Echo 74824 Owners Manual v.3 - Manual (Page 23)

Page 21 6" & 8" Bear Cat Chipper Operator’s Manual
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.
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
5.10 OTHER SERVICE AND MAINTE-
NANCE TIPS
1. Service engine according to the engine owner's manual.
Change engine oil and filter as recommended in manual.
2. Check all bolts and other fasteners for correct torque
after every 8 hours of operation (see section 7.2 for ap-
propriate torque values).
5.11 TRAILER SERVICE TIPS
1. Check wheel bolt torque every 8 hours of towing.
2. Check air pressure in tires every 8 hours of towing. In-
flate to pressure marked on sidewall of tire.
3. Check and repack wheel bearings with grease every 12
months.
4. When towing, use a 2" (inch) trailer ball, and always
connect the safety chains. Make sure trailer hitch bolts
are tight and secure.
Figure 5.10 - Hydraulic Pump Components
5.12 HYDRAULIC FLUID (MODELS
72620 & 74824)
5.13 HYDRAULIC PUMP START UP
PROCEDURE (72620 & 74824)
SERVICE & MAINTENANCE
4. Start the engine and run at the lowest possible RPM.
5. As air is purged from the unit, the oil level in the reser-
voir will drop and bubbles may appear in the fluid. Refill
the reservoir as necessary.
6. Run the unit and move the control arm in both direc-
tions for several minutes until any remaining air is purged
from the unit. Refill the reservoir as necessary.
7. 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.
8. Shut down the engine, check for and correct any fluid
leaks, and check the reservoir level. Add fluid if neces-
sary. The hydrostatic pump is now ready for operation.
WARNING
Do not start engine unless pump is in neutral position
on the cable.
1. Before starting the hydraulic pump, make sure all sys-
tem components (reservoir, fittings, etc.) are clean (see
Figure 5.10).
2. Add recommended hydraulic fluid to the reservoir. The
hydraulic fluid should be filtered before it enters the res-
ervoir.
3. 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.
NOTE
Hydrualic pressure controlled by the crossover relief valve
is factory set at 1750 PSI.