Repair The Check Valves - Graco QUANTM QTC Series Instructions Manual

Repair the Check Valves

Required Tools:
• 10 mm socket wrench (for all QTC models and
QTD,E plastic models)
• 13 mm socket wrench (for QTD,E metal models)
See F . 8–F . 10.
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Disassemble Check Valves
To avoid severe burns, do not touch hot fluid or hot
equipment.
1. Follow Prepare Equipment for Repair, page 32.
2. Drain the equipment.
For equipment with a rotating stand: Remove the
quick-release pins (29b) and rotate the equipment
to drain. See F . 8.
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NOTE: After draining, rotate the equipment to
positions which will aid disassembly.
F . 8: Quick Release Pin, Rotating Stand
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3. For QT (Industrial) Models: On the outlet
manifold (4), remove all fasteners (6).
For QH (Hygienic) Models: On the outlet
manifold (4), remove all clamps (7a).
4. Remove the outlet manifold (4), seals (10, if
applicable), guides (9b, if applicable), checks (9),
and seats (8).
NOTE: Use care while removing manifolds to avoid
damage to check valve components.
3A8947A
29b
5. For QT (Industrial) Models: On the inlet
manifold (5), remove all fasteners (6).
For QH (Hygienic) Models: On the inlet
manifold (5), remove all clamps (7a).
6. Remove the inlet manifold (5), seals (10, if
applicable), guides (9b, if applicable), checks (9),
and seats (8).
NOTE: Use care while removing manifolds to avoid
damage to check valve components.
7. Clean and inspect parts for wear or damage.
Replace as needed.
Reassemble Check Valves
1. Align and place seats (8), checks (9), guides (9b, if
applicable), seals (10, if applicable), and manifolds
(4, 5), exactly as shown for your equipment model.
See your related parts manual. See Related
Manuals, page 2.
2. For QT (Industrial) Models: Use the fasteners (6)
to loosely attach the manifolds (4, 5) to the fluid
covers (3). After all components are properly
aligned, torque the fasteners (6) on the manifolds
(4, 5). See Torque Fasteners, page 43.
For QH (Hygienic) Models: Use the clamps (7a) to
loosely attach the manifolds (4, 5) to the fluid
covers (3). After all components are properly
aligned, securely tighten the clamps (7a).
Repair
33