Great Dane GDSZ52-16BV manual Tire Pressure, Height of CUT, Belt Tension Adjustment, Free Wheeling

SERVICING & ADJUSTMENTS

TIRE PRESSURE

.When mowing on relatively smooth ground, keep rear wheel tire pressure low, such as 14 to 16 psi. When mowing on rough ground, increase

tire pressure to 20 to 24 psi. This will produce a nicer level of cut.

.Note that the front caster wheels are foam filled and never need air .

HEIGHT OF CUT

.Rear wheels may be located in three or four positions. Use midpoint position for average cut from 2 to 4 inches. Highest hole position to cut from 3 to 5 inches. Lowest hole position to cut from 1 to 3 inches.

.Adjust caster wheel spacers to keep cutter deck tilted slightly down at the front.

.Vary number of spacers between cutter blade and spindle for higher height of cut.

BELT TENSION ADJUSTMENT

The belt drive from the engine to the hydro -'pumps is self adjusting, normally requiring no

maintenance.

.The belt from the engine to the cutter deck and the right hand spindle drive belt should be tightened only so that you can deflect the belt about 1/2 inch when pulling about 10 Ibs. If the belt is too tight, you may damage the engine or the spindle bearings. Too loose, and the belt will wear prematurely.

FREE WHEELING

.To move machine without having the engine running, rotate the dump valve levers of the left hand side of the hydro pump about one turn counterclockwise. Levers must be returned to original closed position to drive the machine.

HYDRO AIR BLEED PROCEDURE

When any of the hydro components or hoses are disconnected or removed and when the hydro oil is changed entrapped air must be bled from the system.

Disconnect small hose line from each pump going to the oil filter

.When oil starts to flow in a steady stream from end of hose, plug the hose

.When oil starts to flow in a steady stream from disconnected open port on the pump, reconnect hose to pump.

.Secure machine in a safe area, away from bystanders and facing a wall. Raise drive wheels off the ground and block caster wheels

Run full forward speed for about a minute and then reverse speed for another minute. Continue

to cycle until cavitations sound quiets down and full power is restored.

SPINDLE DISASSEMBLY

To replace ball bearings in the spindle assembly, there is no need to remove assembly from cutter deck

.Carefully clean all debris around the spindle assembly

.Remove the blade, bolt and flanged nut

.Slide off pulley and spacer washer. If pulley is seized on spline shaft, soak with solvent. Do not use hammer or wheel puller

.Remove wire clip ring at top of bearing around the shaft. Use sharp tool to extract

.Lower the entire shaft from the bottom of the spindle with lower bearing and spacer sleeve

.Discard old bearings at this time.

.Clean entire assembly

.Reinstall in reverse order. Place new bearing on shaft lower flange, slide on the spacer sleeve

.Slide the shaft assembly up into the spindle housing keeping shaft carefully centered. The lower bearing can easily bind since clearance is only .002 inch. Do not hammer into position. If the bearing seizes, take apart again and carefully reposition until the assembly slides easily and smoothly into housing

.Carefully center and install top bearing

.Insert wire clip, any spacers and pulley

BATTERY SERVICING

.Carefully fill each cell to the proper level with electrolyte, observing great caution when handling acid. Severe chemical burns may

result.

.Charge battery in open, well ventilated area and use proper procedure specified with the charging system.

.After neutralizing any acid spills, install battery and securely tighten wires.