Tecumseh HM70 User Manual

62
MOUNTING HOLES
SCREW END MUST
NOT BLOCK LEVER
ACTION
13
11
10
Ô
Ô
CABLE CLAMP
SCREW
STOP
MECHANISM FULL DOWN
BEFORE SCREWS TORQUED
MACHINE
SCREWS
SELF TAPPING
SCREW
14
12
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 (diag. 10).
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 (diag. 11).
CONTROL CABLE
Bottom Surface
The control cable conduit must be assembled against
the stop in the bracket. Make sure the bottom of the
lever completely depresses the button on the starter
interlock switch, if equipped, 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 (diag. 12).
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 (diag. 13).
BRAKE BRACKET REPLACEMENT
The tension must be relieved on the lower brake spring
prior to the removal of the top electric starter bolt, or
damage to the threads in the cylinder block can occur.
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 (diag.
14).

Tecumseh HM70 Specifications

General

Brand	Tecumseh
Model	HM70
Category	Engine
Language	English