Fleetguard Winslow 91292N Service Instructions Manual

C
D

Winslow® Stationary Multiple

Element Design Fuel Coalescer

Service Instructions

Parts List

A
B

E

Part Description Part Number

Cover Assembly

A

O-Ring

B

Seal Nut Assembly

C

Gasket

D

Filter Element

E

Housing

F

Q80660A

Q79058

Q53779

Q58878

88472N

91292N

E CAUTION: These instructions are intended for use by professional mechanics who are trained in the proper

use of power and hand tools, using appropriate safety precautions (including eye protection).

F

page 2

Introduction

Unlike mechanical separators, the Winslow® Fuel
Filter/Coalescer can be installed on either the
pressure or suction side of the transfer or fuel pump.

Pressure Side

Pressure side installation is preferred because it
reduces fuel flow problems by eliminating air trapped
in the housing. With the first installation, or when the
unit has been serviced with an element change, the
cover vent valve is opened when the fuel pressure
is applied. Once the air in the unit has been purged
and the housing is filled, the valve should be closed.
The cover should be inspected for any possible fuel
leaks.

Suction Side

The fuel level from a storage source should be
higher than the housing in order for the inlet to
the filter assembly to have the necessary positive
pressure.

If a positive pressure is not available and the fuel
source is lower than the housing, the suction lift
or rise should not exceed 10' (3 m) to the housing
due to possible negative pressure into the housing
exceeding one atmosphere (14.7 lb/in
sea level. Also, line lengths must be kept as short as
possible.

It is also recommended that a check valve be
installed in the suction line close to the fuel supply
to prevent drain back and facilitate adding fuel to the
housing when elements have been changed. The
filters will have to be manually refilled after servicing.
Secure all fittings and cover bolts to prevent air
entrainment.

Existing filters in the system can be left in place,
whether up- or down-stream from the Coalescer.
Up-stream filters protect the Coalescer element
from large dirt particles that can eventually clog the
Coalescer. The Coalescer can work indefinitely,
removing water, if it doesn't become plugged
with dirt.

2

(1 bar)) at

If installed on the suction (vacuum) side, the housing
must be filled with fuel before operating the engine.
If installed on the pressure side, priming is not
necessary, but recommended.

If the application is for fuel transfer or a dispensing
pump where there is head pressure on the
Coalescer, a flow control valve must be installed at
the inlet port.

Because the Coalescer functions similarly
to a particulate or conventional filter, similar
troubleshooting procedures should be followed.

Servicing the Water Drain

1. Turn off the pump engine.

2. To remove water from the sump, loosen the drain

valve and allow the collected water to drain. (For
suction (vacuum) side installations, open the vent
to allow drainage.)

3. Tighten the valve as soon as fuel begins to drain.
(For suction (vacuum) side installations, close the
vent.)

Servicing the Elements

Elements should be changed when the pressure
drop across the element reaches 8-10 PSID
(55.2-69.0 kPa), or when the maximum pressure
differential the system can tolerate is reached,
providing the pressure differential is less than or
equal to 8-10 PSID (55.2-69.0 kPa).

If a pressure gauge is not used, elements should
be changed every six months or when engine
performance declines, indicating insufficient fuel
supply to the engine. A vacuum or differential
pressure gauge is strongly recommended.

Element change-out frequency is dependent on the
degree of solid and semi-solid contaminants present
in the fluid being conditioned. The amount of water
in the fuel does not affect the element change-out
frequency. Barring contamination, the Coalescer
would continue to coalesce and separate water from
fuel indefinitely.

Installation

To install on an engine or Cummins® Fuel Regen
System, cut into the fuel line and install with proper
fittings to connect to the Coalescer. Mount the
Coalescer with enough space to service the water
drain and for element replacement.

If an excessive amount of asphaltines or gums in
the fuel being conditioned is suspected, it would be
evidenced by relatively short change-out cycles.