844/642 Telehandler LIFT CYLINDER REMOVAL

STEP 32

Install the rear hood. Complete Steps 12 and 13 of Section 800 for the correct procedures.

Step 33

Start the engine. Move the machine to an open area and park on a level surface. Apply the park brake. Raise and lower the boom several times until all air is removed from the circuit.

STEP 34

Lower the boom and shut down the engine. Check for leaks. Correct any leakage found. Check the hydraulic fluid level. If necessary, fill to the correct level with the specified fluid.

Lift Cylinder Adjustment

PLEASE READ CAREFULLY: The eccentric pin that secures the base of each boom lift cylinder can be adjusted to accommodate minor differences in lift cylinder length. When the lift cylinders are adjusted properly, and the telescoping boom is fully raised, both cylinders will reach the end of their stroke at the same point. If the lift cylinders are improperly adjusted, one cylinder will reach the end of its stroke before the other and possibly cause the load on the carriage attachment to tip and/or fall.

CAUTION: Be sure there is adequate overhead clearance before performing the following test, which includes fully raising and extending the telescoping boom.

Check Lift Cylinder Adjustment

NOTE: Although it is not required, having an attachment carriage attached to the boom nose makes it easier to check lift cylinder adjustment. However, if a carriage is attached, there should be no load on the carriage.

STEP 35

Extend the telescoping boom approximately half-way out.

STEP 36

With an assistant carefully watching the boom nose and/or carriage, raise the boom as far as possible, until the lift cylinders reach the end of their stroke.

STEP 37

If one of the lift cylinders reaches the end of its stroke before the other, the boom nose and/or carriage will appear to tip slightly. If this happens adjustment of one or both eccentric pins will be necessary.

Lift Cylinder Eccentric Pin Adjustment

STEP 38

Fully retract and lower the telescoping boom on a support stand.

Mandatory Safety Shutdown Procedure

BEFORE cleaning, lubricating, or servicing this equipment:

1.Bring the machine to a full stop on a level surface. (If parking on a slope or hillside cannot be avoided, park across the slope and block the tires.)

2.Fully retract the boom and lower the attachment to the ground.

3.Place controls in NEUTRAL and set the park brake.

4.Idle the engine for gradual cooling.

5.Turn the keyswitch to OFF position and remove the key. Take the key with you for security reasons.

ONLY when you have taken these precautions can you be sure it is safe to proceed. Failure to follow the above procedure could lead to death or serious personal injury.

Template Name: OML_2_col

Template Date: 1994_04_22