En) Maintenance; En) Service; Air Motor; Exchange Of Seals In Outlet Body - Orion 22771 User Manual

Manual 22771_EN_SE_1D
3.

(EN) Maintenance

Empty and clean the air filter. If a lubricator is installed it should always be filled with air tool oil or similar. Mineral
based motor oil, SAE 10, can also be used, Synthetic oil or other oils must not be used. Check for possible leakage
in the connections or couplers. Keep the fluid and equipment clean and free from dirt. When changing drum, make
sure the pump tube and bottom valve are kept off the floor.
4.

(EN) Service

Avoid damaging seals and all moving surfaces. When servicing the pump, all parts should be protected from dirt,
especially the cylinder and central bar. Keep the working area and tools clean. Clean and grease all surfaces with
silicon grease or similar, especially all O-rings and moving surfaces. Use kerosene or similar liquid for cleaning the
air motor parts.

4.1. Air motor

Fasten the outlet housing of the pump into a vice in a vertical position. Loosen the four screws in the lid.
Remove the lid. Air supply nipple (Pos 2) is sealed by two O-rings in the valve mechanism. To inspect the air
filter u carefully thread a screw, M6 or W¼", between ½ and 1 turn inside the filter. Pull up and clean or
change it. Loosen the silencer's (Pos 25) four screws (Pos 28) and remove the protective cover (Pos27).
Unscrew the six screws (Pos26), which keep the mechanism (Pos 1) in place. It is now possible to inspect
and replace the valve mechanism or replace the valve spool kit (Pos 24). To inspect the air motor cylinder,
loosen the four lower screws (Pos 29). Pull the air motor off the piston. Change all damaged and worn parts
and Reassemble in reverse order.
Important! Lubricate all parts and seals in the air motor before reassembly with Silicone

4.2. Exchange of seals in outlet body

Fasten he lower part of the air motor into a vice with pump tube in horizontal position. Loosen the four lower
screws (Pos 29) and pull off the air motor with the complete valve mechanism. Release the piston (Pos 5)
from the central bar (Pos 15). Disassemble the entire fluid part by releasing the lock nut seal screw (Pos 11)
and unscrew the complete "wet" part. It is now possible to inspect the upper seal (Pos 7). Fasten the stainless
outlet body into a vice. Unscrew the pump tube (Pos 20). Pull the central bar (Pos 15) out through the Teflon
seal kit (Pos 12). Inspect all working surfaces and replace all worn or damaged parts. Be very careful when
handling the PTFE (Teflon®) seals, they are very easy to damage.

4.3. Pump mechanism

First carry out the first 2 steps in "Exchange of seals in outlet body", see above. Fasten the stainless outlet
body into a vice. Unscrew the pump tube (Pos 20). Pull the central bar (Pos 15) out through the PTFE
(Teflon®) seal kit (Pos 12). Inspect the piston (Pos 19) and replace the seal (Pos 23) if necessary. Be careful
to avoid any dirt getting in and around the piston assembly. Replace all parts that are worn or damaged. If
you suspect dirt in the bottom valve (Pos 21) unscrew it for inspection. If the bottom valve is removed the O-
ring (Pos 22) must be replaced. If the pump tube is removed from the outlet body the O-ring (Pos 16) must be
replaced. Do not over tighten the bottom valve or pump tube when reassembling. The O-rings will seal
against leakage.
5.

(EN) Trouble shooting

5.1. Pump stationary or run very slowly.

1. No or low air pressure.
2. Faulty air motor.
3. Blocked air inlet filter.
4. Ice blocking air exhaust.
5. Foreign object jamming movement of central bar.
5.1.1.

Solution

1. Check the air supply valve, regulator and quick coupler.
grease. No other grease should be used.
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