Kohler Command PRO EFI ECH749 [178/180] Reassembly
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Kohler Command PRO EFI ECH749 [178/180] Reassembly

Kohler Command PRO EFI ECH749 [178/180] Reassembly
Install Oil Cooler (if equipped)
1. Secure adapter to closure plate with oil fi lter nipple.
Torque oil fi lter nipple to 28.5 N·m (21 ft. lb.).
2. Verify all fuel and vent hoses are routed properly and
not pinched. Install 2 screws securing oil cooler to
blower housing. Torque screw between hoses to 2.3
N·m (20 in. lb.) and outer screw to 2.8 N·m (25 in.
lb.).
Install Oil Filter and Fill Crankcase with Oil
NOTE: If testing oil pressure after completing
reassembly, install oil pressure adapter instead
of oil fi lter.
NOTE: Make sure oil drain plug is installed and torqued
to specifi cation to prevent oil leakage.
NOTE: Some models are equipped with an oil drain
valve.
1. Install oil drain plug. Torque plug to 13.6 N·m (10 ft.
lb.).
2. Place new fi lter in shallow pan with open end up. Fill
with new oil until oil reaches bottom of threads. Allow
2 minutes for oil to be absorbed by fi lter material.
3. Apply a thin fi lm of clean oil to rubber gasket on oil
fi lter.
4. Refer to instructions on oil fi lter for proper
installation.
5. Fill crankcase with new oil. Level should be at top of
indicator on dipstick.
6. Reinstall oil fi ll cap/dipstick and tighten securely.
Connect Spark Plug Leads
Connect leads to spark plugs.
Prepare Engine for Operation (ECH EFI)
NOTE: If ECU, throttle body, TPS or fuel pump module
were replaced, an ECU Reset and TPS Learn is
required. Refer to Electrical System for ECU
Reset and TPS Learn procedure.
Engine is now completely reassembled. Before starting
or operating engine, be sure to do following.
1. Make sure all hardware is tightened securely.
2. Make sure oil drain plugs, Oil Sentry™ pressure
switch, and a new oil fi lter are installed.
3. Verify crankcase has been fi lled with correct amount,
weight, and type of oil. Refer to oil recommendations
and procedures in Maintenance, Specifi cations, and
Lubrication System.
4. Adjust idle speed adjusting screw as necessary.
Refer to Fuel System.
5. Turn on fuel supply.
Sensitivity Adjustment (if equipped)
B
A
C
D
E
A Governor Lever B Hole 1
C Hole 2 D Hole 3
E Hole 4
Governor sensitivity is adjusted by repositioning
governor spring in holes of governor lever. If speed
surging occurs with a change in engine load, governor
is set too sensitive. If a big drop in speed occurs when
normal load is applied, governor should be set for
greater sensitivity. Adjust as follows:
1. To increase sensitivity, move spring closer to
governor lever pivot point.
2. To decrease sensitivity, move spring away from
governor lever pivot point.
Testing Engine
ECH EFI
It is recommended engine be operated on a test stand
or bench prior to installation in piece of equipment.
1. Set engine up on a test stand. Start engine, inspect
for leaks and check to make certain oil pressure (20
psi or more) is present. Run engine at idle for 2-3
minutes, then 5-6 minutes more between idle and
midrange.
2. Adjust idle speed screw located on throttle body as
necessary. Standard idle speed setting for EFI
engines is 1500 RPM, but certain applications might
require a diff erent setting.
3. Adjust high-speed stop as necessary located on
control panel (if so equipped). Make sure maximum
engine speed does not exceed 4200 RPM (no load).
ETB ECH EFI
Engines equipped with an electronic throttle body (ETB)
cannot be tested on a test stand or bench. Install engine
in application.
Reassembly
178 24 690 01 Rev. OKohlerEngines.com

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