Trebor 610RC Magnum User Manual
Page 8
Page 8
M610RC
8100 South 1300 West, West Jordan, Utah 84088 USA Tel: 801-563-0303 Fax: 801-255-2312
www.treborintl.com
4.4.b
Adjustment
The Check Muffler is preset at the factory to a setting that makes the pump cycle at a slow constant
rate with the fluid discharge port closed, and the pump air supply at 45 PSIG. This setting also allows
the pump to operate with approximately 4 ft. (1 meter) of H
2
O positive fluid supply pressure.
“Deadheading” at other air supply pressure or with more positive fluid supply pressure (fluid source
above pump) may require user adjustment. The adjustment should control the pump to a slow,
steady cycle rate with no erratic cycling, “machine gunning”, evident.
NOTE: If pump application does not require operation in either of these conditions, loosen check muffler
adjustment screw by turning counter-clockwise for minimum restriction. Note: Pump capacity is reduced
as check muffler adjustment is increased in the clockwise direction.
Figure 4-2
Loosen locking nut.
Turn adjustment screw clockwise (CW) to increase backpressure.
Turn adjustment screw counter-clockwise (CCW) to decrease backpressure.
Tighten locking nut when done to maintain adjustment.