14
5. Reinstall the lubricator fill plug.
6. Reconnect the air supply hose. Be sure the air shut-o
ff
valve
is in the OPEN position.
7. Check the lubricator drip speed in the drip window:
• Drip speed should be 4 to 5 drops per minute. Always check
the drip speed while the cylinder is advancing or retracting.
• If drip speed is too slow or too fast, readjust the drip speed
as required. Use a flat blade screwdriver to turn the drip
speed adjustment screw.
NOTICE
Air line lubricator is manufactured by Norgren. Contact
Norgren for detailed maintenance instructions, filter elements
and replacement parts.
8. Reinstall the jack rear access cover. Refer to Section 7.1.
7.7 Air Mu
ffl
er (See Figure 14)
Every 30 hours of operation:
1. Remove the jack rear access cover. Refer to Section 7.1.
2. Disconnect the air supply hose from the air shut-o
ff
valve.
Completely relieve any trapped air in the jack pneumatic
system. Follow procedure in Section 7.2.
3. Inspect the air mu
ffl
er. Remove any loose dirt or debris.
4. If old air mu
ffl
er is very dirty or clogged, replace it with a new
air mu
ffl
er. Use only a 25 micron air mu
ffl
er of the original
specifications (Enerpac Part No. DD4791116 or equivalent).
Air Mu
ffl
er
Figure 14, Air Muffler
7.8 Wheels and Tires (See Figures 15 and 16)
Every 30 hours of operation:
• Check the tires for wear or damage. Replace as required.
• Check the tire inflation pressure. Each tire should be inflated
to 90 psi [6,2 bar].
• Inspect the caster wheels for damage. Remove any loose dirt
Check that each caster wheel rotates and pivots freely and
that mounting hardware is properly tightened.
Every 12 months:
• Lubricate the wheel bearing at each wheel hub with a high
quality wheel bearing grease.
• Each caster wheel contains a wheel bearing and a pivot
bearing. At each caster wheel, lubricate both bearings with a
high quality wheel bearing grease.
Wheel Bearing
Grease Fitting
Tire Air Valve
Figure 15, Wheels and Tires
Caster Wheel
Grease Fittings
Figure 16, Caster Wheel Bearings
7.9 Lubrication of Cylinder Threads and Lock Nut
Chain Drive (See Figures 17-20)
The cylinder threads and lock nut drive chain should be lubricated
approximately every 30 hours of operation. Both lubrication
activities can be performed at the same time, as described in the
following steps:
1. Be sure there is no load on the jack.
2. Unhook the rubber latches and remove the jack rear access
cover. See Section 7.1 for procedure.
NOTICE
Before performing lubrication procedures, the cylinder
must be fully extended and the jack pneumatic system must be
depressurized. Follow instructions in steps 3a-3f.
3. Fully extend the cylinder and depressurize the jack pneumatic
system:
a. Depress and hold the pendant UP button to raise the
cylinder. Continue holding the button until the cylinder is
fully extended and the jack air motor stops running. See
Figure 17.
b. Move the jack air-shuto
ff
valve to the CLOSED position.
c. Disconnect air supply hose at jack air-shuto
ff
valve.
