Repair; Pinch Hose Inspection; Replacing The Pinch Hose; Installing The Pinch Hose - Graco EcoQuip 2 EQp Operation, Repair, And Parts

Repair

Repair

Pinch Hose Inspection

Inspect the pinch hose monthly looking for "bubbles" in
the outer casing. If bubbles in the casing are noticed,
replace the pinch hose. It is recommended to have a
spare pinch hose (see Kits and Accessories, page 39)
on hand in case of failure. The life of the pinch hose
depends on the air inlet pressure to the system, the
media used, and the rate at which the blast control
switch is triggered on and off. Keep a record of your
pinch hose life to know when preventative maintenance
should be performed in the future.

Replacing the Pinch Hose

1. Perform Pressure Relief Procedure, page 7.
2. Remove the claw coupler (CP).
3. Remove lock nut (S1) on the exterior of the control
box.
4. Remove the clamp (HC) connecting the blast outlet
(B) to the blast inlet assembly (BI).
5. Loosen the lock nut (S2) on the interior of the con-
trol box. Move the blast inlet assembly (BI) to the left
to allow room to remove the blast circuit.
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6. Remove check valve components (G1, G2, G3,
G4).
7. Remove the bottom hose clamp (C2).
8. Pull the pinch hose (PH) out of the box.
NOTE: use the blast circuit (BC) as a handle and
twist while pulling.
9. Loosen the remaining hose clamp and remove the
pinch hose from the circuit.

Installing the Pinch Hose

1. Place both hose clamps (C1, C2) on the pinch hose
(PH). Leave 1/4 in. of hose exposed on the ends.
2. Slide the pinch hose (PH) onto the barb at the blast
circuit (BC).
3. Reinstall the blast circuit (BC) and pinch hose (PH)
into the box through the pinch valve.
4. Tighten lock nut (S1).
5. Inspect gasket (G) and replace if necessary, install
between the blast inlet assembly and the blast outlet
(B).
6. Install check valve components (G2, G3, G4) with
the plunger head o-ring (G5) facing the air regulator
between the blast inlet assembly (B1).
7. Install and tighten clamp (HC) to 15 ft-lb (20.3 N•m).
8. Tighten the hose clamps (C1, C2) to 85 +/- 5 in-lb
(9.6 +/- 0.56 N•m).
9. Tighten (S2).
10. Install the claw coupler (CP).
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