Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower MECH-LAP-BAR Error Fix: Lap Bar Control Issues — Mower Pulls to One Side

The zero-turn mower drifts or pulls to one side when both lap bars are in the neutral or forward position, or the mower does not drive straight. Zero-turn mowers like the Craftsman Z560 use dual hydrostatic transmissions — one for each rear wheel — controlled by two lap bars. Each transmission must be calibrated to produce equal wheel speed. Causes: (1) Tracking adjustment needed — each transmission has a tracking adjustment (usually a bolt or knob at the rear) that fine-tunes wheel speed. If one wheel turns slightly faster, the mower pulls toward the slower side. Refer to the owner manual for the tracking adjustment procedure. (2) Unequal tire pressure — even a 1-2 PSI difference between the rear tires causes pulling. Inflate both rear tires to the same pressure. (3) Worn or loose lap bar linkage — the rods connecting the lap bars to the hydrostatic pump control arms wear at their pivot points, creating play that makes precise control difficult. Inspect and replace worn linkage components. (4) Hydrostatic pump wear — if one pump is more worn than the other, it produces less drive force. This manifests as gradual pulling to one side that worsens over time. Eventually the pump needs replacement. (5) Uneven terrain — some pulling on slopes is normal (mower tends to drift downhill). Adjust driving technique to compensate.

Medium severity2 fixes available

Quick Answer

Error MECH-LAP-BAR on the Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower means: Lap Bar Control Issues — Mower Pulls to One Side. The top-ranked community fix is “Inspect and Replace Worn Lap Bar Linkage Components” (hard difficulty, ~90 min, DIY cost: $10-$25). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · riding mower

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many riding mower repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$250.

Other Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower Error Codes

MECH-BATTERY-CHARGING

Battery Will Not Charge or Hold Charge

2 fixes

MECH-BELT-WEAR

Drive or Deck Belt Premature Wear, Breakage, or Slipping

2 fixes

MECH-BLADES-WONT-ENGAGE

Mower Blades Will Not Engage When PTO is Activated

2 fixes

MECH-ELECTRICAL

Blown Fuse or Complete Electrical Failure

2 fixes

MECH-FLAT-TIRE

Flat Tire or Tire Will Not Hold Air

Engine Oil Leak

Engine Overheats — Loss of Power and Potential Damage

2 fixes

MECH-RUNS-ROUGH

Engine Runs Rough, Surges, or Stalls

2 fixes

People Also Ask About Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower Error MECH-LAP-BAR

What does error code MECH-LAP-BAR mean on a Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower?

Error code MECH-LAP-BAR on the Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower means: Lap Bar Control Issues — Mower Pulls to One Side. The zero-turn mower drifts or pulls to one side when both lap bars are in the neutral or forward position, or the mower does not drive straight. Zero-turn mowers like the Craftsman Z560 use dual hydrostatic transmissions — one for each rear wheel — controlled by two lap bars. Each transmission must be calibrated to produce equal wheel speed. Causes: (1) Tracking adjustment needed — each transmission has a tracking adjustment (usually a bolt or knob at the rear) that fine-tunes wheel speed. If one wheel turns slightly faster, the mower pulls toward the slower side. Refer to the owner manual for the tracking adjustment procedure. (2) Unequal tire pressure — even a 1-2 PSI difference between the rear tires causes pulling. Inflate both rear tires to the same pressure. (3) Worn or loose lap bar linkage — the rods connecting the lap bars to the hydrostatic pump control arms wear at their pivot points, creating play that makes precise control difficult. Inspect and replace worn linkage components. (4) Hydrostatic pump wear — if one pump is more worn than the other, it produces less drive force. This manifests as gradual pulling to one side that worsens over time. Eventually the pump needs replacement. (5) Uneven terrain — some pulling on slopes is normal (mower tends to drift downhill). Adjust driving technique to compensate.

How do I fix error code MECH-LAP-BAR on my Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower?

The most successful fix is "Inspect and Replace Worn Lap Bar Linkage Components" (hard difficulty, ~90 minutes). Estimated DIY cost: $10-$25. HomeMD has 2 community-ranked fixes for this error.

Is error code MECH-LAP-BAR on a Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower error MECH-LAP-BAR myself?

Yes — the top-ranked community fix ("Inspect and Replace Worn Lap Bar Linkage Components") is rated hard difficulty and takes about 90 minutes. Tools needed: Socket wrench set, Needle-nose pliers, Penetrating oil, Screwdrivers.

How much does it cost to repair Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower error MECH-LAP-BAR?

DIY cost: $10-$25. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower have?

The Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower has 8 other known error codes, including: MECH-BATTERY-CHARGING (Battery Will Not Charge or Hold Charge), MECH-BELT-WEAR (Drive or Deck Belt Premature Wear, Breakage, or Slipping), MECH-BLADES-WONT-ENGAGE (Mower Blades Will Not Engage When PTO is Activated), MECH-ELECTRICAL (Blown Fuse or Complete Electrical Failure), MECH-FLAT-TIRE (Flat Tire or Tire Will Not Hold Air), and 3 more.

What other error codes does the Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower have?

The Craftsman Z560 54 in 24 HP V-Twin Zero-Turn Riding Mower has 8 other known error codes:

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