Fleetguard CV50203, CV50204, CV50205 Installation Instructions Manual

Fleetguard® Open

Crankcase Ventilation (OCV) Kit

Installation Instructions

Installation Instructions for:
CV50203 301-400 HP Applications
CV50204 401-425 HP Applications
CV50205 526-640 HP Applications

CC

DD

EE

GG

JJ1 JJ2

BB

HH

AA

FF

Parts List

Part Description

Breather Assembly (CV Unit) and Bracket

AA

Drain Hose Assembly

BB

Vent Hose

CC

Vent Hose Connector and Clamps

DD

Vent Hose Extender

EE

Cylinder Block Insert Fittings and Coupler

FF

Inlet Hose Assembly

GG

Breather (CV Unit) Hose Connections and Clamps

HH

Inlet Hose Connections and Clamps

JJ

Tools Required

Description

Hose Clamp Pliers

Hose Cutter

3/8" to 1" Ratchet and Socket Set

3/8" to 1" Wrench Set

JJ3

JJ4

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).

E CAUTION: Use of this application will

cause an increase in the engine
crankcase pressure. The installer
is responsible for the verification
that this application is appropriate
and that related crankcase
pressure issues do not arise.

page 2

Crankcase Ventilation Kit Installation

Preinstallation

The Fleetguard® OCV Kit can be installed on many
different engine platforms. Since engine design
varies broadly, connection and fitting sizes will
also vary by engine. To accommodate a broad
range of applications, the kit includes extra fittings,
connectors, clamps, and hoses. These parts
have been packaged in different packs to assist
you in choosing the right parts for your specific
application. Since many of these parts appear to
be very similar, we strongly suggest not opening
the individual packs until you have determined
what specific parts you will need for your engine
application. Each pack is identified with a label
(JJ1, JJ2, for example) to reference its use in the
appropriate installation step.

In some engine applications, the crankcase drain
fitting for connecting and routing the drain line to
the crankcase may need to be purchased from the
engine manufacturer. We strongly suggest not

drilling into the engine block or oil pan to use
one of the fittings included in this kit. Check to
determine if one of the fittings included in pack
“F” can properly be installed in the engine block
before proceeding.

To install the Enviroguard OCV system on engine
platforms with dual breathers, an additional
Enviroguard component kit must be used. This kit
includes an additional inlet hose, a Tee connector
and clamps. This kit allows you to fully adapt
all Enviroguard systems to dual breather engine
designs. The kit is part # 394316000S.

“Hot” (Exhaust Manifold) Side

“Cold” Side

Threaded

Boss

Figure 1 – Mounting Location

2. Find a mounting location for the breather

assembly and bracket at least 14" (350mm)

above the oil level in the crankcase. The
assembly must be a minimum of 4" (100 mm)
from both the exhaust manifold and exhaust
system components.

“Cold” Side

AA

Breather/Bracket

Assembly

14"

(350 mm)

Locating and Mounting the Breather Assembly

1. Check both sides of the cylinder block to
determine the most suitable oil return options.
Unused threaded bosses are usually located
on each side of the engine just above the oil
pan rail. Once the unused bosses are located,
determine the best location for mounting the
breather assembly to ensure the drain hose will
run directly to the crankcase when installed.
It is preferable to use a threaded boss on the
“cold” side of the engine opposite the exhaust
manifold. The drain hose must be free of any

loops, kinks or abrupt bends to ensure proper
oil drainage.

Figure 2 – Installing the Breather/Bracket Assembly

3. The “cold” side of the engine is the preferred
location for mounting. The breather assembly
must be mounted vertically (as shown in

Figure2) for proper operation.

4. Attach the bracket to the mounting location
selected. When the bracket position has been
determined, reverify the breather assembly is
mounted vertically with the oil drain outlets
directed downward.