Echo 76824 Owners Manual v.1 - Manual (Page 25)

PN 18280-00 R121505 23
SERVICE & MAINTENANCE
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE,
DISENGAGE THE HYDRAULICS AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
WARNING
5.7.3 HYDRAULIC PUMP START UP
Follow this start-up procedure when starting a new installation or
when restarting an installation in which the hydraulic pump has
been removed from the system.
Before starting the hydraulic pump, make sure all system
components (reservoir, fittings, etc.) are clean (Figure 5.9).
Add recommended hydraulic fluid to the reservoir. The hy-
draulic fluid should be filtered before it enters the reservoir.
The inlet line leading from the reservoir to the charge pump
must be filled before start-up. Loosen the fitting on this inlet
line until oil bleeds out.
Start the engine and run at the lowest possible RPM.
As air is purged from the unit, the oil level in the reservoir will
drop and bubbles may appear in the fluid. Refill the reservoir
as necessary.
Run the unit and move the control arm in both directions for
several minutes until any remaining air is purged from the
unit. Refill the reservoir as necessary.
Check to ensure that the feed roller stops when the control
arm is in the neutral position. Adjust the cable clevis or
anchor if the feed roller doesn't stop.
Shut down the engine, check for and correct any fluid leaks,
and check the reservoir level. Add fluid if necessary. The
hydrostatic pump is now ready for operation.
1.
2.
3.
4.
5.
6.
7.
8.
Figure 5.9 - Hydraulic Pump Components
5.7.1 HYDRAULIC FLUID
Handle pressurized hydraulic fluid carefully. Escaping pressurized
hydraulic fluid may penetrate your skin causing serious injury.
This fluid may also be hot enough to burn. Serious infection or
reactions can develop if immediate proper medical treatment is
not administered.
Premium hydraulic fluids containing high quality rust, oxidation,
and foam inhibitors are required. These include premium turbine
oils, API CD engine oils per SAE J183, M2C33F or G automatic
transmission fluids meeting Allison C-3 or Caterpillar TO-2, and
certain specialty agricultural tractor fluids.
5.7 HYDRAULICS
Hydraulic pressure controlled by the crossover relief valve is
factory set at 1750 PSI.
NOTE
Do not start engine unless pump is in neutral position
on the cable.
WARNING
5.7.2 HYDRAULIC FEED MAINTENANCE
The hydraulic pump normally does not require regular fluid
changes. The system filter should be changed after 250 hours
of operation or annual intervals. The fluid and filter should be
changed and system cleaned if the fluid becomes contaminated
with foreign matter (water, dirt, grease, etc.) or if the fluid has
been subjected to temperature levels greater than the maximum
recommended.
There is a greaseable bearing on each side of the main jack
shaft on the main hydraulic feed housing. Grease periodically
(Section 5.6).
Before servicing or repairing any of the hydraulic feed
components (pump, motor, and/or relief valve), contact your
dealer or factory service department. Warranty on these items
may be void without prior authorization.
WARNING
Hydraulic systems contain fluid under high pressure.
Never check for leaks with hands. Relieve pressure before
disconnecting any hydraulic lines.
WARNING