Governor System - Linkage; Dla Details; Gcu/Harness Diagnostics And Troubleshooting - Kohler ECV940 Service Manual

Governor System
Linkage
NOTE: Throttle linkage spring must be in place and
installed correctly to ensure proper throttle
operation and performance.
Throttle linkage spring will fully open throttle plate if
linkage becomes detached from DLA. This will create an
overspeed condition causing engine to shut down. DLA
shaft will have to be manually screwed back into body,
and then retracted before reassembling linkage.
Adjustment

DLA Details

A
G
A DLA
C Clevis
E Clevis Shaft
G Keys
DLA must be in fully retracted position during assembly.
Full range of throttle plate movement will not be
achieved if DLA is partially extended when assembled.
Loosen DLA mounting plate screws located on side
of actuator plate. With throttle linkage secured with a
retaining clip at end of DLA shaft, slide DLA bracket
assembly back until throttle plate is fully open. Torque
mounting plate screws to 10.2 N·m (90 in. lb.).
Proper link/spring assembly is critical. Insert spring
hook tab of spring through DLA clevis hole until it exits
opposite side, and tab of spring is allowed to snap into
position. Hook opposite "hook" end of spring through
throttle body lever adapter hole before inserting z-bend
of link into throttle body lever adapter. Pay close
attention not to stretch/over extend spring or damage to
spring may occur.
If clevis shaft becomes overextended or disconnected
from actuator reinstall as follows:
1. Disconnect linkage and remove DLA from bracket.
2. Remove clevis shaft completely out of DLA.
3. Reinstall rubber boot onto DLA if required.
46
B
B
C
E
D
F
B Mounting Holes
D Keyway
F Rubber Boot
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4. Place clevis shaft into actuator. Rotate clevis shaft
clockwise 3 full turns, applying slight pressure, until
you feel clevis shaft keyway make contact with key
in actuator. When clevis shaft is installed properly
fl at of clevis will be aligned with two mounting holes.
NOTE: Continuing to rotate clevis shaft after it has
made contact with keyway will damage keyway
or actuator.
5. Confi rm that key and keyway are in alignment, by
hand, press clevis shaft into actuator. It will take a
reasonable amount of pressure to do this. If shaft will
not move inward, do not force it. Remove clevis
shaft and repeat previous step.
6. Reinstall DLA into bracket, torque screws to 7.3 N·m
(65 in. lb.), and connect linkage.

GCU/Harness Diagnostics and Troubleshooting

NOTE: It is important to use proper sized probes to
perform these tests. Probes that are incorrect
size can damage connector or harness plug.
A
Ground and Power Tests
1. Switch key to OFF position.
2. Remove GCU from bracket and unplug wiring
harness.
These two tests check for power and ground supply
to GCU. If either test fails, check if harness, electrical
C
connections, or electrical system need repair.
Test 1 Probe Location
A
Test 1: Identify probe location in connector. Using a
continuity tester, check for a good ground. If ground is
faulty, inspect unit ground, battery ground, connectors,
and wiring harness. Clean or fi x connections or replace
any faulty parts.
If test 1 checks OK, locate probe location in connector,
and check using test 2.
A
Probe Location for Ground Test 1.
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