Section 7 — Maintenance • 39
• Make sure the exhaust system is protected from
water intake.
• Make sure the air intake system is protected from
water intake.
• Disconnect or remove the battery.
• Make sure the chipper has a secure “footing” and that
the supporting jack stand is properly positioned.
• Make sure the tires are properly inated.
• Secure all padlocks and remove the ignition keys.
Hydraulic System
Maintaining the hydraulic system is critical to the proper
operation of the unit. Using the proper type of oil helps
to prevent many hydraulic system problems. Maintaining
the oil is also important. If the oil is dirty or contaminated,
components may be damaged.
Notice
Only use hydraulic oil as recommended. Other uids
added to the hydraulic system can increase compo-
nent wear and affect the lubricating characteristics
of the oil.
Check the oil level in the reservoir with the vehicle level.
The proper oil level is between 2” and 3” (5.08 to 7.62
cm) from the top of the tank.
Cleanliness Precautions
Contamination will ruin any hydraulic system. It is very
important that no contamination enter the system. Dirt,
water and air are types of contaminants. They can enter
the hydraulic system in many ways. Contaminants can
enter the system when lling the reservoir or changing
lters. They can also enter when changing components
or performing other service procedures.
The following precautions will help protect the cleanliness
of the hydraulic system.
• Filter new oil with a 10 micron lter as it is added to
the reservoir.
• Clean hydraulic connections before opening them.
• Cap or plug ports and lines opened for service.
• Keep replacement hoses and other components
plugged while stored.
• Clean the reservoir and return line lter covers before
opening them.
• Make sure components are clean before installation.
• Clean the ller breather cap before opening it.
• After servicing the reservoir, immediately replace
the cover.
• Make sure quick disconnect couplers are clean
before connecting them.
• Do not spray water on the reservoir ller breather cap.
This could force contaminants into the reservoir.
Filtration
The unit is equipped with a complete ltration system.
When properly maintained, this system will reduce con-
tamination of the hydraulic system. The ltration system
must be serviced regularly to be effective.
Breather
The breather is located on the side of the ll hole on the
reservoir. The breather allows air to ow in and out of the
reservoir as the oil level changes. It contains a lter that
cleans the air as it enters the hydraulic system.
Notice
When adding oil, always pump oil through a 10 micron
lter prior to adding.
Replace the ller breather as needed. If the unit is operated
in an extremely dusty environment, it may be necessary
to replace the breather more often.
Suction Filter
Hydraulic oil leaving the reservoir through the suction
line, on its way to the pump, passes through a suction
lter which is accessible from inside the hydraulic tank.
The suction lter contains a 100 micron wire mesh ele-
ment. Although the element may be cleaned, it is also
available as a service part.
Clean the lter whenever the hydraulic oil is changed. Oil
will not ow into the pump fast enough if the lter becomes
clogged. If the pump does not receive sufcient oil ow,
pump damage will result.
Warning
Death or serious injury can result from improper
use of solvents. Follow the manufacturer’s label for
proper use and disposal.
Caution
Injury can result from airborne particles entering the
eyes. Wear appropriate safety equipment.
Clean the lter element by ushing it with solvent. Blow it
dry with an air hose from the inside of the screen to the
outside. Check for holes or other damage.
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