Kohler LH630-775 Service Manual page 101

Section 8
Electrical System and Components
Electric Starting Motors
These engines utilize solenoid shift style starter
motors for dependable operation. Operation, service
and troubleshooting of the starter and starter system
follow in this section.
Starting Motor Precautions
NOTE: Do not crank the engine continuously for
more than 10 seconds at a time. If the engine
does not start, allow a 60 second cool-down
period between starting attempts. Failure to
follow these guidelines can burn out the
starter motor.
NOTE: If the engine develops sufficient speed to
disengage the starter pinion but does not
keep running (a false start), the engine
rotation must be allowed to come to a
complete stop before attempting to restart
the engine. If the starter is engaged while the
flywheel is rotating, the starter pinion and
flywheel ring gear may clash, resulting in
damage to the starter.
Troubleshooting Guide – Starting Difficulties
Problem
Possible Fault
Starter
Does Not
Energize
Starter Switch
or Solenoid
Starter
Energizes
But Turns
Slowly
Transmission
8.12
1. Check the specific gravity of battery. If low, recharge or replace
Battery
battery as necessary.
1. Clean corroded connections and tighten loose connections.
Wiring
2. Replace wires in poor condition and with frayed or broken
insulation.
1. Bypass the switch or solenoid with a jumper wire. If starter
cranks normally, replace the faulty component. Solenoid Shift
Starters: Perform individual solenoid test procedure. See pages
8.21 and 8.22.
1. Check the specific gravity of battery. If low, recharge or replace
battery as necessary.
Battery
2. Battery too small, must be at least 400 cold cranking amps .
1. Check for excessively dirty or worn brushes and commutator.
Brushes Clean using a coarse cloth (not emery cloth).
2. Replace brushes if excessively or unevenly worn.
1. Make sure the clutch or transmission is disengaged or placed in
neutral. This is especially important on equipment with
hydrostatic drive. The transmission must be exactly in neutral to
or
prevent resistance which could keep the engine from starting.
Engine
2. Check for seized engine components such as the bearings,
connecting rod, and piston.
NOTE: If the starter does not crank the engine, shut
off the starter immediately. Do not make
further attempts to start the engine until the
condition is corrected.
NOTE: Do not drop the starter or strike the starter
frame. Doing so can damage the starter.
Starter Removal and Installation
Refer to the "Disassembly" and "Reassembly"
Sections for starter removal and installation
procedures.
Use the exploded view (Figure 8-26) for reference
during the disassembly and reassembly procedure.
Correction