Textron Jacobsen 600 Series User Manual

HYDRAULICS
8L-54
Front Motor Test
1. Install wheel restraints on the front wheels and
lock parking brake.
2. Jack up rear of tractor and support with stands so
that both rear wheels are off the ground.
3. Start engine and bring to full throttle. Slowly push
traction pedal to forward position.
4. Observe the speed of the rear wheels. They both
should be slowly turning. If, for example, the right
rear wheel is turning fast while the left is turning
slowly, this is an indication that the right front
wheel motor is leaking oil internally.
Rear Motor Test
1. Install wheel restraints on the rear wheels and
unlock the parking brake.
2. Jack up front of tractor and support with stands so
that both front wheels are off the ground.
3. Start engine and bring to full throttle. Slowly push
traction pedal to forward position.
4. Observe the speed of the front wheels. They both
should be slowly turning. If, for example, the right
front wheel is turning fast while the left is turning
slowly, this is an indication that the right rear
wheel motor is leaking oil internally.
LIFT SYSTEM TEST
The purpose of this test is to determine if the lift cylin-
der is bypassing fluid internally.
1. Operate the mower until the hydraulic oil reaches
operating temperature, 110 – 130°F (43 – 54°C).
2. Lift the mower deck and shut off the engine.
3. Using a marker, mark the cylinder rod 1/2 in.
(13 mm) above the cylinder barrel.
4. Allow the mower to stand for 1 minute.
Conclusion
• If the mark on the cylinder rod is visible, the lift
system has normal internal leakage.
• If the mark on the cylinder rod disappears into the
barrel of the cylinder, proceed with STEP 5.
5. Lift and support the deck. Shut off the engine.
6. Disconnect the hydraulic hose from the retract
side of the lift cylinder (Figure 8L-1). Immediately
plug the hydraulic hose.
Figure 8L-1. Lift Cylinder
7. Place a container underneath the cylinder (mini-
mum 1 gallon (3.8 liter) capacity).
8. Slowly lower the floor jack and observe the cylin-
der retract side port.
Conclusion
• If the deck does not drop and hydraulic oil does not
flow from the cylinder, the cylinder is not bypassing
and the problem may be in the lift valve.
• If oil flows from the cylinder port and the deck drops,
the cylinder is bypassing oil and must be replaced or
repaired.
NOTICE
Use a floor jack and board to support the deck, being
careful not to damage the deck.
Cylinder
Retract
Side
Extend
Side

Textron Jacobsen 600 Series Specifications

General

Brand	Textron
Model	Jacobsen 600 Series
Category	Lawn Mower
Language	English