Ariens 992807-ProZoom 60 Specifications download pdf (Page 29)

GB - 29

HYDRAULIC SYSTEM

MAINTENANCE

IMPORTANT: Avoid damage to hydraulic

components as a result of contamination. Be

sure to wipe around the filler neck and cap

before removal of the hydraulic oil reservoir

cap. Do not open the oil reservoir cap when

hot unless it is absolutely necessary.

Check the reservoir daily for the proper fluid

level.

The pump and motor units require fluid

changes yearly or every 250 hours whichever

occurs first. The system filter should be

changed initially after the first 50 hours of

operation. The fluid and filter must be

changed and the system cleaned if the fluid

would become contaminated with dirt, water,

etc.

NOTE: The integrated pump/motor units are

equipped with bypass valves. (See Moving

the Unit with the Engine Off on page 23.)

Changing Hydraulic Fluid

1. Park the machine on a level surface,

stop the engine, put the steering control

levers in the park position and remove

the key.

2. Clean the area around the reservoir filler

cap and remove the filler cap from the

reservoir.

3. To drain the hydraulic fluid, place a

suitable container under the hydraulic

filter and remove it.

4. Place a thin coat of hydraulic oil on the

gasket on the oil filter. Before

reinstalling, make sure mount area is

clean of debris.

5. Install the hydraulic oil filter onto the filter

adapter.

6. Refill the hydraulic reservoir to the

recommended level. Reinstall the oil

reservoir filler cap.

7. Clean up any fluid which may have

spilled.

Bleeding/Purging the Hydraulic

System

IMPORTANT: Air in the hydraulic system is

the primary cause of hydraulic pump failures.

Following hydraulic system service or repair,

the hydraulic system MUST be correctly

purged of trapped air before placing the

mower back in operation.

1. To bleed the system make sure the oil

tank is full, the oil must barely cover the

fill baffle inside of the tank.

2. Raise the rear unit tires off the floor and

place it on suitable jack stands.

3. Open both pump bypass valves, one on

each pump, two full turns maximum.

4. Sitting in the operator’s seat, start the

engine and run it at idle.

5. Slowly cycle the steering control levers

full forward and full reverse for 10

seconds in each direction, 5 or 6 times.

NOTE: The rear tires should rotate, but they’ll

not be under load.

CAUTION: Be sure the engine

has been stopped, the steering

control levers are in the park

position, and the key has been

removed before changing or

checking the hydraulic oil in the

mower.

Allow the hydraulic fluid to cool.

The oil may be hot and could

cause serious burns.

Figure 18

Oil Drain

Screw

Engine Oil

Filter

OE3290

CAUTION: Be sure the engine

has been stopped, the steering

control levers are in the park

position, and the key has been

removed before changing or

checking the hydraulic oil in the

mower.

Allow the hydraulic fluid to cool.

The oil may be hot and could

cause serious burns.

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