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WARNING: Do not at any time make any
adjustments without first stopping
engine, disconnecting spark plug wire,
and grounding it against the engine.
WedgeAssemblyAdJustment
As normal wear occurs and there is excessive "play"
between the wedge and beam, adjust the bolts on the
side of the wedge assembly to eliminate the excess
space between the wedge and beam. See Figure 10.
• Loosen the jam nuts on the two adjustment bolts
on the side of the wedge. Turn the adjustment
bolts in until snug and then back them off slowly
until the wedge assembly will slide on the beam.
• Tighten the jam nuts securely against the side of
the wedge to hold the adjustment bolts in this
position.
GibPlateAdjustment
Periodically remove and replace the "gibs" (spacers)
between the wedge plate and the back plate.
See Figure 10.
NOTE: The gibs may be rotated and/or turned over
for even wear.
• Loosen the lock nuts under the each back plate
and slide the gibs out.
• Turn or replace the gibs.
• Reassemble the back plate and secure with the
lock washers and lock nuts.
• Readjust the bolts on the side of the wedge
assembly.
;dlt:tment
HexJam Nut ,_ "_'_
Lock Nut__.__._.___ "_
_ _"_ _vOCker
Figure 10
HoseClamps
Check the hose clamps onthe suction hose (attached
to side ofthe pump) for propertightness before each
use. Check the hose clamps on the return hose at
least once a season.
FlexiblePumpCoupler
The flexible pump coupler is a nylon "spide¢' insert,
located between the pump and engine shaft. Over a
period of time, the coupler will harden and
deteriorate.
Replacement is needed if you detect vibration or
noise coming from the area between the engine and
the pump. If the coupler fails completely, you will
experience a loss of power.
IMPORTANT:Never hit the engine shaft in any
manner, as a blow will cause permanent damage to
the engine.
When replacing the flexible pump coupler, proceed
as follows:
• Remove three nuts and lock washers that secure
the pump to the coupling shield. Two nuts are at
the bottom corners and one is in the top center.
• Remove the pump.
• Rotate the engine by slowly pulling starter handle
until engine coupling half set screw is visible.
Loosen set screw using allen wrench and slide
coupling half off of engine shaft.
• Loosen set screw on pump coupling half and
remove coupling half.
• Slide new engine coupling half onto the 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 coupling halo. Tighten set screw.
• Install pump coupling half and key on pump shaft.
Rotate coupling half until set screw faces opening
in shield. Do not tighten set screw.
• Install nylon "spider" onto engine coupling half.
• Align pump coupling half with nylon "spider" by
rotating engine using starter handle. Slide
coupling half into place while guiding three
mounting bolts through holes in pump support
bracket.
• Secure with nuts and washers removed earlier.
• Set .010" to .060" clearance between the nylon
"spider" and the engine coupling half by sliding a
matchbook cover between the nylon "spider" and
the engine coupling half and moving pump
coupling half as needed. Secure pump coupling
half with set screw. See Figure 11.
NOTE: Make certain proper clearance is obtained
before tightening set screw.
12
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