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40041-0173 PILOT AIR VALVE
| 1 | P50570-1 | TIE BOLT NUT-LONG |
| 2 | 12 VOLT COIL | 12 VOLT COIL |
| 3 | 536-579 | O-RING |
| 4 | P50569 | STEM |
| 5 | PILOT REPAIR KIT | REPAIR KIT |
| 6 | P49985-3 | TIE BOLT NUT |
| 7 | P50570-1 | TIE BOLT NUT-SHORT |
| 8 | P57662 | BALL HANDLE |
| 9 | P50402 | HANDLE |
‘D’ Pilotair valves are spool type directional valves with two-way, operation.
They are built with open exhaust ports and with tapped exhaust ports.
The ‘D’ Pilotair valve is operated by lever, or solenoid.
Adjustment
The ‘D’ Pilotair valve does not require adjustment.
Maintenance Periodically dismantle the ‘D’ Pilotair valve is for inspection and cleaning.
Wash all metal parts with kerosene of a solvent with like characteristics.
Wash all seals with soap and water and examine them for cracks or signs of wear.
Dry all parts with a low pressure air jet. Replace worn or defective parts.
During reassembly, lubricate all friction surfaces and seals with No.1 grade graphite grease.
When reassembling the valve, place the stenciled end of the stem at the end of the valve
with the name plate.
Kit Assembly
At times, operators in kit form and assembled valve portions are stocked separately and
complete ‘D’ Pilotair valves are assembled as needed. The operator kits are packages
containing all the operator’s parts and all the fastening needed to assemble the operator to the valve.
The explored illustrations accompanying the operators parts lists in this booklet show how
the parts fit together.
To assemble a complete valve from the kits, remove the stem from the valve portion.
Assemble the operator portion and connect the stem to it. Cover the stem with light oil.
Remove the tie rod nuts and always assemble the short threaded end of the tie first to use
the full thread. This will obtain full thread engagement on both ends when the long
threaded end is assembled last. Insert the stem in the valve portion. Tighten tie bolts evenly together.