Adjust The Pump Stroke - Graco G-Chem Series Instructions And Parts

Operation

Adjust the Pump Stroke

The stroke of the G-Chem pump can be adjusted by a
combination of a pin in the pump and the lever arm.
Stroke Adjustment with Pin Settings
The pump has three defined stroke adjustment posi-
tions.
1. Follow the Pressure Relief Procedure on page 12.
2. Disconnect the G-Chem pump (A) from the pump-
jack by removing the swivel block (B) from the lever
arm (122).
3. Expose the drive shaft by loosening the fasteners
(128) and removing the guard (127). The fasteners
are captive and will remain with the guard.
127
F . 6 Expose the drive shaft
IG
4. Push the split ring (121) left or right to expose the
dowel pin (120) in one of the stroke holes.
5. Push out the pin (120) using a screwdriver or punch.
14
6. Align the desired stroke hole (1/2, 3/4, or Full) with
hole in the fluid plunger (209). Use a screwdriver to
push in the pin (120).
121
209
F . 7 Stroke adjustment - pin positions
IG
7. Push the split ring (121) into place to cover the
pin (120).
8. Replace the guard (127) and tighten the fasteners
128
(128).
9. Reconnect the G-Chem pump (A) to the pumpjack
by reattaching the swivel block (B) to the level
arm (122).
Stroke holes
1/2
3/4
Full
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