Dealer Service 21; Troubleshooting Hydrostatic Pump; No Positive Neutral Position - Woods MOW'N MACHINE FZ22K Operator's Manual

Hide thumbs

Table of Contents

The information in this section is written for dealer ser-

vice personnel. The repair described here requires

special skills and tools. If your shop is not properly

equipped or your mechanics are not properly trained in

this type of repair, you may be time and money ahead

to replace complete assemblies.

 Before performing any service or maintenance,

lower attachment to ground, turn off power unit

engine, remove key, and disconnect battery

ground cable (negative -).

 Keep all persons away from operator control

area while performing adjustments, service, or

maintenance.

CAUTION

 Always wear relatively tight and belted clothing

to avoid getting caught in moving parts. Wear

sturdy, rough-soled work shoes and protective

equipment for eyes, hair, hands, hearing, and head;

and respirator or filter mask where appropriate.

TROUBLESHOOTING HYDROSTATIC

PUMP

Loss of Power in Transmission

1. Make sure transmission fluid is correct.

2. Make sure hydrostatic pump and fan blades are

clean.

NOTE: Overheating can cause loss of power or

fluid leaks from excess fluid expansion.

3. Make sure dump valves are tightened down.

No Positive Neutral Position

If drive wheels try to travel forward or reverse when

steering handles are in the PARK position (pivoted out-

ward), adjustment of hydrostatic pumps is necessary.

MAN0999 (12/4/2012)

DEALER SERVICE

ARNING

1. Block up power unit frame so both drive wheels are

off the ground.

2. Pivot steering arms to center.

3. Loosen jam nut (1) on linkage rod as shown in

Figure 9.

4. Place steering handles in the neutral position

(pivoted outward) and start engine.

5. If drive wheels turn, turn rod out or in until wheel

stops.

6. Tighten jam nut.

7. Repeat steps 3 through 6 for other hydrostatic

pump control arm.

Figure 9. Jam Nut on Linkage Rod

Straight Line Travel

1. Check tire pressure; tires must have equal air

pressure.

2. Check travel; drive forward with both steering

handles full forward at half throttle.

• If travel is not straight, adjust steering handle stop

bolt (2) on opposite side of turn.

• If power unit turns to the left, raise steering stop

bolt (2) on the right.

• If power unit turns to the right, raise steering stop

bolt (2) on the left.