Echo 74520 Owners Manual v.2 - Manual (Page 19)

Page 15 5" Chipper W/Hyd. Feed Owners Manual
The hydraulic pump normally does not require regular fluid
changes. The system filter should be changed at 250 hours
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.
Operation
4.4.3 CONTROL ARM OPERATION
l. Start the chipper engine or engage the PTO. Bring
the chipper up to operating speed. Refer to and follow
the engine starting, chipper operation, and engine
stopping instructions.
2. Engage the hydraulic feed by moving the control arm.
The control arm has four positions: Reverse, Forward,
Stop, and Reverse.
3. Feed the branch (up to five inches in diameter).
4. Reverse the feed by moving the control arm to either
reverse position if the chipper jams. Remove the
branch and rotate it before reinserting it into the
chute.
5. Adjust the speed of the feed roller with the knob on
the hydraulic control valve.
4.4.4 HYDRAULIC FEED MAINTE-
NANCE
FEED ROLLER
DIRECTION DECAL
AUTO FEED
INSTRUCTION DECAL
CONTROL ARM
Fig. #8, Control Arm Operation
NOTE
Check the reservoir daily for proper fluid level, the
presence of water (noted by a cloudy to milky
appearance, or free water in bottom of reservoir), and
rancid fluid odor (excessive heat).
CAUTION
Hydraulic systems contain fluid under high pressure.
Never check for leaks with your hands. Relieve pressure
before disconnecting any hydraulic lines.