pres-
sure will result in optimum cutting performance; also
as a quick check to see if base machine is perform-
ing up to manufacturer’s recommendations.
6.
Whenever hydraulic lines are disconnected, hoses
must be capped and ports must be plugged to pre-
vent contamination of the hydraulic system.
Relieve pressure before disconnecting hydraulic
lines. Tighten all connections before applying
pressure. Keep hands and body away from pin
holes and nozzles, which can eject fl uids under
high pressure. Use a piece of cardboard to search
for leaks. Escaping fl uid under pressure can
penetrate the skin and cause serious injury.
If ANY fl uid is injected into the skin, seek
immediate medical attention.
NEVER adjust pressure relief valves to get
higher operating pressures. The manufacturer’s
recommended pressures give the safest
performance with the longest life.
