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12 John Deere Operator's Manual
INSTALLATION & PREPARATION
END OF PREPARATION INSTRUCTIONS
UNLOADER:
The unloader on these models is not equipped with an adjustment knob. DO
NOT adjust pressure on your own. The pressure has been preset at the factory
and should only be adjusted by a trained Service Representative.
CAUTION
RISK OF UNIT DAMAGE!
DO NOT OVERTIGHTEN THE
UNLOADER. BREAKAGE COULD
RESULT IN IMMEDIATE LOSS OF
WATER PRESSURE AND COSTLY
REPAIRS.
THERMAL RELIEVE VALVE:
To ensure the water temperature does not exceed acceptable levels, never allow
the pressure washer to operate in the bypass mode (with the unit running and
the trigger closed) for more than three minutes.
A thermal relieve valve has been added to this unit to protect the pump. It may
begin to open and release water if the water temperature in the pump has exceeded
140° F. This will allow fresh, cool water to enter the system, therefore preventing
premature failure of pump packings.
PRE-START INSPECTION PROCEDURES:
Before starting the unit, perform the following procedures:
1. Check the oil level in the pump and engine.
2. Inspect the water inlet strainer. Clean or replace if necessary. See "Water
Supply", #2, pg 13.
3. Check all hose connections to ensure they are securely tightened. See
"Water Supply", #3, pg. 13.
4. Inspect for system water leaks, oil leaks and fuel leaks. If a fuel leak is
found, DO NOT START UNIT! See "Risk of Explosion or Fire", pg. 4. Be
sure that all damaged parts are replaced and that the mechanical problems
are corrected prior to operation of the unit. If you require service, contact
Customer Service.
5. Inspect high pressure hoses for kinking, cuts and leaks. If a cut or leak is
found, DO NOT USE HOSE! Replace hose before starting unit. See "Risk
of Injection" pg. 5. Be sure that all damaged parts are replaced and that
the mechanical problems are corrected prior to operation of the unit. If you
require service, contact Customer Service.