30
INSIDE EDGE
To relieve the brake pressure on the flywheel, compress
the spring by moving the lever toward the spark plug,
when the hole in the lever aligns with the hole in the
bracket, secure the lever with alignment tool 670298
then remove the flywheel (diag. 7). Remove the alignment
tool. Release the spring tension by unhooking the short
end of the spring from bracket with a pliers. Remove
the E clip from the brake pad shaft. Slide the pad
lever from the shaft and unhook the link. Inspect the
brake pad for dirt, oil or grease contamination. If the
pad is contaminated, or if there is less than .060" (1.524
mm) of brake pad material at the pad's thinnest point,
replacement is necessary. The brake pad is bonded
to the brake lever and must be replaced as an assembly.
Rehook the link, install the brake lever and pad assembly,
install the "E" clip, rehook the short end of the spring
and continue to reassemble the brake system in the
reverse order of disassembly.
IGNITION GROUND OUT TERMINAL
Inspect the ignition kill switch grounding clip for proper
alignment and contact with the brake arm. Insure that
all electrical connections are clean and secure.
SHORT END OF SPRING
SWITCH
LEVER
670298
ALIGN HOLES
GROUNDING CLIP
"E" CLIP
GROUNDING CLIP POSITION
LINKAGE
BRAKE PAD
To replace the interlock switch, carefully grind the
heads off of the rivets that fasten the interlock switch
to the brake bracket. Remove the rivets from the back
side of brake bracket. Use the self-tapping screw
supplied with the new switch to make threads in the
bracket. Install the interlock switch onto the brake
bracket in the proper position and secure the switch
to the brake bracket with the machine screws supplied.
Be careful not to overtighten the screws as switch
breakage can occur.
CONTROL CABLE
INSIDE EDGE
If replacing the cable conduit screw with a screw other
than a service part replacement, be certain that the
screw length is not too long as to prevent free travel
of the lever. Make sure the button on the starter interlock
switch is completely depressed when the control is
fully applied. The cable must provide enough travel
so the brake will contact the flywheel. Some slack
should exist in the cable adjustment to compensate
for brake pad wear.
MACHINE
SCREWS
SELF TAPPING
SCREW
When installing a inside edge brake bracket assembly,
be sure the slotted holes in the brake bracket are all
the way down on the fasteners. This will properly align
the brake bracket to the flywheel brake surface.
SCREW END MUST
NOT BLOCK LEVER
ACTION
CABLE CLAMP
SCREW
STARTER INTERLOCK SWITCH
The engine / blade control must close the interlock
switch before the starter can be engaged. To check
the interlock switch, use an ohmmeter or continuity
light to perform a continuity check. Continuity should
exist between the two terminals when the interlock
switch button is completely depressed. No continuity
should exist when the button is released. If the switch
fails replace the switch.
MOUNTING HOLES
Ô
Ô
MECHANISM FULL DOWN
BEFORE SCREWS TORQUED
Summary of Contents for AH520 -
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