Hi Rusty Cuts
General Troubleshooting Guide
This is a common issue on the single‑spindle deck.
Do NOT drill new holes — the factory geometry works when everything is assembled correctly.
Below are the checks that normally identify the problem (just a general guide) .
🔧 Most Common Causes
Brake return spring in the wrong position
If the spring is hooked to the wrong tab/hole, the brake plate moves the wrong way.
Rod connected to the wrong hole on the bellcrank
The Autodrive lever has multiple holes. The wrong one reverses the action.
Brake pivot (17) installed 180° backwards
It can physically bolt on flipped. When reversed, the brake works backwards.
Brake plate (18) installed upside‑down
It looks symmetrical but isn’t. Upside‑down = reversed action.
Cable clamp positioned too far forward/back
This shifts the neutral point and makes the brake apply at the wrong time.
Correct Brake Behaviour
Deck disengaged:
Brake plate presses against the pulley
Belt is slack
Spindle stops quickly
Deck engaged:
Brake plate pulls away from the pulley
Belt tightens
Spindle spins freely
If yours does the opposite, the linkage geometry is wrong.
Fix Sequence (Before Modifying Anything)
Disconnect the deck‑engage rod
Let the brake arm sit in its natural rest position.
Check brake arm orientation
The brake pad must sit behind the pulley.
Check spring location
The spring must pull the brake on when disengaged.
Reconnect rod to the outermost bellcrank hole
This ensures the rod pulls the brake off when engaged.
Adjust cable tension last
Cable tension fine‑tunes the action — it should not reverse it.
❌ Why Drilling New Holes Is a Last Resort
Drilling a new hole in pivot (17) can cause:
Brake too weak → blade won’t stop
Brake too strong → brake drags
Only one chance to get the angle right
Almost never needed — the factory setup works when assembled correctly
Wrong spring position
Wrong rod hole
Brake pivot flipped
Brake plate upside‑down
One of those four almost always fixes the reverse‑acting brake.
Cheers
Max.
