Scag SM-52, SM-72, SMTH-20KH, STHM-20KH User Manual

Specifications and Main Features

  • Models: STHM-20KH, SM-52, SM-61, SM-72
  • Engine: 20 HP Kohler (MV20S PS-57511)
  • Tire Pressures: Caster Wheels 25 PSI, Rear Steering Wheel 25 PSI, Drive Wheels 15 PSI
  • Cutter Deck Adjustments: Pitch and height adjustments
  • Blade Drive Belt: Tension adjustment, moves half an inch with ten pounds of pressure
  • Hydro Drive Belt: Spring loaded; adjustment is not necessary
  • Cutter Deck Drive Belt: Adjustment of tension is needed once spacing to over roof is achieved
  • Features: Parking brake, neutral adjustment, mower engagement control, compatibility with grass catchers and routing of steering cables

Frequently Asked Questions

Q: What should I do if the drive wheels rotate in neutral?

A: Inspect the bolt located at the neutral adjustment of the neutral control spring for “zero free play” and make any necessary adjustments.

Q: How can I adjust the mower blade height?

A: The height of blades can be modified by shifting the spacers positioned on the bolts that attach the blades to the spindle shaft either upwards or downwards.

Q: What type of oil should I use in the engine?

A: Apply the SAE 10W30 motor oil selected in the manual.

Q: What is the method of checking the hydrostatic oil reservoir?

A: The correct oil level should not exceed three inches from the top of the reservoir. Make sure not to fill it up too much.

Q: Is it possible to work upon the slopes with a steep angle using the mower?

A: Steep slopes aren’t suggested to be mowed due to risks of tipping or difficulty in maneuvering the mower.

User Manual

Scag SM-52, SM-72, SMTH-20KH, STHM-20KH User Manual
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