Control Power Hop

Power hop is a condition where tractor exhibits severe bounce and/or jump at field working speeds under 16 km/h (10 mph). Power hop is associated with tractors pulling towed implements at medium to high draft loads in loose, dry soil on top of a firm base and/or when climbing hills. As a result, tractor cannot maintain pull due to loss of traction, rough ride, or both.

Adjust inflation pressures only after following performance guidelines (recommended weight split, correct ballast, and correct inflation pressures):

NOTE: HydraCushion™ suspension system must be properly set and turned ON to help control power hop.

1. A) Increase REAR tire pressure by 41-55 kPa (0.4-0.6 bar) (6-8 psi) in 2 psi increments over rated pressure for axle load. Follow steps 2 and 3.

   B) If power hop remains a problem, reduce front tire pressure to rated pressure. Then raise FRONT tire inflation pressure by 41-55 kPa (0.4-0.6 bar) (6-8 psi) in 2 psi increments above rated pressure for axle load. Follow steps 2, 3, and 4 below.

   NOTE: Raising front or rear inflation pressure depends on weight splits, operating conditions (steep slopes) or travel speeds. On steep slopes and operating speeds above 8.8 km/h (5.5 mph) raising rear tire pressure is recommended.

   Tires on one of two axles must remain at rated pressure.

   Ballast tractor so no more than 55 percent of total tractor weight is on front for best power hop control.

2. Remove any liquid ballast and replace with cast weight equivalent, if power hop remains a problem.

3. Liquid ballast has a stiffening effect that causes rough ride. If liquid ballast is used in rear tires, all tires on axle must be filled to same level which should not exceed 40 percent fill.

   IMPORTANT: Do not use liquid ballast in front tires.

4. If power hop remains a problem, see your John Deere™ Dealer.