Echo 72928 Owners Manual v.4 - Manual (Page 11)

8
S E C T I O N 2
Hydrostatic pressure controlled by the crossover relief
valve is factory set at 1750 PSI. A 2000 PSI shim kit is
available for extreme conditions.
Figure 2.6 Pump-Component Locations
Torque Chart
Standard minimum
tightening torque for normal
assembly applications.
Bolts (SAE GR5)
Size Ft. Lbs.
5/16" 20
3/8" 35
1/2" 75
5/8" 90
Screws
Size Ft. Lbs.
5/16" Set 15
Warning! Do not start engine unless pump is in neu-
tral or detent position on the cable.
4. Start the engine and run at the lowest possible RPM.
5. Loosen the motor fittings until oil bleeds out to
remove air from the system. Retighten fittings.
6. 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.
7. Run the feed roller in both directions for several
minutes until any remaining air is purged from the
unit. Refill the reservoir as necessary.
8. 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. Install battery (not included: use group 22F 300 CCA
min), connect positive and ground battery cables, and
check battery condition. Charge if needed. Note: If
needed, a larger group UB72 battery may be used.
Use caution when connecting battery cables near
fuel. A spark could ignite the fuel and cause a fire.
2. Fill the engine with oil (per instructions in supplied en-
gine manual) and fill the fuel tank with fuel.
Important! See instructions below, for hydrostatic
pump start-up procedure.
2.1.10 Hydraulic Fluids
Handle pressurized hydraulic fluid carefully. Escap-
ing pressurized hydraulic fluid can have sufficient
force to penetrate your skin causing serious injury.
This fluid may also be hot enough to burn. Serious infec-
tion or reactions can develop if proper medical treatment
is not administered immediately.
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.
2.1.11 Prepare Hydraulic System
Follow this start-up procedure when starting a new
installation or when restarting an installation in which the
hydrostatic pump has been removed from the system.
The flow from the reservoir to the hydrostatic pump and
the flow returning from the hydrostatic pump are always
the same. Hydraulic fluid can flow either direction between
the hydrostatic pump, crossover relief valve, and motor.
1. Before starting the hydrostatic pump, make sure all
system components (reservoir, fittings, etc.) are clean.
2. Fill the reservoir with recommended hydraulic fluid,
which should be filtered before entering the reservoir.
3. The inlet line leading from the reservoir to the charge
pump must be filled before start-up. Loosen the fitting
at the pump on this inlet line until oil bleeds out.