Skyjack Telescopic Boom SJ61 T+

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

Is the standard pressure achieved?

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 charge pump relief valve?

Check Planetary reduction oil level

Replace differential oil every 800 Hours

Replace planetary reduction oil every 1000 Hours

Replace Self-locking differential gear oil every 700 Hours

Replace Gear box oil once at 50 Hours after every 1000 Hours

Sign off on the 200 Hourly Telescopic Boom Service

Warning: This procedure requires trained personnel with PPE!

Locate the pressure gauge on the brake valve assembly

IMPORTANT! Failure to remove the wiring may cause damage to components downstream

Remove the wiring from two valves: axle lockout valve wires 65 and 02, and two speed valve wires 45 and 02. Mark the valves to ensure you put the wiring back in the correct positions later

IMPORTANT Valve damage will occur if tightened too much

Locate the brake system pressure reducing valve PR1 4 . Loosen the lock nut and turn the adjustment stem gently clockwise 2 full turns

Start the engine from the platform control console and extend the boom slightly (approximately 12” (30 cm)) to achieve low speed drive

Drive the MEWP forward or reverse. The pressure gauge reading should be 400 psi. Stop the aerial platform. Follow the next steps for adjusting the relief valve pressure if needed. If no adjustment is required

Locate the brake system pressure reducing valve PR1 and turn the valve gently counterclockwise to the initial position

Drive the MEWP to rotate the hub until the plug is in the 3 or 9 o’clock position. Shut off the engine.

Remove the plug and check the oil level. The oil level should be even with the bottom of the plug hole.

Warning: This procedure requires trained personnel with PPE!

Turret ring gear grease fitting located beside the hydraulic tank

Grease pumped into the fitting until new lube appears continuously around the grease seal lip of the ring gear

Turret rotated in increments of 10 to 13 cm (4 to 5 inches) at a time

Open gear lube applied to each tooth of the swing drive gear, located under the turret

Axle cover plates opened and grease fittings located

Grease pumped into the axle grease fittings