Enerpac PR-Series Air - Manual (Page 8)

8
Change the oil as described in the following steps:
1. Be sure that cylinder is fully retracted and that the air line is
disconnected.
IMPORTANT: The 5 gallon [18,9 liter] hydraulic reservoir holds
approximately 4.2 gallons [15,9 liters] of oil when fi lled to the
proper level with cylinder fully retracted and motor off . Dispose
of used oil in accordance with all applicable laws and regulations.
2. Loosen and remove oil drain plug at bottom of reservoir.
Allow used oil to drain into a suitable container.
3. Clean and reinstall oil drain plug.
4. Remove, clean and reinstall the reservoir air breather. It is
located on the reservoir top cover plate, under the air fi lter/
regulator assembly.
5. Loosen oil fi ll plug at top of reservoir. Slowly fi ll the reservoir
until the oil level is about 1 inch [25 mm] below top of reservoir.
Use Enerpac HF hydraulic oil or a suitable equivalent that
meets the specifi cations shown in Table 8.
6. Reinstall oil fi ll plug.
7. Remove the old oil fi lter and replace it with a new one of
the proper specifi cations. Catch any spilled oil in a suitable
container.
8. Raise and lower the cylinder several times to check for
proper operation before placing the jack back into service.
RAISE
LOWER
Oil Fill Plug
Oil
Filter
Oil Drain
Plug
Air Breather
(under fi lter/
regulator)
Figure 6, Oil Change
6.3 Air Line Filter/Regulator (See Figure 7)
Every 30 hours of operation:
• Check the fi lter bowl for water. Drain any water if present.
• Inspect air fi lter element (inside fi lter bowl). Replace fi lter
element if dirty.
6.4 Air Line Lubricator (See Figure 7)
Before each use, check the fl uid level in the air line lubricator
and add additional lubricant if needed. Use an SAE 10 [ISO 32]
detergent oil or an approved antifreeze lubricant.
Check for an oil drip speed of approximately 3 drops per minute.
Adjust if necessary.
Air Line
Lubricator
Air Regulator
Filter Bowl
Lubricant
Reservoir
Drip Adjustment
Fill Plug
Water Drain
Figure 7, Air Line Lubricator and Filter/Regulator
6.5 Air Muffl er (See Figure 8)
Every 30 hours of operation:
• Check the air muffl er for dirt or debris. If clogged, replace the
muffl er with a new one of the same specifi cations.
Note: Air muffl er design and appearance will vary. On jacks
equipped with a Gast manufactured air motor, the felt pads
inside the muffl
er can be removed, cleaned and replaced.
6.6 Wheels and Tires (See Figure 8)
Every 30 hours of operation:
• Check the tires for wear or damage. Replace as required.
• Check the tire infl ation pressure. Each tire should be infl ated to
90 psi [6,2 bar].
Every 12 months:
• Lubricate both wheel bearings with a high quality wheel
bearing grease. Each wheel hub contains a grease fi tting.
Tire Air
Valve
Wheel Bearing
Grease Fitting
Air Muffl er
(appearance may vary)
Figure 8, Additional Maintenance Items