Troubleshooting
The troubleshooting guide will help you identify the
probable cause of a system malfunction and establish
the most effective corrective action.
Troubleshooting tips
The following tips have been helpful in isolating system
malfunctions and in correcting problems quickly.
•
Listen to the machine and watch it operate. Learn to
recognize the normal noises, temperature, and oper
-
ating conditions. This will increase your ability to
notice any unusual machine behavior.
•
Keep a record of all service performed on equipment.
This will provide valuable information to help you
stock spare parts and schedule maintenance.
A maintenance and service log is located at the end of
this chapter.
Weep holes
Weep holes provide an outlet for high-pressure water in
case of seal problems, and thus can help you identify
problems with the pump. Leakage is usually caused by
a failed high-pressure seal, but could also be caused by:
•
Loose or leaking end cap (refer to the intensifier
manual, M-376, 94K Hyperpressure™ Intensifier)
•
Failed check valve body o-rings
•
Cracked or scored high-pressure check valve body
•
Fractured fittings, such as tees, elbows, or couplings
•
Loose high-pressure connections
•
Damaged high-pressuring tubing/fitting conical seal
Troubleshooting the high-pressure
components
If you have questions about anything on the trouble
-
shooting tables, contact FLOW Technical Service.
Using the troubleshooting table
The probable causes of each malfunction are listed in
order, starting with the most likely to occur. Each cor
-
rective action is a condensed, step-by-step summary of
the service required to fix the problem.
When you encounter a system malfunction, refer to the
troubleshooting table and:
1. Define the problem.
2. Locate the symptom that most closely resembles
the problem.
3. Identify the most likely probable cause.
4. Follow the corrective action procedure.
If the symptoms in the guide do not correspond to your
malfunction, or if the problem is not eliminated by the
recommended corrective action, contact Flow Technical
Service.
34 | M-390 © Flow International Corporation
HYPERJET™ 94i-S AND 94i-D PUMPS
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