How to change hydrostatic transmission fluid husqvarna

For Husqvarna Parts Call 606-678-9623 or 606-561-4983

Oil change

Most garden owners do not have tools for or

experience of changing transmission oil. The

transmission probably has a longer operational life

than other ride-on mower components, this makes

transmission oil changes less important for most

customers. However, the transmission's operational

life is increased if oil changes are made.

If the Rider is used professionally it is

recommended that the engine oil is replaced after

the first 50 hours in service and then every 500

hours or at least once a year.

IMPORTANT INFORMATION

Spent engine oil is hazardous to health

and must not be poured out on the

ground or in the nature, but should be

handed in to a designated place for

recycling.

Avoid skin contact and wash any spillage

with soap and water.

K62

Transmission holds 2,5 litres (SAE10W/30 engine

oil, class CD–SF).

• Empty the hydrostatic transmission with the two

plugs, width across flats 14 mm. The other

screws have smaller widths.

• Disconnect the hose that runs to the transmission

oil tank.

• Release the hexagonal socket head plug for the

filler hole at the front on the top of the transmis-

sion.

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K66

Transmission holds 2,5 litres (SAE10W/30 engine

oil, class CD–SF).

• Remove the plug from the drain hole.

• Disconnect the hose that runs to the transmission

oil tank.

• Release the hexagonal socket head plug for the

filler hole at the front on the top of the transmis-

sion.

K66, drain hole. The filter must be replaced when

the oil is changed.

K62 / K66, filler hole

Replace the drain plugs. Fill with oil through the

filler hole. Replace the hose and fill the oil tank.

Bleed the hydrostatic transmission as shown in

"Bleeding the hydrostatic transmission's oil system".

Test run the machine and top up with oil to the

correct level in the oil tank.

Reparation instructions

45

Svenska –

Hydrostatic transmissions use oil, under pressure, to provide movement for the tractor. The fluid is pressurized with a pump inside the transmission. If any air is in the fluid, the pump will try to pressurize air. This condition is known as cavitation, and is detrimental to the pump since it allows the pump top operate dry. When the pump cavitates it is not pressurizing any fluid, so the transmission is not able to provide the movement needed.

If your mower is new, or has been stored for a long period (longer than 2 months) the transmission needs to be purged before use. Also, if you experience loss of drive, or slower response, then the transmission should be purged first.

 The following procedure will remove trapped air inside the transmission(s).

IMPORTANT: SHOULD YOUR TRANSMISSION REQUIRE REMOVAL FOR SERVICE OR REPLACEMENT, IT SHOULD BE PURGED AFTER REINSTALLATION BEFORE OPERATING THE TRACTOR.

Step 1- Place the rear of the mower safely onto jackstands on a level surface with engine off and parking brake set.

Step 2- Disengage transmission by placing freewheel control, located at the back of the frame, in the freewheeling position.

          2a- Mowers with seperate pumps and wheel motors the freewheel is activated by turnign the bypass valves, one on each pump, two full turns.
          The oil resevoir needs to be filled to the specifications listed in the owners manual before starting the purge procedure.

Step 3- Sitting in the operators seat(riders), start engine. After the engine is running, move throttle control to slow position. With motion control levers in neutral (N) position, slowly disengage clutch/brake pedal.

Step 4-Move motion control levers to full forward position and hold for five (5) seconds. Move levers to full reverse position and hold for five (5) seconds. Repeat this procedure three (3) times.

NOTE: During this procedure there may be some movement of the drive wheels, but they are not under load. The air is being removed from hydraulic drive system.

Step 5-Move motion control levers to neutral (N) position. Shutoff engine and set parking brake. Check and add oil as needed for units with an oil resevoir.

Step 6-Engage transmission by placing freewheel control into driving position, or by closing the bypass valves on the pumps.

Step 7-Sitting in the operators seat, start engine. After the engine is running, move throttle control to full speed. With motion control levers in neutral (N) position, slowly disengage clutch/brake pedal.

Step 8-Slowly move motion control levers forward, after the tractor moves approximately five (5) feet, slowly move motion control levers to reverse position.
After the mower moves approximately five (5) feet return the motion control levers to the neutral (N) position. Repeat this procedure with the motion control levers three (3) times.

Step 9-Your mower is now purged and now ready for normal operation.

For further information or assistance, we recommend contacting your local authorized service center,

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