Troubleshooting Pto Clutch; Model 612, 614, 616, 718, 718K And 720K - Grasshopper 720 Service Manual

Steering levers
MODEL 612, 614, 616, 718,
out and PTO
718K and 720K
switch 'ON'.
Voltage tests
are performed
with a voltmeter
or test light to
battery ground.
Key switch in the
'RUN' position,
but engine is
not running.
Yes
Does voltage Does voltage
appear from
appear from
terminal 'E' of terminal 'F' of
PTO fuse to PTO fuse to
ground (figure
39)?
No
Replace PTO
Key switch or
wiring from key
switch to PTO
fuse is defective.
KEY
SWI TCH
IN RUN POSITION
RD
+
S
L
M
B G

TROUBLESHOOTING PTO CLUTCH

Yes
Does voltage
appear from
brown wire at
PTO clutch plug
ground?
to ground?
No
Replace PTO
fuse.
switch.
PTO
FUSE
BR
BK
Figure 38
NOTES:
1. To see the wiring diagram for
models with serial numbers of
340725 and higher, refer to
figure 44 on page 44.
Yes
Does green wire
of PTO clutch
show ground?
No
Test ground
No
connections on
clutch.
PTO
SWI TCH
PTO ON
GR
BR
40
Yes
Test PTO clutch
and terminals.
Verify air gap of
.012" on electric
clutch. (see
owner's manual.)
Test clutch by
reading ohm's
across clutch
plug (plug
disconnected).
Resistance
should measure
approximately
2.3 to 2.7 ohms.
A
30
REG.
CLUTCH
C
7.5
START
E
7.5
PTO
G
7.5
LI GHT
Figure 39
B
D
F
H