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spider f ailscompletely, youwill
experience a loss of
power.
_lb
ARNING: Never hitthe engine shaft in
any manner, as a blow willcause permanent
damage to the engine or the pump.
Follow the instructionscarefully as the alignmentof
the couplings is critical.
•
Disconnect the spark plug wire from the spark
plug, and keep it away from the spark plug.
•
Using a 112inch wrench, remove three nuts and
look washers which secure the pumpto the
coupling shield. Two nuts are at the bottom
comers and one is in the top center. See Figure
17. Remove the pump.
•
Remove the nylon spider insertfrom the
coupling and inspect for wear. Replace if
necessary.
•
Inspect the engine couplinghalf jawsfor signsof
wear. Replace if necessary.
Coupling Shield
Rear Coupling
Support Bracket
Lock
Washer
Hex
Coupling
lo
Half
ck
Washer
Figure 17
•
To replace engine coupling half: Rotate the
engine by pulling starter handle untilengine
coupling half set screw is at bottom.Loosen set
screw using 1/8 inch allen wrench. Slide
coupling half off engine shaft. See Figure 17.
•
install new coupling half on engine shaft making
sure to align key way in coupling half with key in
the engine shaft.
•
Slide coupler half along engine shaft until the
end of the shaft is flush with the inner portion of
the coupling half. (There must be space
between end of the engine support bracket and
the couplinghalf.) Apply Loctife
TM
to threads of
set screw and torque to 78 inch-pounds.
Inspectthe pump coupling halfjaws for signs of
wear. Replace if necessary.
To replace pump coupling half: Loosen set
screw using 1/8 inch allen wrench. Slide
coupling half off pump shaft.
Install new couplinghalf on pump shaft making
sure to align key way in coupling half with key in
pump shaft. Rotate coupling half until set screw
faces down. Do not tighten set screw now.
Install new spider insert on to the engine
coupling half.
Align pumpcoupling half with nylon "spider" by
rotatingengine using starter handle.
Slide couplinghalf intoplace while guiding three
mounting bolts through holes in pump support
bracket.
Note: The pump couplinghalf can be rotated by hand
to aid in alignment, ff the twoparts are not aligned
dght, the unit willnot operate propedy and damage
could occur.
•
Secure with nuts and washers removed earlier.
•
Set .035 to .060 inchclearance between the
nylon=spider" and the engine coupling half by
sliding a matchbox cover between the nylon
"spider" and the engine couplinghalf and
moving pump couplinghalf as needed. See
Figure 18.
•
Apply Loctite
TM
to threads of set screw. Tighten
set screw to torque 78 inch-lbs. This should
secure the pump couplinghalf.
•
Reattach spark plug wire to spark plug.
PUMP
Set Screw
Nylon
Insert
Clearance
ENGINE
Figure
18
• Steel
Halves
16
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