Yard Machines 378 Lawn Mower User Manual


 
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Step 13. Squeeze the belt together and push belt
forward. Press the control arm inward towards
the deck and remove the six speed cable from
the slot.
Step 18. Pivot the control arm down away from the
pulley and belt.
Step 14. Place the new belt over the transmission
pulley. Start the belt in pulley groove and rotate
pulley until belt is seated in transmission pulley.
Step 15. Place belt between idler pulley and the belt
keeper bracket.
Step 16. Using pliers, rotate the belt keeper bracket
so that it snaps into slot on the idler bracket.
Step 17. Tighten the idler pulley bolt and locknut
using two 7/16” wrenches.
Step 19. Lift off the lower pulley assembly and
remove the old belt from around the crankshaft.
Step 20. Place belt between the two pulley halves on
the crankshaft. Make sure to route the belt
inside the belt guard pin.
IMPORTANT: When changing the belt, do not disassemble
the lower pulley assembly.
Belt
Six-Speed
Cable Slot
Control
Arm
Control
Arm
Six-Speed
Cable Slot
Transmission
Belt Keeper
Bracket
Idler Pulley
Belt
Idler Pulley
Bracket
Transmission
Pulley
Bolt and
Locknut
Belt
Lower Pulley
Half
Crankshaft
Belt
Lower
Pulley
Half
Upper
Pulley
Half
Belt
Pin
Tab
Guard