BYPASS HEAD MODEL 80BX

This Tri-Rotor pump model has an intergral dashpot relief valve-in-head. The standard spring can be set up to 65 PSI at which setting it will bypass full volume; the heavy duty spring can be set up to 100 PSI.

TO ADJUST BYPASS RELIEF PRESSURE

Remove hexagonal cap (A) and loosen locknut. Turn adjusting screw (B) in to increase pressure and out to decrease pressure. With:
Standard Spring, #J324, (min. 10PSI/Max. 65 PSI). Each full turn represents approx. 3 PSI. Do not exceed 17 total turns.
Heavy Duty Spring, #J531, (Min. 20 PSI/Max. 100 PSI). Each full turn represents approx. 8 PSI. Do not exceed 12 total turns.
Extra Heavy Duty Spring, #J6152, (Min. 40 PSI/Max. 145 PSI). Each full turn represents approx. 15 PSI. Do not exceed 8 total turns.

Tighten locknut and replace the hexagonal cap, making sure J328 gaskets are in place.

TO REVERSE DIRECTION OF ROTATION 80BX
(6 STEPS)

STEP 1: Unbolt bypass head and remove with bypass head gasket as one unit, making sure gasket is not damaged.

STEP 2: Unbolt shaft housing and remove together with rotor group and gasket as one unit.

THIS LEAVES PUMP IN THREE SECTIONS AS PICTURED.

STEP 3: Turn body "about face" and switch dowel pins.

STEP 4: Bolt the three sections back together, making sure the shuttle pin enters the bore of the shuttle.

STEP 5: To reverse bypass head components- release spring tension as described above. Remove valve cage with valve and remove end cap with spring and adjusting parts. Exchange to opposite sides of the head and reassemble.

NOTE: SPRING ADJUSTING SCREW MUST ALWAYS BE ON SUCTION SIDE OF PUMP. Be sure spring is centered on valve and adjusting plate.

STEP : Reverse wiring to run motor in opposite direction.

SOLID HEAD MODEL 80B

The model 80B has a solid head with the shuttle pin set in a fixed position to give constant volume for simple transfer service. A RELIEF VALVE SHOULD BE INSTALLED IN THE DISCHARGE LINE FOR PROTECTION.

TO REVERSE DIRECTION OF ROTATION 80B
(5 STEPS)

STEP 1: Unbolt solid head and remove with head gasket as one unit, making sure head gasket is not damaged.

STEP 2: Unbolt shaft housing and remove together with rotor group and gasket as one unit.

THIS LEAVES PUMP IN THREE SECTIONS AS PICTURED.

STEP 3: Turn body "about face" and switch dowel pins.

STEP 4: Bolt the three sections back together, making sure the shuttle pin enters the bore of the shuttle.

STEP 5: Reverse wiring to run motor in opposite direction.