154
appendix 2 - General troubleshooting
PROBLEM
CAUSE AND SOLUTION
Low vacuum pressure.
•
Truck engine speed is too low and PTO is not
turning the vacuum blower at proper RPM. Raise
engine speed to operating RPM.
•
Vacuum filter canister or cyclonic door seal
leaking. Clean or replace lid seal.
•
Vacuum debris tank relief valve leaking or stuck
open. Clean or replace leaking valve.
•
Vacuum filter is clogged. Clean or replace
vacuum filter.
•
Vacuum service port plug is not installed. Insert
service plug.
Vacuum loss or failure.
•
A vacuum hose is worn through or damaged.
Replace worn or damaged vacuum hose.
•
Vacuum hose plugged with debris. Hit hose with
dead blow hammer to breakup debris. Replace
hose if necessary.
Vacuum system relief valve sticks open.
•
Debris in relief valve is causing it to stick.
Clean and lubricate relief valve. Replace valve
if necessary.
•
Vacuum hose is clogged. Clear clogged hose.
Replace hose if necessary.
•
Vacuum hose kinked. Replace kinked hose.
Содержание RH7500
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