| Problem |
|
Possible
Causes |
| Dirty
fluid |
1) |
Components not properly
cleaned after servicing. |
| |
2) |
Improper filtering of fluid
that is added to the system. |
| |
3) |
Reservoir does not have
a breather installed or
the breather was removed. |
| |
4) |
Pipe ends and/or hoses not
properly covered while servicing
machine. |
| |
5) |
Tank baffles improper. They
do not provide a settling
basin for heavy materials. |
| |
6) |
Inadequate filtration or
filters are bypassing. |
| |
7) |
Excessive component wear. |
| Foaming
fluid |
1) |
Fluid return line not below
fluid level. |
| |
2) |
Inadequate or broken baffles
in reservoir. |
| |
3) |
Suction side of pipe leaks. |
| |
4) |
Fluid does not contain an
anti foaming additive. |
| |
5) |
Excessive return flow to
reservoir |
| |
6) |
Excessive return velocity
to reservoir |
| |
7) |
Pump shaft seal failed. |
| Excessive
water in petroleum base
fluid |
1) |
Fluid level below the reservoir
cooling coils. |
| |
2) |
Cold water lines attached
to a hot reservoir will
cause condensation within
the reservoir. |
| |
3) |
Filler left open. Atmospheric
moisture absorbed. |
| |
4) |
Fluid that was added was
contaminated with water. |
| |
5) |
Certain geographical locations
with extreme temperature
differentials will have
excessive condensation. |
| |
6) |
Low point drains not installed
or not used to remove water
collected over long operating
periods. |
| Overheating
of system fluid |
1) |
Insufficient cooling flow
to heat exchanger or heat
exchanger clogged. |
| |
2) |
Relief valve allowing continuous
flow. |
| |
3) |
Excessive pump slippage. |
| |
4) |
Excessive valve internal
leakage. |
| |
5) |
Insufficient system capacity
(reservoir size too small). |
| |
6) |
Insufficient reservoir baffles. |
| |
7) |
Reservoir return line outlet
too close to pump suction
line. |
| |
8) |
Pipe tubing, and/or hose
inside diameter too small,
causing high turbulence. |
| |
9) |
Valving too small, causing
high turbulence. |
| |
10) |
Poor air circulation around
reservoir. |
| |
11) |
System relief valve set
too high. |
