Close air tank valve (2) to shut off air supply.
Open all block valves (5) on process air manifold (11) or utility air manifold (12).
On Model ROWPU-1, remove plug (16).
Air pressure gage on air regulator must read zero before disconnecting any air line fitting,
otherwise injury may occur.
Open manifold bleed valves (4).
Check air pressure gages (3). They should read zero.
Tag and remove individual air tubing as necessary (para. 4-24).
Remove capscrews (6) and remove manifolds.
If necessary, remove capscrews (7), lockwashers (8), washers (9) and brackets (10).
Do not over tighten threaded parts, plastic parts will crack.
Replace elbows (13), block valves (14) and nipples (15) as necessary. Turn counterclockwise to remove.
Replace manifolds (11 and 12) if cracked or damaged.
Tighten loose fittings and apply antiseize tape where required to stop leaks.
Replace any unserviceable item.
If removed, install brackets (10) with capscrews (7), lockwashers (8) and washers (9).
Install manifold (11 or 12) with capscrews (6).
Install removed air tubing (para. 4-24).
On Model ROWPU-1, install plug (16).
Open all block valves (5).
Close manifold bleed valves (4).
Open air tank valve (2).
Turn air compressor (1) ON.
Check for leaks using soapy water solution. Air bubbles indicate leaks.
4-262 Change 7