Reversal Of Compressor Rotation - Quincy Compressor QR-25 Series Instruction Manual

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Reversal of Compressor Rotation
Pressure lubricated QR-25 series compressors can be modified to operate in
reverse rotation with exception to the Models 206 & 210. These two models
PLx 1068
Fig. 5-4
Compressor Directional
&rows
operate in the counterclockwise direction only.
To reverse the operating direction of a pressure lubricated compressor,
perform the following steps:
Step 1) Remove:
- the control tubing from the hydraulic unloader and pilot valve (if so
equipped).
- the oil pressure gauge and hydraulic unloader.
- the pilot mounting stud set screw and pilot valve assembly.
- the oil filter" (turn counterclockwise).
- six (6) oil pump housing bolts.
Step 2) Rotate the oil pump housing l/. turn (1800). (Note: The rotational
arrow at the top of the pump "housing should now reference the
direction you wish the compressor to rotate. (See Fig. 5-4,
Compressor Directional Arrows)
Step 3)
Re-install the six (6) housing bolts and torque them in a star or
cross pattern to six (6) ft.-lbs.
Step 4) Remove the countersunk pipe plug* from the oil pump housing and
relocate it in the opposite (bottom) hole. (SeeFig. 5-5, Relocating
Countersunk Pipe Plug)
Failure to relocate this pipe plug will result in complete loss of oil flow
throughout the compressor. Compressor seizure will result and warranty will
be void. The countersunk pipe plug must always be relocated in the bottom port
position.
d
Step 5) Install a new oil filter*. Tighten the filterl/O turn after initial gasket
.
contact,
Step 6) Re-assemble the control components in reverse order,
Step 7)
Step 8)
I
Rx 1154
Fig. 5-5 Relocating
Countersunk Pipe Plug
Step 9)
*Not applicable to models without oil pumps.
Double check the directional arrows.
For aircooled models only, remove the standard compressor sheave
and replace with a reverse rotation sheave available from your
local Quincy Compressor Distributor.
Start the compressor and adjust the oil pressure.
QR-25
Series
QUINCY COMPRESSOR
52201-104
23 Februarv 1994