Tecumseh AH520 -, Руководство пользователя

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20
REWIND STARTERS
GENERAL INFORMATION
Rewind starters used on vertical shaft Tecumseh engines
are top mount horizontal pull style or side mount vertical
pull style. Horizontal shaft engines use side mounted
starters which can be mounted to pull either vertically
or horizontally. All rewind starters except the vertical
pull style turn the engine over by engaging a dog(s)
into the starter cup attached to the engine flywheel.
The vertical pull starter engages the starter gear into
the ring gear of the flywheel to turn the engine over.
All starters are spring loaded to retract the dog(s) or
starter gear when the engine speed exceeds the turning
speed of the starter.
OPERATION
As the starter rope is pulled, the starter pulley rotates
on the center pin. The starter dog(s) is pinned or
pocketed in the pulley hub and extends outward when
the pulley's rotation forces the starter dog(s) to contact
the ears on the retainer. The retainer ears act as a
ramp to fully extend the starter dog(s). The fully extended
starter dog(s) locks in contact with notches in the
starter cup. When the engine fires and the rotational
speed of the starter cup exceeds the starter pulley,
the starter dog(s) disengages from the starter cup.
The starter dog spring(s) returns the starter dog(s)
to the disengaged position. The recoil spring turns the
starter pulley in the opposite direction, retracting the
starter rope until the handle contacts the stop.
COMPONENTS
REWIND STARTERS, ELECTRIC STARTERS AND
ALTERNATORS
SERVICE
Starter related problems will require the starter to be
removed from the engine to diagnose the cause. Visually
inspect the starter dog(s), starter cup, retainer, springs,
rope, washers, and the starter pulley for wear or breakage.
Use one of the following procedures that applies to
your application, to disassemble, repair, and assemble
the starter. Always consult the Tecumseh Master Parts
Manual for the correct replacement parts.
ROPE SERVICE
Rope replacement should be done using the correct
part number replacement rope or braided rope of the
correct diameter and length. Consult the Tecumseh
Master Parts Manual to obtain the correct part number,
length, and size required. Use the following rope chart
to convert a numbered rope to a fractional diameter
for bulk rope use.
# 4 1/2 rope = 9/64" (3.572 mm) diameter
Part No. 730526 -100' (30.48 meters)
spool
# 5 rope = 5/32" (3.964 mm) diameter
Part No. 730514 - 100' (30.48 meters)
spool
# 6 rope = 3/16" (4.762 mm) diameter
Part No. 730516 - 100' (30.48 meters)
spool
Standard rope lengths
54" (16.5 meters) standard stamped steel starter
61" (18.6 meters) vertical pull - horizontal engagement
type
65" (20 meters) vertical pull - vertical engagement
type
85" (26 meters) extended handlebar rope start
(compliance)
Check the old rope for the right length for the application.
Some applications require longer lengths. The rope
ends should be cauterized by burning with a match
and wiping the rope end with a cloth while hot.
Rope replacement can be done without the starter being
disassembled on vertical pull starters that have "V"
notches in the bracket. Use the following procedure
for rope replacement.
1. Remove the starter assembly from the engine.
2. Turn the pulley until the staple in the pulley lines
up with the "V" notch. Pry out the staple with a
small screwdriver and remove the original rope.
SPRING PIN
BRAKE SPRING
WASHER
WASHER
RETAINER
HANDLE
ROPE
STARTER HOUSING
PULLEY AND REWIND
SPRING ASSY.
STARTER DOG
DOG SPRING