Model T32338 (Mfd. Since 12/20)
-33-
Drain Valve
Handle
Inspecting
Check Valve
The check valve allows compressed air the enter
the tanks and prevents it from flowing back toward
the pump. The diaphragm in the check valve can
become damaged, twisted, or dirty and cause
the valve to leak or prevent the compressor from
pressurizing.
Tool Needed
Qty
Wrench or Socket 28mm ................................... 1
Eye injury hazard! Always
wear safety glasses when
handling pressurized air
system.
To inspect check valve:
1. DISCONNECT MACHINE FROM POWER!
Releasing air through safety relief valve
can be extremely loud. Protect hearing with
ANSI-approved hearing protection while
performing following step.
2. Use safety relief valve to reduce tank pres-
sure to less than 10 PSI.
3. Open drain valve to release any remaining air
(see
Figure 38).
Figure 38. Drain valve handle open.
Figure 39. Location of check valve cap.
Check Valve
Cap
5. Inspect seal ring and diaphragm (see Figure
40) for damage and dirt.
Figure 40. Check valve components.
Seal Ring
Diaphragm
4. Remove cap, shown in Figure 39, from check
valve.
6. Replace any damaged parts and clean any
dirt from diaphragm and seal ring.
7. Re-install check valve and cap.
IMPORTANT: Make sure diaphragm presses
squarely against discharge line and exhaust
tube openings.
Note: Do not add thread sealant or thread
sealing tape to cap threads. Seal ring pro-
vides sufficient sealing.
