3. CHECKING, DISASSEMBLING AND SERVICING

[1] DISASSEMBLING AND ASSEMBLING

(1) Separating Front Wheel and Wheel Bracket

Remove the front Wheel

1. Inspect all parts for wear or damage. Replace the parts as needed.

(When reassembling)

• Apply grease to grease fittings (6). (See page G-24.) Tightening

(1) Spacer (5) Hex. Bolt

(2) Oil Seal (6) Grease Fitting

3GZAAAD6P002A

(3) Thrust Ball Bearing (7) Sleeve

(4) Locking Nut W1010912

Remove the Wheel Bracket

1. Remove the wheel cap (1 ).

2. Remove the lock nut (2) and wheel bracket (6).

3. Inspect all parts for wear or damage. Replace the parts as needed.

(When reassembling)

• Do not mistake the direction when reassembling the plate spring (3), bearings (4) and oil seal (5).

(1) Wheel Cup (5) Oil Seal

(2) Lock Nut (6) Wheel Bracket (3) Plate Spring (7) Grease Fitting

1. HYDRAULIC CIRCUIT

Relief Valve

The hydraulic system of this machine is composed of a hydraulic pump (10), control valve assembly (5), mower lift cylinder (3) and other components.

This system has the following functions.

Oil is supplied by hydraulic pump (10) which is driven by engine.

Power from the input shaft (pump shaft) is distributed right and left with the bevel gears and drives each hydrostatic transmission (12).

Moreover, oil from the hydraulic pump (10) is sent to the transmission centre case through the control valve. On the other hand, oil is regulated with the regulator valve (7) to constant pressure and sent to the hydrostatic transmission (12) and PTa clutch (1)_

Pump

The oil pump in this transmission is a trochoid pump. Inside the pump body, the 6 lobe inner rotor (2) is eccentrically engaged with the 7 lobe outer rotor (1). The inner rotor is driven by the input shaft, which in turn rotate the outer rotor.

(1) Outer Rotor (4) Input Shaft

(2) Inner Rotor (5) Charge Pump Cover

(3) Center Cover

W1012875