Bolens QS Series Service Manual page 74

OS, QT
&
1900 SERIES
TRACTORS
Page 5-10 REV. 4/83
CHASSIS (Continued)
POWER TAKE-OFF (P.T.O.)
TROUBLESHOOTING
Electrical Data -
See wiring diagram in the electri-
cal section of this manual.
a. Clutch does not engage -Check
electrical system for broken
wires or bad connections.
Check voltage at clutch lead.
Voltmeter should read more
than 10 volts. If voltmeter
does not register a reading,
look for broken wires or con-
nect clutch lead and check
resistance reading of clutch
coil. A normal resistance
reading should be between
3.0 and 2.3 ohms. A reading
outside these values indicates
a faulty coil. The field as-
sembly should then be
replaced. Check armature/
rotor air gap. This is done by
inserting a feeler gauge in the
(4) slots provided in the
brake flange. The gap should
be between .01 0" - .020" (0.25
- 0.51 mm) with the
clutch/brake switch in the
"off" position. If the gap is
greater, readjust brake as de-
scribed under maintenance.
b. Engine driven attachment
rotates slower than normal,
check for loose belts.
Inspect engine driven
attachment with clutch belt
removed. Attachment should
turn freely.
Check clutch/brake pulley
grooves for grease or oil.
Check clutch/brake working
surfaces for grease or oil.
NOTE:
REMOVE GREASE OR OIL
FROM CLUTCH/BRAKE .
WORKING SURFACES AS
OUTLINED UNDER MAIN-
TENANCE.
Check wiring system for an intermittent break or poor electrical connection.
ELECTRIC P.T.O. CLUTCH
SPECIFICATIONS
1666 0100101 to 0199999
Voltage 12 VDC
Resistance 3.2 Ohms
Current Draw 3.8 Amps
ONE OF FOUR CLEARANCE
ADJUSTMENT WINDOWS
USE LOCTITE PIPE
SEALANT ON TWO
LOWER STUDS
1666 & 1966 0200101 and later
Voltage
Resistance
Current Draw
12 VDC
2.5 Ohms
4.7 Amps
POLARIZED PLUG
ROTOR
.D10/.015 CLEARANCE
BRONZE WASHER
AT EACH OF FOUR WINDOWS
TORQUE ALL FOUR
MOUNTING STUDS TO
20 FT. LBS. EACH
FIGURE 5-20
'
)