Sullivan-Palatek UD Series, User Manual

Page: 55 / 102

47 MAINTENANCE
6.2 GENERAL MAINTENANCE SAFETY
WARNING!
Never assume a compressor is safe to work on just because it is not operating. It could restart at any time.
Do not allow oil to accumulate on, in or around acoustic noise material. Immediately replace any oil-
soaked material after cleaning enclosure surface with nonflammable solvent.
Do not substitute bolts with material or markings different from the original equipment.
CAUTION! Do not over-tighten any bolt, nut fitting, connection or spin-on filter element.
Perform repairs and maintenance only in clean, dry conditions in a well-lit and ventilated area.
Clean up any spilled oil or oil leakage and repair oil leaks as soon as they are discovered.
6.3 STOPPING FOR MAINTENANCE
The following procedures should be followed before doing any maintenance on the compressor and will not
be repeated in any of the maintenance procedures.
1. Per Occupational Safety & health Administration (OShA) regulation 1910.147: The Control of hazardous
Energy Source (Lockout/Tagout), disconnect and lockout the main power source. Display a sign in clear
view at the main power switch stating that the compressor is being serviced.
2.
Isolate the compressor from the compressed air supply by closing a manual shutoff valve downstream
from the compressor. Display a sign in clear view at the shutoff valve that the compressor is being
serviced. be certain that a pressure relief valve is installed upstream of any isolation valve.
3.
Wait until sump pressure reading is 0 psig.
4. Open all manual drain valves within the area to be serviced.
5. Wait for the unit to cool before starting to service. Temperatures of 125°F (52°C) can burn skin. Some
surface temperatures exceed 250°F (121°C) when the compressor is operating and just after it is shut
down.
6.4 bOLT TORQUE GUIDELINES
6.4.1 INCH FASTENERS
INCH FASTENERS TORQUE
Size
SAE Grade 5 (ft-lb) SAE Grade 8 (ft-lb)
Dry Oiled Dry Oiled
1
⁄
4
–20
8 6 12 9
5
⁄
16
–18
17 13 25 18
3
⁄
8
–16
30 23 45 35
7
⁄
16
–14
50 35 70 55
1
⁄
2
–13
75 55 110 80
9
⁄
16
–12
110 80 150 110
5
⁄
8
–11
150 110 220 170
3
⁄
4
–10
260 200 380 280
6.4.2 BOLT TORQUE FACTORS
LUbRICANT OR PLATING TORQUE CHANGES
Oil Reduce torque 15% to 25%
Dry film (Teflon or moly based) Reduce torque 50%
Dry wax (Cetyl alcohol) Reduce torque 50%
Chrome plating No change
Cadmium plating Reduce torque 25%
Zinc plating Reduce torque 15%
6.4.3 BOLT TORQUE STAGES
STAGE TORQUE
1st 20-25 ft/lbs
2nd 55-60 ft/lbs
3rd 85-95 ft/lbs