Operator's Manual

Figure 24

1. Roll pin

2. Castle nut

3. Top crank

4. Outer spacer

Aerator Gear Case Timing Tips

If disassembly of the aerator drive system is required for mainte-

nance, the unit will need to be retimed to ensure n balance, equal

loading of the tine arms and optimum hole quality. There are

two separate procedures to properly tine the aerator gear cases.

Use the following tips for each procedure when reassembling the

gear case.

Timing the upper and lower crank shafts on each

individual gear case

1. The upper and lower crankshaft flywheels for each tine arm

must be assembled so the offset shafts are located in the

same “clock” position. If the upper offset shaft is posi-

tioned at 12 o’clock, then the lower offset shaft must be at

the 12 o’clock position.

2. To achieve the proper position for each gear case, install the

timing bar (supplied with the machine) to the upper and

lower crankshaft by aligning each roll pin and securing the

socket head capscrew.

Synchronizing the Gear Cases

1. The tine arms are numbered 1 to 6 from left to right, as

viewed from the rear of the machine. Each of the three

gear cases must be connected to each other in a proper

phase to ensure that only one set of tines will enter the turf

at a time.

2. Rotate the number 1 tine arm to the lowest position as a

starting point. When viewed from the left side of the coring

head, the stamped numbers 2, 3, and 1 should be visible at

the top of the first, third and fifth upper crank, respectively.