Kohler Command CV730 User Manual download pdf (Page 88)

5B.21

Section 5B

EFI Fuel System

Fuel Rail

6. Install the new regulator by carefully pushing

and rotating it slightly into the base or housing.

a. External Regulators with Square Base

Housing Only; Install a new O-Ring between

the regulator and the mounting bracket. Set

the mounting bracket into position.

b. Secure the regulator in the base with the

original retaining ring or screws. Be careful

not to dent or damage the body of the

regulator as operating performance can be

affected.

7. Reassemble and connect any parts removed in

step 3.

8. Reconnect the negative (-) battery cable.

9. Recheck regulated system pressure at fuel rail test

valve.

Fuel Filter

EFI engines use a high-volume, high-pressure, 10-15

micron, in-line fuel filter.

Figure 5B-29. In-Line Fuel Filter.

Service

Filter replacement is recommended every 1500 hours

of operation or more frequently under extremely

dusty or dirty conditions. Use only the specified filter,

and install it according to the directional arrows. Do

not use a substitute filter as operating performance

and safety can be affected. Relieve system pressure

through the safety valve in the fuel rail before

servicing.

Figure 5B-30. Throttle Body/Intake Manifold.

General

The fuel rail is a formed tube assembly that feeds fuel

to the top of the injectors. The tops of the injectors fit

into formed cups in the fuel rail. When the rail is

fastened to the manifold, the injectors are locked into

place. A small retaining clip provides a secondary

lock. Incorporated into the fuel rail is a pressure relief/

test valve for testing operating pressure or relieving

fuel system pressure for servicing. The fuel supply

line is attached to the barbed end of the fuel rail with

an Oetiker hose clamp.

Service

The fuel rail is mounted to the throttle body/intake

manifold. No specific servicing is required unless

operating conditions indicate that it needs internal

cleaning or replacement. It can be detached by

removing the two mounting screws and the injector

retaining clips. Thoroughly clean the area around all

joints and relieve any pressure before starting any

disassembly.

Fuel Line

Locking Cups

Fuel Rail

TPS

Fuel Injector

Figure 5B-31. High Pressure Fuel Line.

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Kohler Command CV730 User Manual Page 88

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