Skyjack Telescopic Boom SJ66 T+

Place a suitable container under the axle.

Remove all three drain plugs to allow the oil to drain into the container.

Reinstall all of the drain plugs.

Refill the axle with new oil as per specifications.

Reinstall both of the fill and check plugs.

Sign off on the oil replacement procedure.

Locate test port TP3 on the drive pump

Connect a pressure gauge (600 psi) to the test port

Start the engine from the base control console

WARNING! To protect the gauge, do not activate any controls during this procedure

Check the reading on the gauge. Standard pressure should be 313 ±31 psi

Replace the charge pump relief valve RV10 4 if the standard pressure is not achieved

Repeat steps 2, 3, and 4 after the charge pump relief valve is replaced

Is the pressure in range after replacing the valve?

Warning: This procedure should be performed by a trained mechanic.

Remove the oil level plug from one of the braking axle arms

Insert a 4.5 mm feeler gauge into the drain port and measure the gap between the disks

Repeat the inspection on the other axle arm

Is the gap smaller than 4.5 mm between the disks of either arm?

If the gap is smaller than 4.5 mm between the disks of either arm, the brake disks must be replaced on both arms.

Repeat the procedure on the opposite axle

Sign off on the brake inspection

Extend the fly boom to this length (in cm)

Drive one of the steer tires up onto a 15 cm (6”) block or curb.

Did an appropriate tilt of the MEWP chassis occur?

Retract the fly boom while in the tilted position.

Did the steer axle unlock and the chassis level itself with the ground?

Sign off on the Oscillating Axle Cylinder procedure

Locate the GP2 port 1 on the main manifold

Connect a pressure gauge (5000 psi) to the GP2 port

Start the engine from the base control console and let it run for 2-5 minutes

Raise the main boom to ensure the basket will not contact the ground

Engage the turret transport lock

Attempt to rotate the turret. The pressure should be 1250 psi. Follow the next steps for adjusting the pressure, if needed

Locate the turret rotate relief valve RV2 2

Loosen the lock nut on the turret rotate relief valve RV2. Turn the adjusting stem clockwise to increase the pressure and counterclockwise to decrease the pressure

Tighten the lock nut on the turret rotate relief valve RV2 once 1250 psi is observed on the gauge. You must activate the turret rotate to obtain a pressure reading on the gauge