30
- ORIGINAL INSTRUCTIONS -
DISCONNECT POWER FROM
THE MACHINE!
PROBLEM--Spin Drive not working in relief mode.
Assuming (SSS) System Start Switch is on with 120 volts AC to control panel and all other functions are
working.
Verify all wires shown on the wiring diagram are correct and pull on wire terminals with approximately
3 lbs force to verify there are no loose terminal connections and/or no loose crimps between the wire
and the terminal. If problem persists, test as listed below.
Possible Cause
Checkout Procedure
DISCONNECT POWER FROM
THE MACHINE!
Relief Torque Pot (RTP)
set to zero.
Spin Motor Switch (SMS)
is not on.
Circuit Breaker is Tripped
(4 AMP)
Spin Drive Control (SDC) is
not working
CB or Spin Motor Switch
(SMS) is bad
Spin Drive motor is bad
Worn Motor Brushes
Spin Motor works.
Yes--end troubleshooting
No--go to Step
B.
next
Spin Motor works.
Yes--end troubleshooting
No--go to Step
C.
next
Spin Motor works.
Yes--end troubleshooting
No--go to step
D.
next
((SDC)Remove wires to Terminals L1 and
L2 and test between wires for 120V AC.
Yes--reconnect wires, go to Step
F.
No--Go to Step
E
. next
Remove Wire to SMS Terminal 6 "89SMS-
6" and check between the wire and
neutral (blue) terminal out of (FTR)
(02FTRBU) for 120 VAC
Yes--Check switch continuity, replace
No--Check CB continuity, replace.
Check for approx. 20 VDC from
Terminal Strip 1 Terminal 4 (48TB1-4) to
Terminal 5 (49TB1-5)
Yes--go to Step
G.
next
No--Go to Step
J
.
Remove motor wires at Terminal Strip 1
(left side lower strip), Term 4 & 5 and check
0 ohms across the black and white motor
wires
Yes--end troubleshooting. Motor should
work (if it does not, replace motor)
No--go to Step
H.
next
Remove the brushes one at a time and
maintain orientation for reinsertion. See
if brush is worn short 3/8" (10 mm) mini
-
mum length
Yes--replace motor brushes
No--replace Spin Drive Motor
A.
Set (RTP) to 20 on the
control panel.
B.
Turn (SMS) switch on.
C.
Reset Circiut Breaker on the
right side of the machine. Push
in if tripped.
D.
Check (SDC) L1 to L2 for 120
Volts AC
E.
Check power into (SMS)
terminal 6 for 120 Volts AC
F.
Check (SDC) A1 & A2 for ap
-
prox. 20 Volts DC (Have Relief
Torque set to maximum torque
- full clockwise.
G.
Check spin motor continuity
H.
Inspect Motor Brushes
ELECTRICAL TROUBLESHOOTING
Summary of Contents for 555 SRI
Page 42: ...42 ORIGINAL INSTRUCTIONS 55761 EXPLODED VIEW DOOR ASSEMBLY ...
Page 44: ...44 ORIGINAL INSTRUCTIONS 6329575 EXPLODED VIEW REAR GUARD DOOR ASSY ...
Page 46: ...46 ORIGINAL INSTRUCTIONS 6329575 EXPLODED VIEW REAR GUARD DOOR ASSY ...
Page 48: ...48 ORIGINAL INSTRUCTIONS 55583 EXPLODED VIEW GRINDING HEAD ASSEMBLY ...
Page 50: ...50 55451 EXPLODED VIEW PIVOT ARM GRINDING SHAFT ASSY 1 of 2 ...
Page 52: ...52 55451 EXPLODED VIEW PIVOT ARM GRINDING SHAFT ASSY 2 of 2 ...
Page 54: ...54 ORIGINAL INSTRUCTIONS 55563 EXPLODED VIEW TRAVERSE DRIVE ASSEMBLY ...
Page 56: ...56 ORIGINAL INSTRUCTIONS 55452 EXPLODED VIEW MOWER SUPPORT ASSEMBLY ...
Page 58: ...58 ORIGINAL INSTRUCTIONS EXPLODED VIEW VERTICAL MOWER SUPPORT ASSEMBLY ...
Page 60: ...60 ORIGINAL INSTRUCTIONS 55708 EXPLODED VIEW CARTON ASSEMBLY ...
Page 62: ...62 ORIGINAL INSTRUCTIONS EXPLODED VIEW ALIGNMENT GAGE ASSEMBLY ...
Page 66: ...66 ORIGINAL INSTRUCTIONS 55628 EXPLODED VIEW SPIN DRIVE ASSEMBLY 2 5 1 3 6 4 7 9 ...
Page 68: ...68 ORIGINAL INSTRUCTIONS EXPLODED VIEW CONTROLS ASSEMBLY ...
Page 70: ...70 ORIGINAL INSTRUCTIONS EXPLODED VIEW ELECTRIC PANEL SUB ASSEMBLY ...
Page 72: ...72 ORIGINAL INSTRUCTIONS 55041 WIRING DIAGRAM ...