User's Manual
Table Of Contents
- STT-31EFI Operators Manual 03251
- GENERAL INFORMATION
- SAFETY INFORMATION
- SPECIFICATIONS
- OPERATING INSTRUCTIONS
- 4.1 Controls And Instrument Identification
- 4.2 Safety Interlock System
- 4.3 Initial Run-In Procedures
- 4.4 Starting The Engine
- 4.5 Ground Travel And Steering
- 4.6 Engaging The Deck Drive (Cutter Blades)
- 4.7 Hillside Operation
- 4.8 Parking The Mower
- 4.9 After Operation
- 4.10 Removing Clogged Material
- 4.11 Moving Mower With Engine Stopped
- 4.12 Recommendations For Mowing
- 4.13 Adjusting Cutting Height
- 4.14 Adjusting The Steering Levers
- 4.15 Adjusting The Height Adjust Pedal
- 4.16 Towing (Optional Hitch Accessory)
- TROUBLESHOOTING CUTTING CONDITIONS
- ADJUSTMENTS
- MAINTENANCE
- ILLUSTRATED PARTS LIST
- 8.1 Scag Approved Attachments And Accessories
- ELECTRICAL SCHEMATIC (KOHLER 31HP - EFI)
- REPLACEMENT DECALS AND INFORMATION PLATES
- ELECTRICAL SYSTEM (31HP-EFI KOHLER)
- BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN
- FUEL AND HYDRAULIC SYSTEM - KOHLER 31EFI
- BRAKE AND STEERING COMPONENTS
- DECK DRIVE COMPONENTS
- STT ROLL-OVER PROTECTION SYSTEM - WITH SUSPENSION SEAT
- SHEET METAL COMPONENTS
- CUTTER DECK CONTROLS
- 61V & 72VS CUTTER DECKS
- NOTES
- LIMITED WARRANTY - COMMERCIAL EQUIPMENT
30
R
Section 6
ELECTRIC CLUTCH ADJUSTMENT6.8
The electric clutch serves two functions in the operation of
the mower. In addition to starting and stopping the power
flow to the cutter blades, the clutch also acts as a brake to
assist in stopping blade rotation when the PTO is switched
off or the operator presence circuit is interrupted.
When the clutch is disengaged, the air gap between the
armature and rotor must be adjusted to fifteen thousandths
of an inch, 0.015, for proper operation. The airgap
adjustment is made at three bolts on the clutch. There are
three inspection windows, one next to each adjusting bolt.
See Figure 6-3.
INSPECTION WINDOW (x3)
Clutch Air Gap AdjustmentFigure 6-1.
Locate the inspection windows on the clutch.1.
Place a 0.015 feeler gauge in the slot between the 2.
rotor and the armature.
Tighten or loosen the adjusting bolt as needed to 3.
acheive the 0.015 inch airgap. See Figure 6-4.
Perform this operation at all three inspection
windows.
ADJUSTMENT NUTS
ADJUSTMENT NUTS
Clutch Air Gap AdjustmentFigure 6-1.
This adjustment should be done every 500 hours of
operation or annually, whichever comes first. In cases
where the machine is heavily used, airgap settings should
be checked more often.
If the air gap is too narrow, the clutch armature may drag
when disengaged, resulting in premature failure.
If the air gap is too wide, the clutch may be slow to engage
as the magnet must pull the armature in from a greater
distance.